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Chen K, Hu Q, Ma X, Zhang X, Qian R, Zheng J. The effect of exogenous melatonin on waterlogging stress in Clematis. FRONTIERS IN PLANT SCIENCE 2024; 15:1385165. [PMID: 38957603 PMCID: PMC11217522 DOI: 10.3389/fpls.2024.1385165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Accepted: 05/30/2024] [Indexed: 07/04/2024]
Abstract
Clematis is the queen of the vines, being an ornamental plant with high economic value. Waterlogging stress reduces the ornamental value of the plant and limits its application. Melatonin plays an important role in plant resistance to abiotic stresses. In this study, the physiological responses and gene expression levels of two wild species, namely, Clematis tientaiensis and Clematis lanuginosa, and two horticultural varieties, namely, 'Sen-No-Kaze' and 'Viva Polonia,' under waterlogging stress were analyzed to determine the effect of melatonin on waterlogging tolerance. The results showed that the waterlogging tolerances of C. lanuginosa and 'Sen-No-Kaze' were relatively poor, but were significantly improved by concentrations of 100 μmol·L-1 and 50 μmol·L-1 melatonin. C. tientaiensis and 'Viva Polonia' had relatively strong tolerance to waterlogging, and this was significantly improved by 200 μmol·L-1 melatonin. Under waterlogging stress, the relative conductivity and H2O2 content of Clematis increased significantly; the photosynthetic parameters and chlorophyll contents were significantly decreased; photosynthesis was inhibited; the contents of soluble protein and soluble sugars were decreased. Effective improvement of waterlogging tolerance after exogenous melatonin spraying, the relative conductivity was decreased by 4.05%-27.44%; the H2O2 content was decreased by 3.84%-23.28%; the chlorophyll content was increased by 35.59%-103.36%; the photosynthetic efficiency was increased by 25.42%-45.86%; the antioxidant enzyme activities of APX, POD, SOD, and CAT were increased by 28.03%-158.61%; the contents of proline, soluble protein, and soluble sugars were enhanced, and cell homeostasis was improved. Transcription sequencing was performed on wild Clematis with differences in waterlogging tolerance, and nine transcription factors were selected that were highly correlated with melatonin and that had the potential to improve waterlogging tolerance, among which LBD4, and MYB4 were significantly positively correlated with the antioxidant enzyme system, and bHLH36, DOF36, and WRKY4 were significantly negatively correlated. Photosynthetic capacity was positively correlated with DOF36 and WRKY4 while being significantly negatively correlated with MYB4, MOF1, DOF47, REV1 and ABR1. Melatonin could enhance the flooding tolerance of Clematis by improving photosynthetic efficiency and antioxidant enzyme activity. This study provides an important basis and reference for the application of melatonin in waterlogging-resistant breeding of Clematis.
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Affiliation(s)
- Kai Chen
- College of Landscape Architecture, Zhejiang A & F University, Hangzhou, China
- Wenzhou Key laboratory of Resource Plant Innovation and Utilization, Institute of Subtropical Crops, Zhejiang Academy of Agricultural Sciences, Wenzhou, China
| | - Qingdi Hu
- Wenzhou Key laboratory of Resource Plant Innovation and Utilization, Institute of Subtropical Crops, Zhejiang Academy of Agricultural Sciences, Wenzhou, China
| | - Xiaohua Ma
- Wenzhou Key laboratory of Resource Plant Innovation and Utilization, Institute of Subtropical Crops, Zhejiang Academy of Agricultural Sciences, Wenzhou, China
| | - Xule Zhang
- Wenzhou Key laboratory of Resource Plant Innovation and Utilization, Institute of Subtropical Crops, Zhejiang Academy of Agricultural Sciences, Wenzhou, China
| | - Renjuan Qian
- Wenzhou Key laboratory of Resource Plant Innovation and Utilization, Institute of Subtropical Crops, Zhejiang Academy of Agricultural Sciences, Wenzhou, China
| | - Jian Zheng
- Wenzhou Key laboratory of Resource Plant Innovation and Utilization, Institute of Subtropical Crops, Zhejiang Academy of Agricultural Sciences, Wenzhou, China
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Teoh EY, Teo CH, Baharum NA, Tan BC. Expressing banana transcription factor MaERFVII3 in Arabidopsis confers enhanced waterlogging tolerance and root growth. PeerJ 2024; 12:e17285. [PMID: 38708359 PMCID: PMC11067909 DOI: 10.7717/peerj.17285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Accepted: 04/01/2024] [Indexed: 05/07/2024] Open
Abstract
Background Waterlogging poses a significant threat to plant growth and yield worldwide. Identifying the genes responsible for mitigating waterlogging stress is crucial. Ethylene-responsive factors (ERFs) are transcriptional regulators that respond to various biotic and abiotic stresses in plants. However, their roles and involvement in responding to waterlogging stress remain largely unexplored. Hence, this study aimed to elucidate the role of ERFs in enhancing banana plant resilience to waterlogging. Methods We hypothesized that introducing a group VII ERF transcription factor in Arabidopsis could enhance waterlogging stress tolerance. To test this hypothesis, we isolated MaERFVII3 from banana roots, where it exhibited a significant induction in response to waterlogging stress. The isolated MaERFVII3 was introduced into Arabidopsis plants for functional gene studies. Results Compared with wild-type plants, the MaERFVII3-expressing Arabidopsis showed increased survival and biomass under waterlogging stress. Furthermore, the abundance of transcripts related to waterlogging and hypoxia response showed an elevation in transgenic plants but a decrease in wild-type and empty vector plants when exposed to waterlogging stress. Our results demonstrate the significant contribution of MaERFVII3 to waterlogging tolerance in Arabidopsis, providing baseline data for further exploration and potentially contributing to crop improvement programs.
