紫花苜蓿BADH基因家族的全基因组鉴定
BADH家族/相关ALDH基因的生物化学功能与BADH在渗透胁迫中的作用
这些研究共同聚焦于BADH(以及更广义的ALDH)在植物渗透胁迫/盐旱等适应中的生理功能:作为甜菜碱醛脱氢酶参与甘氨酸甜菜碱(GB)生物合成与积累,从而提高耐受性;同时也涉及BADH与其他胁迫相关机制(如光合电子传递相关策略、代谢/ROS清除等)的联系。
- A novel betaine aldehyde dehydrogenase gene from Medicago sativa and its expression under salinity.(L. Amjad, H. Nosrati, F. Zaare, G. Dehghan, M. Husainpourfazi, S. Salehi, 2015, The Journal "Agriculture and Forestry")
- A betaine aldehyde dehydrogenase gene in quinoa (Chenopodium quinoa): structure, phylogeny, and expression pattern(Yurong Jiang, Shuijin Zhu, Junjie Yuan, Guolin Chen, Guoquan Lu, 2016, Genes & Genomics)
- Betaine Aldehyde Dehydrogenase (BADH) vs. Flavodoxin (Fld): Two Important Genes for Enhancing Plants Stress Tolerance and Productivity(M. Niazian, S. Sadat-Noori, M. Tohidfar, Seyed Mohammad Mehdi Mortazavian, P. Sabbatini, 2021, Frontiers in Plant Science)
- A betaine aldehyde dehydrogenase gene from Ammopiptanthus nanus enhances tolerance of Arabidopsis to high salt and drought stresses(Haoqiang Yu, Xia-Yu Zhou, Yingge Wang, Shufeng Zhou, F. Fu, Wanchen Li, 2017, Plant Growth Regulation)
- Betaine aldehyde dehydrogenase genes from Arabidopsis with different sub-cellular localization affect stress responses(T. Missihoun, Jessica Schmitz, Rebecca Klug, H. Kirch, D. Bartels, 2011, Planta)
- A betaine aldehyde dehydrogenase gene from Ammopiptanthus nanus enhances tolerance of Arabidopsis to high salt and drought stresses(Haoqiang Yu, Xia-Yu Zhou, Yingge Wang, Shufeng Zhou, F. Fu, Wanchen Li, 2017, Plant Growth Regulation)
- Characterization of a Drought-Induced Betaine Aldehyde Dehydrogenase Gene SgBADH from Suaeda glauca(Hangxia Jin, Mingyue Tang, Longming Zhu, Xiaomin Yu, Qinghua Yang, Xujun Fu, 2024, Plants)
- In silico analysis of betaine aldehyde dehydrogenase (BADH) gene in different cultivars of Chenopodium quinoa(Ali Reza Mirzaei, B. Fazeli-Nasab, M. Hatami, Ali Salehi Sardoei, M. Ghorbanpour, 2025, Functional & Integrative Genomics)
- The role of aldehyde dehydrogenases (ALDH) gene families in response to biotic and abiotic stress in plants(S. Giri, Sunil K. Nayak, Padmalochan Hembram, 2025, Proceedings of the Indian National Science Academy)
- The ALDH gene superfamily of Arabidopsis.(H. Kirch, D. Bartels, Yanling Wei, P. Schnable, A. Wood, 2004, Trends in Plant Science)
- The Involvement of Amino Acid Metabolism in the Mechanisms of Salt Tolerance Adaptation in Medicago sativa and Medicago truncatula(Sicong Shen, Ling Pan, Junhao Li, Jing Wang, Irshad Ahmad, Huhu Liu, Yuyu Bai, Bowen Kang, Juncheng Yin, Yang Gao, Yiwen Lu, Xiaoshan Wang, 2025, Plants)
BADH家族的比较基因组学与系统发育/分群(含进化与聚类证据)
该组文献的共同点是围绕BADH/AMADH/ALDH相关蛋白开展系统发育推断与家族分群:利用氨基酸序列相似性、进化树聚类等方式识别BADH家族成员并讨论其进化关系/分化模式,为紫花苜蓿BADH基因家族全基因组鉴定的分群提供“鉴定框架与可信分类依据”。
- A single base substitution in BADH/AMADH is responsible for fragrance in cucumber (Cucumis sativus L.), and development of SNAP markers for the fragrance(Chutintorn Yundaeng, P. Somta, S. Tangphatsornruang, S. Chankaew, P. Srinives, 2015, Theoretical and Applied Genetics)
- Genome-wide identification, characterization and evolutionary analysis of betaine aldehyde dehydrogenase (BADH), mitogen-activated protein kinase (MAPK) and sodium/hydrogen exchanger (NHX) genes in maize (Zea mays) under salt stress(Amaal Maghraby, Mohamed Alzalaty, 2024, Genetic Resources and Crop Evolution)
- Identification, characterization, and evolutionary analysis of aldehyde dehydrogenase (ALDH) genes superfamily in Medicago truncatula L(S. Allahi, Amin Abedi, H. H. Kumleh, M. Sohani, 2025, Genetica)
- Genome-wide identification, characterization and evolutionary analysis of betaine aldehyde dehydrogenase (BADH), mitogen-activated protein kinase (MAPK) and sodium/hydrogen exchanger (NHX) genes in maize (Zea mays) under salt stress(Amaal Maghraby, Mohamed Alzalaty, 2024, Genetic Resources and Crop Evolution)
- A betaine aldehyde dehydrogenase gene in quinoa (Chenopodium quinoa): structure, phylogeny, and expression pattern(Yurong Jiang, Shuijin Zhu, Junjie Yuan, Guolin Chen, Guoquan Lu, 2016, Genes & Genomics)
BADH基因成员的全基因组鉴定方法学范式(鉴定-结构-保守位点-表达)
这些研究虽然对象可能不局限于BADH(覆盖ALDH或其他基因家族),但研究套路高度一致:全基因组扫描获得家族成员数量;进行域/保守基序、基因结构、染色体分布与重复/共线性等结构特征分析;并结合转录组/qRT-PCR开展表达模式与胁迫响应验证。它们可作为“紫花苜蓿BADH家族全基因组鉴定”的方法学模板。
- Genome-wide characterization of the aldehyde dehydrogenase gene superfamily in soybean and its potential role in drought stress response(Wei Wang, Wei Jiang, Juge Liu, Yang Li, J. Gai, Yan Li, 2017, BMC Genomics)
- Genome-wide identification, phylogeny and expression analysis of the SPL gene family and its important role in salt stress in Medicago sativa L.(F. He, R. Long, Chunxue Wei, Yunxiu Zhang, Mingna Li, Junmei Kang, Qingchuan Yang, Zhen Wang, Lin Chen, 2022, BMC Plant Biology)
- Genome-wide identification and expression analysis of the Auxin-Response factor (ARF) gene family in Medicago sativa under abiotic stress(Fenqi Chen, Jinqing Zhang, Xue Ha, Huiling Ma, 2023, BMC Genomics)
- Enhancement of salt tolerance in alfalfa transformed with the gene encoding for betaine aldehyde dehydrogenase(Zihui Liu, Hong-Mei Zhang, Guo-liang Li, Xiulin Guo, S. Chen, Guizhen Liu, Yan-min Zhang, 2011, Euphytica)
与BADH/ALDH作用网络相联系的胁迫响应调控与分子网络证据(共表达/转录调控/代谢通路)
该组强调BADH相关胁迫表型背后的调控网络与通路层证据:例如通过GWAS/调控因子鉴定、代谢/转录组与蛋白组富集、以及共功能基因网络来解释BADH在胁迫适应中的上下游关联。其共同点是从“网络/通路”角度支撑BADH基因家族功能推断,而非仅做单基因层面的鉴定。
- Volatilome-based GWAS identifies OsWRKY19 and OsNAC021 as key regulators of rice aroma.(Yan Li, Yuanyuan Miao, Honglun Yuan, F. Huang, Mingqi Sun, Liqiang He, Xianqing Liu, Jie Luo, 2024, Molecular Plant)
- The Involvement of Amino Acid Metabolism in the Mechanisms of Salt Tolerance Adaptation in Medicago sativa and Medicago truncatula(Sicong Shen, Ling Pan, Junhao Li, Jing Wang, Irshad Ahmad, Huhu Liu, Yuyu Bai, Bowen Kang, Juncheng Yin, Yang Gao, Yiwen Lu, Xiaoshan Wang, 2025, Plants)
- Genome-wide identification, characterization and evolutionary analysis of betaine aldehyde dehydrogenase (BADH), mitogen-activated protein kinase (MAPK) and sodium/hydrogen exchanger (NHX) genes in maize (Zea mays) under salt stress(Amaal Maghraby, Mohamed Alzalaty, 2024, Genetic Resources and Crop Evolution)
- Genome-wide identification and expression analysis of the Auxin-Response factor (ARF) gene family in Medicago sativa under abiotic stress(Fenqi Chen, Jinqing Zhang, Xue Ha, Huiling Ma, 2023, BMC Genomics)
紫花苜蓿(与多年生豆科)胁迫适应研究背景:为BADH功能优先级提供遗传与转录证据
这些研究聚焦于紫花苜蓿或豆科作物在盐/旱等非生物胁迫下的基因家族鉴定与表达谱/调控元件特征。虽然不都直接是BADH,但为在苜蓿全基因组鉴定BADH时如何结合胁迫响应时空表达、启动子顺式元件(如ABRE等)、以及胁迫相关基因家族的对照与优先级筛选提供生物学背景与可比框架。
- Genome-wide identification, phylogeny and expression analysis of the SPL gene family and its important role in salt stress in Medicago sativa L.(F. He, R. Long, Chunxue Wei, Yunxiu Zhang, Mingna Li, Junmei Kang, Qingchuan Yang, Zhen Wang, Lin Chen, 2022, BMC Plant Biology)