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Affiliation(s)
- Ee Yang Teoh
- Centre for Research in Biotechnology for Agriculture, Universiti Malaya, Kuala Lumpur, Malaysia
- Institute for Advanced Studies, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Chee How Teo
- Centre for Research in Biotechnology for Agriculture, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Nadiya Akmal Baharum
- Department of Cell and Molecular Biology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, UPM Serdang, Selangor, Malaysia
| | - Boon Chin Tan
- Centre for Research in Biotechnology for Agriculture, Universiti Malaya, Kuala Lumpur, Malaysia
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Chugh V, Mishra V, Sharma V, Kumar M, Ghorbel M, Kumar H, Rai A, Kumar R. Deciphering Physio-Biochemical Basis of Tolerance Mechanism for Sesame ( Sesamum indicum L.) Genotypes under Waterlogging Stress at Early Vegetative Stage. PLANTS (BASEL, SWITZERLAND) 2024; 13:501. [PMID: 38498414 PMCID: PMC10892085 DOI: 10.3390/plants13040501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 02/06/2024] [Accepted: 02/07/2024] [Indexed: 03/20/2024]
Abstract
Waterlogging represents a substantial agricultural concern, inducing harmful impacts on crop development and productivity. In the present study, 142 diverse sesame genotypes were examined during the early vegetative phase to assess their response under waterlogging conditions. Based on the severity of symptoms observed, 2 genotypes were classified as highly tolerant, 66 as moderately tolerant, 69 as susceptible, and 5 as highly susceptible. Subsequent investigation focused on four genotypes, i.e., two highly tolerant (JLT-8 and GP-70) and two highly susceptible (R-III-F6 and EC-335003). These genotypes were subjected to incremental stress periods (0 h, 24 h, 48 h, 72 h, and 96 h) to elucidate the biochemical basis of tolerance mechanisms. Each experiment was conducted as a randomized split-plot design with three replications, and the statistical significance of the treatment differences was determined using the one-way analysis of variance (ANOVA) followed by the Fisher least significant difference (LSD) test at p ≤ 0.05. The influence of waterlogging stress on morphological growth was detrimental for both tolerant and susceptible genotypes, with more severe consequences observed in the latter. Although adventitious roots were observed in both sets of genotypes above flooding levels, the tolerant genotypes exhibited a more rapid and vigorous development of these roots after 48 h of stress exposure. Tolerant genotypes displayed higher tolerance coefficients compared to susceptible genotypes. Furthermore, tolerant genotypes maintained elevated antioxidant potential, thereby minimizing oxidative stress. Conversely, susceptible genotypes exhibited higher accumulation of hydrogen peroxide (H2O2) and malondialdehyde content. Photosynthetic efficiency was reduced in all genotypes after 24 h of stress treatment, with a particularly drastic reduction in susceptible genotypes compared to their tolerant counterparts. Tolerant genotypes exhibited significantly higher activities of anaerobic metabolism enzymes, enabling prolonged survival under waterlogging conditions. Increase in proline content was observed in all the genotypes indicating the cellular osmotic balance adjustments in response to stress exposure. Consequently, the robust antioxidant potential and efficient anaerobic metabolism observed in the tolerant genotypes served as key mechanisms enabling their resilience to short-term waterlogging exposure. These findings underscore the promising potential of specific sesame genotypes in enhancing crop resilience against waterlogging stress, offering valuable insights for agricultural practices and breeding programs.