- Genome-wide identification and expression analysis of the Auxin-Response factor (ARF) gene family in Medicago sativa under abiotic stress(Fenqi Chen, Jinqing Zhang, Xue Ha, Huiling Ma, 2023, BMC Genomics)
- Genome-Wide Identification and Expression Profiling of the GRAS Gene Family in Taxus cuspidate(Li Gao, Aokun Shi, Mian Wang, Hui Tian, Yanwen Zhang, 2025, Genes)
- Genome-wide identification and expression analysis of the Auxin-Response factor (ARF) gene family in Medicago sativa under abiotic stress(Fenqi Chen, Jinqing Zhang, Xue Ha, Huiling Ma, 2023, BMC Genomics)
- Genome-wide identification of the GRF family in sweet orange (Citrus sinensis) and functional analysis of the CsGRF04 in response to multiple abiotic stresses(Mingjia Fu, Ying He, Xiaoyue Yang, Xi Tang, Min Wang, Wenying Dai, 2024, BMC Genomics)
- Genome-wide identification and expression pattern analysis under drought stress of PHD family genes in alfalfa (Medicago sativa)(Bei Wu, Shangli Shi, Wenjuan Kang, Yilin Han, 2025, BMC Genomics)
基于所给文献可将“紫花苜蓿BADH基因家族全基因组鉴定”所需证据链组织为五类:①BADH/ALDH在甜菜碱醛-甜菜碱(GB)途径中的生化与胁迫生理功能;②BADH家族的比较系统发育与分群/进化证据;③全基因组鉴定的通用方法学(域/基序、结构、染色体与表达验证);④与BADH相关的调控网络与代谢/共表达通路证据;⑤以苜蓿/豆科胁迫响应为背景的表达与调控元件研究,用于增强BADH候选基因在胁迫响应中的优先级判断。
总计26篇相关文献
… Alfalfa (Medicago sativa L.) is a crucial leguminous forage crop because it is rich in nutrition and protein. The protein content of alfalfa is as high as 17–20% on a dry matter basis. This …
… Figure 8: The dendrogram showing similarity between amino acid sequences of MsBD1 reported in this study from Medicago sativa cv. Gara-Yonjeh and BADH genes of several plant …
… In soybean ALDH genes (GmALDHs) identified 51 members, grouped into 10 ALDH families through phylogenetic analysis and gene … Aldehyde Dehydrogenase (BADH) gene, which …
Alfalfa (Medicago sativa L.) is a high-nutritive-value forage crop that provides livestock with abundant protein and essential nutrients. Breeding elite cultivars with superior quality has become a major goal in modern alfalfa improvement. This study systematically evaluated 12 quality-related traits under field conditions using a diverse panel of 176 alfalfa accessions and investigated the genetic basis underlying these traits. Phenotypic analysis revealed variability across all traits, with coefficients of variation ranging from 2.56% to 15.72%. Based on multi-trait clustering analysis, 16 accessions with overall superior quality were identified. Genome-wide association studies (GWAS) detected 45 significant single nucleotide polymorphisms (SNPs) and 12 structural variants (SVs). Within the associated genomic regions, eight candidate genes were prioritized. RT-qPCR validation indicated that three of these genes (Msa.H.0301430, Msa.H.0290550, and Msa.H.0313490) negatively regulate quality traits, while one gene (Msa.H.0479570) acts as a positive regulator. Haplotype analysis further revealed a positive correlation between the number of favorable haplotypes and phenotypic performance. Genomic prediction (GP) achieved accuracies ranging from 0.71 to 0.86 for the traits when incorporating the top 5000 SNPs identified from GWAS. This study provides valuable insights into the genetic architecture of quality-related traits in alfalfa and lays a solid foundation for future molecular design breeding.
BACKGROUND: Alfalfa (Medicago sativa) is a perennial high-quality legume forage widely cultivated worldwide, but drought stress severely restrict its growth and development. Plant homeodomain finger (PHD) family genes are a type of zinc finger transcription factors widely distributed in eukaryotes. They act as histone code identifier to regulate the expression of downstream genes and play important biological roles in plant growth, development, and stress response. However, information about the PHD family genes in alfalfa remains limited at present. RESULTS: We identified 56 MsPHD genes containing 67 PHD domains in the alfalfa, and these genes were unevenly distributed on 8 chromosomes of alfalfa. There are 9 pairs of gene fragment duplicates in the MsPHD family. The 56 MsPHD genes are evolutionarily divided into 14 subgroups. There are differences in the conservative motifs and gene structure composition patterns of MsPHD among different subgroups. In addition, we identified 11 MsPHD genes related to drought stress, and their promoter regions all contained elements related to stress response. Quantitative Real-time PCR (QRT-PCR) further verified that the expression levels of these 11 MsPHD genes were significantly up-regulated in both roots and leaves, with MsPHD9 showing the highest upregulation. 57.14% of MsPHD proteins were predicted to be located in the nucleus, and the co-localization analysis of MsPHD9 protein confirmed that it was primarily located in the nucleus. CONCLUSIONS: The identification of alfalfa PHD family genes not only provides important genetic resources for in-depth analysis of the molecular mechanism of alfalfa drought resistance, but also lays a foundation for creating new germplasm of alfalfa with strong drought resistance through genetic engineering technology.
… In this study, a bioinformatics analysis of the Medicago truncatula genome identified 27 MtALDHs, which were classified into ten distinct groups based on their phylogenetic relationships…
BACKGROUND: has yet to be conducted. METHODS: genes were identified and characterized through genome-wide analysis. RESULTS: genes were highly expressed in paclitaxel-accumulating organs such as roots, stems, and bark-particularly TcGRAS6, TcGRAS13, and TcGRAS24-suggesting their putative involvement in paclitaxel biosynthesis through hormone-mediated regulatory pathways. Co-expression network analysis further identified TcGRAS13 and TcGRAS14 as central nodes within the transcriptional regulatory network. CONCLUSIONS: , thereby establishing a theoretical framework and providing valuable candidate gene resources for elucidating their biological functions and regulatory roles in secondary metabolism, particularly in paclitaxel biosynthesis.
Plant melatonin is widely recognized as a pleiotropic regulator. As a growth-regulating hormone, it extensively participates in various growth and developmental processes and has significant functions in stress responses and disease resistance. Plant melatonin is synthesized primarily through the catalytic actions of five enzymes: TDC (tryptophan decarboxylase), T5H (tryptamine-5-hydroxylase), SNAT (serotonin N-acetyltransferase), ASMT (N-acetylserotonin methyltransferase), and COMT (caffeic acid-O-methyltransferase). There are multiple genes for each of these five enzymes in citrus genomes, however, with the exception of COMT5—whose function has recently been elucidated—and SNAT, which has only been preliminarily identified, the remaining genes have not been unequivocally characterized or functionally annotated. Hence, we carried out a genome-wide analysis of melatonin biosynthesis enzyme-related gene families in trifoliate orange (Poncirus trifoliata), one of the most common citrus rootstock varieties. Through bioinformatics approaches, we identified 96 gene family members encoding melatonin biosynthetic enzymes and characterized their protein sequence properties, phylogenetic relationships, gene structures, chromosomal distributions, and promoter cis-acting elements. Furthermore, by analyzing expression patterns in different tissues and under various stresses, we identified multiple stress-responsive melatonin synthase genes. These genes likely participate in melatonin synthesis under adverse conditions, thereby enhancing stress adaptation. Specifically, PtCOMT5, PtASMT11, and PtTDC9 were significantly induced by low temperature; PtSNAT1, PtSNAT14, PtSNAT18, and PtTDC10 were markedly responsive to drought; and PtASMT15, PtSNAT15, PtASMT16, and PtSNAT3 were strongly induced by ABA. Among them, PtASMT23 expression was induced up to 120-fold under low temperature, while PtSNAT18 showed over 100-fold upregulation under dehydration treatment. These findings strongly suggest that PtASMT23 and PtSNAT18 play critical roles in regulating melatonin biosynthesis in response to cold and drought stress, respectively. Collectively, these findings pinpoint novel genetic targets for enhancing stress resilience in citrus breeding programs and lay the foundation for the functional characterization of specific melatonin biosynthesis pathway gene family members in citrus and other horticultural crop species.
Background The Na⁺/H⁺ antiporter (NHX) family plays a crucial role in regulating intracellular Na and H homeostasis in plants. This study conducted a genome-wide analysis and expression assessment of peanut NHXs under different stress conditions. Results Fourteen AhNHXs were identified based on the Na⁺/H⁺ exchange domain, and all contained the amiloride-binding site that inhibits Na+ transport in plants. Phylogenetic analysis grouped these genes into three subfamilies. Cis-regulatory element analysis identified elements associated with hormone signaling, stress responses, and tissue-specific expression. qRT-PCR results indicated their roles in salt stress, selenium stress, and tolerance to metal ion toxicity such as cadmium, manganese, and aluminum. For instance, AhNHX4, AhNHX5, and AhNHX7 were upregulated in roots under salt, cadmium, and aluminum treatments, whereas AhNHX7 was downregulated in roots under selenium and manganese stress and in leaves under all stress conditions. Conclusions This study examined the evolutionary, structural, and functional characteristics of the AhNHX family and highlighted their roles in multiple stress responses in peanut. These findings provide insight into potential applications for improving crop tolerance to abiotic stress. Supplementary Information The online version contains supplementary material available at 10.1186/s12870-026-08590-y.