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Affiliation(s)
- Vishal Chugh
- Department of Basic & Social Sciences, College of Horticulture, Banda University of Agriculture and Technology, Banda 210001, India;
| | - Vigya Mishra
- Department of Postharvest Technology, College of Horticulture, Banda University of Agriculture and Technology, Banda 210001, India;
| | - Vijay Sharma
- Department of Genetics & Plant Breeding, College of Agriculture, Banda University of Agriculture and Technology, Banda 210001, India; (M.K.); (H.K.)
| | - Mukul Kumar
- Department of Genetics & Plant Breeding, College of Agriculture, Banda University of Agriculture and Technology, Banda 210001, India; (M.K.); (H.K.)
| | - Mouna Ghorbel
- Biology Department, Faculty of Science, University of Hail, Ha’il P.O. Box 2440, Saudi Arabia;
| | - Hitesh Kumar
- Department of Genetics & Plant Breeding, College of Agriculture, Banda University of Agriculture and Technology, Banda 210001, India; (M.K.); (H.K.)
| | - Ashutosh Rai
- Department of Basic & Social Sciences, College of Horticulture, Banda University of Agriculture and Technology, Banda 210001, India;
| | - Rahul Kumar
- ORISE Participant Sponsored by the U.S. Vegetable Laboratory, USDA ARS, 2700 Savannah Highway, Charleston, SC 29414, USA
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Lim H, Kobayashi MJ, Marsoem SN, Irawati D, Kosugi A, Kondo T, Tani N. Transcriptomic responses of oil palm ( Elaeis guineensis) stem to waterlogging at plantation in relation to precipitation seasonality. FRONTIERS IN PLANT SCIENCE 2023; 14:1213496. [PMID: 37636106 PMCID: PMC10448820 DOI: 10.3389/fpls.2023.1213496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 07/24/2023] [Indexed: 08/29/2023]
Abstract
Global warming-induced climate change causes significant agricultural problems by increasing the incidence of drought and flooding events. Waterlogging is an inevitable consequence of these changes but its effects on oil palms have received little attention and are poorly understood. Recent waterlogging studies have focused on oil palm seedlings, with particular emphasis on phenology. However, the transcriptomic waterlogging response of mature oil palms remains elusive in real environments. We therefore investigated transcriptomic changes over time in adult oil palms at plantations over a two-year period with pronounced seasonal variation in precipitation. A significant transcriptional waterlogging response was observed in the oil palm stem core but not in leaf samples when gene expression was correlated with cumulative precipitation over two-day periods. Pathways and processes upregulated or enriched in the stem core response included hypoxia, ethylene signaling, and carbon metabolism. Post-waterlogging recovery in oil palms was found to be associated with responses to heat stress and carotenoid biosynthesis. Nineteen transcription factors (TFs) potentially involved in the waterlogging response of mature oil palms were also identified. These data provide new insights into the transcriptomic responses of planted oil palms to waterlogging and offer valuable guidance on the sensitivity of oil palm plantations to future climate changes.
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Affiliation(s)
- Hui Lim
- Graduate School of Science and Technology, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Masaki J. Kobayashi
- Forestry Division, Japan International Research Center for Agricultural Sciences (JIRCAS), Tsukuba, Ibaraki, Japan
| | | | - Denny Irawati
- Faculty of Forestry, Universitas Gadjah Mada (UGM), Yogyakarta, Indonesia
| | - Akihiko Kosugi
- Biological Resources and Post-harvest Division, Japan International Research Center for Agricultural Sciences (JIRCAS), Tsukuba, Ibaraki, Japan
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Toshiaki Kondo
- Biological Resources and Post-harvest Division, Japan International Research Center for Agricultural Sciences (JIRCAS), Tsukuba, Ibaraki, Japan
| | - Naoki Tani
- Forestry Division, Japan International Research Center for Agricultural Sciences (JIRCAS), Tsukuba, Ibaraki, Japan
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
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Weldemichael MY, Gebremedhn HM. Omics technologies towards sesame improvement: a review. Mol Biol Rep 2023; 50:6885-6899. [PMID: 37326753 DOI: 10.1007/s11033-023-08551-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Accepted: 05/26/2023] [Indexed: 06/17/2023]
Abstract
Genetic improvement of sesame (Sesamum indicum L.), one of the most important oilseed crops providing edible oil, proteins, minerals, and vitamins, is important to ensure a balanced diet for the growing world population. Increasing yield, seed protein, oil, minerals, and vitamins is urgently needed to meet the global demand. The production and productivity of sesame is very low due to various biotic and abiotic stresses. Therefore, various efforts have been made to combat these constraints and increase the production and productivity of sesame through conventional breeding. However, less attention has been paid to the genetic improvement of the crop through modern biotechnological methods, leaving it lagging behind other oilseed crops. Recently, however, the scenario has changed as sesame research has entered the era of "omics" and has made significant progress. Therefore, the purpose of this paper is to provide an overview of the progress made by omics research in improving sesame. This review presents a number of efforts that have been made over past decade using omics technologies to improve various traits of sesame, including seed composition, yield, and biotic and abiotic resistant varieties. It summarizes the advances in genetic improvement of sesame using omics technologies, such as germplasm development (web-based functional databases and germplasm resources), gene discovery (molecular markers and genetic linkage map construction), proteomics, transcriptomics, and metabolomics that have been carried out in the last decade. In conclusion, this review highlights future directions that may be important for omics-assisted breeding in sesame genetic improvement.