Aromatic rice is globally favored for its distinctive scent, not only increasing nutritional value but also enhancing economic importance. However, apart from 2-acetyl-1-pyrroline (2-AP), the metabolic basis of aroma remains elusive, and the genetic underlying of the accumulation of fragrance metabolites are largely unknown. Here, we revealed 2-AP and fatty acid-derived volatile metabolites (FAVs) as key contributors to rice aroma by combining aroma rating with molecular docking. Using volatilome-based GWAS, we identified two regulatory genes that determine the natural variation of these fragrance metabolites. We demonstrated that OsWRKY19 not only enhances fragrance by negatively regulating OsBADH2 but also promotes agricultural traits in rice. Additionally, we revealed OsNAC021 that negatively regulates FAVs through the LOX pathway, and the knockout of it resulted in the over-accumulation of grain FAVs without a yield penalty. Our findings provide a compelling example of deciphering the genetic regulatory mechanisms underlying rice fragrance and pave the way for the creation of aromatic rice varieties.
Background Citrus is one of the most valuable fruits worldwide and an economic pillar industry in southern China. Nevertheless, it frequently suffers from undesirable environmental stresses during the growth cycle, which severely restricts the growth, development and yield of citrus. In plants, the growth-regulating factor (GRF) family of transcription factors (TF) is extensively distributed and plays an vital part in plant growth and development, hormone response, as well as stress adaptation. However, the systematic identification and functional analysis of GRF TFs in citrus have not been reported. Results Here, a genome-wide identification of GRF TFs was performed in Citrus sinensis , 9 members of CsGRFs were systematically identified and discovered to be scattered throughout 5 chromosomes. Subsequently, physical and chemical properties, phylogenetic relationships, structural characteristics, gene duplication events, collinearity and cis -elements of promoter were elaborately analyzed. In particular, the expression patterns of the CsGRF genes in response to multiple phytohormone and abiotic stress treatments were investigated. Predicated on this result, CsGRF04 , which exhibited the most differential expression pattern under multiple phytohormone and abiotic stress treatments was screened out. Virus-induced gene silencing (VIGS) technology was utilized to obtain gene silenced plants for CsGRF04 successfully. After the three stress treatments of high salinity, low temperature and drought, the CsGRF04 -VIGS lines showed significantly reduced resistance to high salinity and low temperature stresses, but extremely increased resistance to drought stress. Conclusions Taken together, our findings systematically analyzed the genomic characterization of GRF family in Citrus sinensis , and excavated a CsGRF04 with potential functions under multiple abiotic stresses. Our study lay a foundation for further study on the function of CsGRFs in abiotic stress and hormone signaling response.
The resistance (R) gene family in plants is a vital component of the plant defense system, enabling host resistance against pathogens through interactions with pathogen effector proteins. These R genes often encode nucleotide-binding (NB-ARC or N) and leucine-rich-repeat (LRR or L) domains, collectively forming the NLR protein family. The NLR proteins have been widely explored in crops from Poaceae and Brassicaceae, but limited studies are available for crops in other families, including Fabaceae. To address this gap, we conducted a comprehensive genome-wide analysis of putative NLR proteins in nine Fabaceae crops, including Glycine max, Lupinus angustifolius, Medicago truncatula, Pisum sativum, Phaseolus vulgaris, Trifolium pratense, Vigna angularis, Vigna radiata, and Vigna unguiculata. Our study revealed a substantial variation in the number of NLR proteins, independent of genome size. Notably, the NB-ARC domain exhibited a preferential co-occurrence with a specific LRR domain (IPR001611) in Fabaceae. Furthermore, through protein signature analysis, we identified both species-specific and shared domains across the nine crops. By classifying the identified proteins into seven distinct classes (N, L, CN, TN, NL, CNL, and TNL), we observed species-specific clustering within the CN, TN, and CNL classes, reflecting the diversification of species within Fabaceae. This genome-wide study enhances our understanding of the NLR protein repertoire and comprehensive protein signatures in nine Fabaceae species and provides valuable insights into plant defense mechanisms.
Amino acid metabolism constitutes a major metabolic pathway in plants, playing an important role in the modulation of plant responses to stress. In this study, we investigated the amino acid metabolism responses of M. sativa (Medicago sativa L.) and M. truncatula (Medicago truncatula L.) plants under salt stress using transcriptomic and proteomic approaches to elucidate their salt stress tolerance mechanisms in relation to the regulation of amino acid homeostasis. Transcriptome and proteome sequencing followed by Kyoto Gene and Genome Encyclopedia enrichment analysis revealed 34 differentially expressed genes and 45 differentially expressed proteins involved in valine, leucine, and isoleucine degradation, tyrosine metabolism, and glutathione metabolism. Significant differences were observed in the expression of glutathione S-transferase (GST) within the glutathione metabolic pathway between M. sativa and M. truncatula. The induction of valine, leucine, and isoleucine metabolism, aldehyde dehydrogenases (ALDHs), and alanine-glyoxylate aminotransferases (AGXTs), involved in intracellular reactive oxygen species scavenging, also significantly differed under salt stress. Significant differences were identified in the expression of tyrosine decarboxylases (TDCs) involved in tyrosine metabolism, which are responsible for tyramine biosynthesis and can enhance plant tolerance to salt stress. This study delved into the effects of amino acid metabolism on the salt tolerance mechanisms of M. sativa and M. truncatula, which is crucial in guiding the future breeding of salt-tolerant alfalfa varieties.
Abiotic stresses, mainly salinity and drought, are the most important environmental threats that constrain worldwide food security by hampering plant growth and productivity. Plants cope with the adverse effects of these stresses by implementing a series of morpho-physio-biochemical adaptation mechanisms. Accumulating effective osmo-protectants, such as proline and glycine betaine (GB), is one of the important plant stress tolerance strategies. These osmolytes can trigger plant stress tolerance mechanisms, which include stress signal transduction, activating resistance genes, increasing levels of enzymatic and non-enzymatic antioxidants, protecting cell osmotic pressure, enhancing cell membrane integrity, as well as protecting their photosynthetic apparatus, especially the photosystem II (PSII) complex. Genetic engineering, as one of the most important plant biotechnology methods, helps to expedite the development of stress-tolerant plants by introducing the key tolerance genes involved in the biosynthetic pathways of osmolytes into plants. Betaine aldehyde dehydrogenase (BADH) is one of the important genes involved in the biosynthetic pathway of GB, and its introduction has led to an increased tolerance to a variety of abiotic stresses in different plant species. Replacing down-regulated ferredoxin at the acceptor side of photosystem I (PSI) with its isofunctional counterpart electron carrier (flavodoxin) is another applicable strategy to strengthen the photosynthetic apparatus of plants under stressful conditions. Heterologous expression of microbially-sourced flavodoxin (Fld) in higher plants compensates for the deficiency of ferredoxin expression and enhances their stress tolerance. BADH and Fld are multifunctional transgenes that increase the stress tolerance of different plant species and maintain their production under stressful situations by protecting and enhancing their photosynthetic apparatus. In addition to increasing stress tolerance, both BADH and Fld genes can improve the productivity, symbiotic performance, and longevity of plants. Because of the multigenic and complex nature of abiotic stresses, the concomitant delivery of BADH and Fld transgenes can lead to more satisfying results in desired plants, as these two genes enhance plant stress tolerance through different mechanisms, and their cumulative effect can be much more beneficial than their individual ones. The importance of BADH and Fld genes in enhancing plant productivity under stress conditions has been discussed in detail in the present review.
… betaine (GB), although its genome contains two genes, ALDH10A8 and ALDH10A9 that code for betaine aldehyde dehydrogenases (… enzyme was shown to oxidize betaine aldehyde, 4-…
… These results suggest that the AnBADH gene encodes a functional betaine aldehyde dehydrogenase, and plays a critical role in the adaptation of A. nanus to its harsh habitat. It …
Drought and high salinity are two major abiotic factors that restrict the productivity of alfalfa. By application of the Agrobacterium-mediated transformation method, an oxidative responsive gene, CsALDH12A1, from the desert grass Cleistogenes songorica together with the bar gene associated with herbicide resistance, were co-transformed into alfalfa (Medicago sativa L.). From the all 90 transformants, 16 were positive as screened by spraying 1 mL L-1 10% Basta solution and molecularly diagnosis using PCR. Real-time PCR analysis indicated that drought and salt stress induced high CsALDH expression in the leaves of the transgenic plants. The CsALDH expression levels under drought (15 d) and salt stress (200 mM NaCl) were 6.11 and 6.87 times higher than in the control plants, respectively. In comparison to the WT plants, no abnormal phenotypes were observed among the transgenic plants, which showed significant enhancement of tolerance to 15 d of drought and 10 d of salinity treatment. Evaluation of the physiological and biochemical indices during drought and salt stress of the transgenic plants revealed relatively lower Na+ content and higher K+ content in the leaves relative to the WT plants, a reduction of toxic on effects and maintenance of osmotic adjustment. In addition, the transgenic plants could maintain a higher relative water content level, higher shoot biomass, fewer changes in the photosystem, decreased membrane injury, and a lower level of osmotic stress. These results indicate that the co-expression of the introduced bar and CsALDH genes enhanced the herbicide, drought and salt tolerance of alfalfa and therefore can potentially be used as a novel genetic resource for the future breeding programs to develop new cultivars.
SQUAMOSA promoter-binding protein-like (SPL) transcription factors are widely present in plants and are involved in signal transduction, the stress response and development. The SPL gene family has been characterized in several model species, such as A. thaliana and G. max. However, there is no in-depth analysis of the SPL gene family in forage, especially alfalfa (Medicago sativa L.), one of the most important forage crops worldwide. In total, 76 putative MsSPL genes were identified in the alfalfa genome with an uneven distribution. Based on their identity and gene structure, these MsSPLs were divided into eight phylogenetic groups. Seventy-three MsSPL gene pairs arose from segmental duplication events, and the MsSPLs on the four subgenomes of individual chromosomes displayed high collinearity with the corresponding M. truncatula genome. The prediction of the cis-elements in the promoter regions of the MsSPLs detected two copies of ABA (abscisic acid)-responsive elements (ABREs) on average, implying their potential involvement in alfalfa adaptation to adverse environments. The transcriptome sequencing of MsSPLs in roots and leaves revealed that 54 MsSPLs were expressed in both tissues. Upon salt treatment, three MsSPLs (MsSPL17, MsSPL23 and MsSPL36) were significantly regulated, and the transcription level of MsSPL36 in leaves was repressed to 46.6% of the control level. In this study, based on sequence homology, we identified 76 SPL genes in the alfalfa. The SPLs with high identity shared similar gene structures and motifs. In total, 71.1% (54 of 76) of the MsSPLs were expressed in both roots and leaves, and the majority (74.1%) preferred underground tissues to aerial tissues. MsSPL36 in leaves was significantly repressed under salt stress. These findings provide comprehensive information regarding the SPB-box gene family for improve alfalfa tolerance to high salinity.
BACKGROUND: Alfalfa (Medicago sativa) is the most widely planted legume forage and one of the most economically valuable crops in the world. The periodic changes in its growth and development and abiotic stress determine its yield and economic benefits. Auxin controls many aspects of alfalfa growth by regulating gene expression, including organ differentiation and stress response. Auxin response factors (ARF) are transcription factors that play an essential role in auxin signal transduction and regulate the expression of auxin-responsive genes. However, the function of ARF transcription factors is unclear in autotetraploid-cultivated alfalfa. RESULT: A total of 81 ARF were identified in the alfalfa genome in this study. Gene Ontology (GO) terms and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways were analyzed, identifying that ARF genes are mainly involved in transcriptional regulation and plant hormone signal transduction pathways. Phylogenetic analysis showed that MsARF was divided into four clades: I, II, III, and IV, each containing 52, 13, 7, and 9 genes, respectively. The promoter region of the MsARF gene contained stress-related elements, such as ABRE, TC-rich repeats, MBS, LTR. Proteins encoded by 50 ARF genes were localized in the nucleus without guide peptides, signal peptides, or transmembrane structures, indicating that most MsARF genes are not secreted or transported but only function in the nucleus. Protein structure analysis revealed that the secondary and tertiary structures of the 81 MsARF genes varied. Chromosomal localization analysis showed 81 MsARF genes were unevenly distributed on 25 chromosomes, with the highest distribution on chromosome 5. Furthermore, 14 segmental duplications and two sets of tandem repeats were identified. Expression analysis indicated that the MsARF was differentially expressed in different tissues and under various abiotic stressors. The quantitative reverse transcription polymerase chain reaction (qRT-PCR) analysis showed that the expression profiles of 23 MsARF genes were specific to abiotic stresses such as drought, salt, high temperature, and low temperature, as well as tissue-specific and closely related to the duration of stress. CONCLUSION: This study identified MsARF in the cultivated alfalfa genome based on the autotetraploid level, which GO, KEGG analysis, phylogenetic analysis, sequence characteristics, and expression pattern analysis further confirmed. Together, these findings provide clues for further investigation of MsARF functional verification and molecular breeding of alfalfa. This study provides a novel approach to systematically identify and characterize ARF transcription factors in autotetraploid cultivated alfalfa, revealing 23 MsARF genes significantly involved in response to various stresses.
… The gene is also crucial for activating nuclear transcription factors through receptor activation. In conclusion, the results suggest that BADH genes … One important gene family that plays a …
… These results indicate that the Arabidopsis ALDH3 gene family members might have evolved as a consequence of functional specialization in different tissues and subcellular …
Betaine aldehyde dehydrogenases (BADHs) are key enzymes in the biosynthesis of glycine betaine, which is an important organic osmolyte that maintains cell structure and improves plant tolerance to abiotic stresses, especially in halotolerant plants. Improving the drought tolerance of crops will greatly increase their yield. In this study, a novel BADH gene named SgBADH from Suaeda glauca was induced by drought stress or abscisic acid. To explore the biological function of SgBADH, the SgBADH gene was transformed into Arabidopsis. Then, we found SgBADH-overexpressing Arabidopsis seedlings showed enhanced tolerance to drought stress. SgBADH transgenic Arabidopsis seedlings also had longer roots compared with controls under drought stress, while SgBADH-overexpressing Arabidopsis exhibited increased glycine betaine accumulation and decreased malondialdehyde (MDA) under drought stress. Our results suggest that SgBADH might be a positive regulator in plants during the response to drought.
… in coding regions of BADH genes from three Amaranthaceae … plant species (cotton, Arabidopsis and rice) revealed that … in all of BADH genes, suggesting that the ancestral BADH gene …
Betaine aldehyde dehydrogenase (BADH), mitogen-activated protein kinase (MAPK) and sodium/hydrogen exchanger (NHX) play important roles in the response to salt stress. This is the first study to identify the BADH and NHX genes in maize (Zea mays) via genome-wide analysis. The qRT‒PCR results indicated that ZmNHX was upregulated by 4.38-fold, while a significant difference was not observed in ZmBADH or ZmMAPK, with fold changes of 0.96 and 1.06, respectively, under salinity stress. Genome-wide analysis revealed 8 ZmBADH, 19 ZmMAPK and 11 ZmNHX proteins in Z. mays. Domain analysis confirmed the presence of the aldehyde dehydrogenase superfamily (ALDH-SF), protein kinase and Na_H_Exchanger domains in the ZmBADH, ZmMAPK and ZmNHX proteins, respectively. Motif analysis indicated that the phylogenetic relationships were similar to the conserved motif distributions within the clade. The Ka/Ks ratio indicated that the ZmBADH, ZmMAPK and ZmNHX genes were influenced primarily by purifying selection. This study provides comprehensive identification, characterization, and evolutionary analysis for a better understanding of the ZmBADH, ZmMAPK and ZmNHX genes in maize.
Aldehyde dehydrogenases (ALDHs) represent a group of enzymes that detoxify aldehydes by facilitating their oxidation to carboxylic acids, and have been shown to play roles in plant response to abiotic stresses. However, the comprehensive analysis of ALDH superfamily in soybean (Glycine max) has been limited. In present study, a total of 53 GmALDHs were identified in soybean, and grouped into 10 ALDH families according to the ALDH Gene Nomenclature Committee and phylogenetic analysis. These groupings were supported by their gene structures and conserved motifs. Soybean ALDH superfamily expanded mainly by whole genome duplication/segmental duplications. Gene network analysis identified 1146 putative co-functional genes of 51 GmALDHs. Gene Ontology (GO) enrichment analysis suggested the co-functional genes of these 51 GmALDHs were enriched (FDR < 1e-3) in the process of lipid metabolism, photosynthesis, proline catabolism, and small molecule catabolism. In addition, 22 co-functional genes of GmALDHs are related to plant response to water deprivation/water transport. GmALDHs exhibited various expression patterns in different soybean tissues. The expression levels of 13 GmALDHs were significantly up-regulated and 14 down-regulated in response to water deficit. The occurrence frequencies of three drought-responsive cis-elements (ABRE, CRT/DRE, and GTGCnTGC/G) were compared in GmALDH genes that were up-, down-, or non-regulated by water deficit. Higher frequency of these three cis-elements was observed for the group of up-regulated GmALDH genes as compared to the group of down- or non- regulated GmALDHs by drought stress, implying their potential roles in the regulation of soybean response to drought stress. A total of 53 ALDH genes were identified in soybean genome and their phylogenetic relationships and duplication patterns were analyzed. The potential functions of GmALDHs were predicted by analyses of their co-functional gene networks, gene expression profiles, and cis-regulatory elements. Three GmALDH genes, including GmALDH3H2, GmALDH12A2 and GmALDH18B3, were highly induced by drought stress in soybean leaves. Our study provides a foundation for future investigations of GmALDH gene function in soybean.
… Phylogenetics of CsBADH Phylogenetic analysis was performed to determine the … The phylogenetic tree revealed two major clusters of plant BADHs/AMADHs, each cluster belonged to …
基于所给文献可将“紫花苜蓿BADH基因家族全基因组鉴定”所需证据链组织为五类:①BADH/ALDH在甜菜碱醛-甜菜碱(GB)途径中的生化与胁迫生理功能;②BADH家族的比较系统发育与分群/进化证据;③全基因组鉴定的通用方法学(域/基序、结构、染色体与表达验证);④与BADH相关的调控网络与代谢/共表达通路证据;⑤以苜蓿/豆科胁迫响应为背景的表达与调控元件研究,用于增强BADH候选基因在胁迫响应中的优先级判断。