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Affiliation(s)
- Micheale Yifter Weldemichael
- Department of Biotechnology, College of Dryland Agriculture and Natural Resources, Mekelle University, P.O. Box 231, Mekelle, Tigrai, Ethiopia.
| | - Hailay Mehari Gebremedhn
- Department of Biotechnology, College of Dryland Agriculture and Natural Resources, Mekelle University, P.O. Box 231, Mekelle, Tigrai, Ethiopia
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Li H, Tahir ul Qamar M, Yang L, Liang J, You J, Wang L. Current Progress, Applications and Challenges of Multi-Omics Approaches in Sesame Genetic Improvement. Int J Mol Sci 2023; 24:3105. [PMID: 36834516 PMCID: PMC9965044 DOI: 10.3390/ijms24043105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 01/16/2023] [Accepted: 01/20/2023] [Indexed: 02/09/2023] Open
Abstract
Sesame is one of the important traditional oil crops in the world, and has high economic and nutritional value. Recently, due to the novel high throughput sequencing techniques and bioinformatical methods, the study of the genomics, methylomics, transcriptomics, proteomics and metabonomics of sesame has developed rapidly. Thus far, the genomes of five sesame accessions have been released, including white and black seed sesame. The genome studies reveal the function and structure of the sesame genome, and facilitate the exploitation of molecular markers, the construction of genetic maps and the study of pan-genomes. Methylomics focus on the study of the molecular level changes under different environmental conditions. Transcriptomics provide a powerful tool to study abiotic/biotic stress, organ development, and noncoding RNAs, and proteomics and metabonomics also provide some support in studying abiotic stress and important traits. In addition, the opportunities and challenges of multi-omics in sesame genetics breeding were also described. This review summarizes the current research status of sesame from the perspectives of multi-omics and hopes to provide help for further in-depth research on sesame.
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Affiliation(s)
- Huan Li
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China
| | - Muhammad Tahir ul Qamar
- Integrative Omics and Molecular Modeling Laboratory, Department of Bioinformatics and Biotechnology, Government College University Faisalabad (GCUF), Faisalabad 38000, Pakistan
| | - Li Yang
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China
| | - Junchao Liang
- Jiangxi Province Key Laboratory of Oil Crops Biology, Crop Research Institute, Nanchang Branch of National Center of Oil Crops Improvement, Jiangxi Academy of Agricultural Sciences, Nanchang 330000, China
| | - Jun You
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China
| | - Linhai Wang
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China
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Li C, Su J, Zhao N, Lou L, Ou X, Yan Y, Wang L, Jiang J, Chen S, Chen F. CmERF5-CmRAP2.3 transcriptional cascade positively regulates waterlogging tolerance in Chrysanthemum morifolium. PLANT BIOTECHNOLOGY JOURNAL 2023; 21:270-282. [PMID: 36200911 PMCID: PMC9884023 DOI: 10.1111/pbi.13940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Revised: 09/13/2022] [Accepted: 09/29/2022] [Indexed: 06/16/2023]
Abstract
Waterlogging stress affects plant growth by limiting root respiration and reducing yield and economic value. Therefore, identifying genes involved in regulating waterlogging stress is vital. This study reports the ethylene-responsive VII transcription factor (CmRAP2.3) in the chrysanthemum. Subcellular localization and transactivation assay analyses revealed that CmRAP2.3 was localized in the nucleus and possessed transactivation activity. Overexpression of CmRAP2.3 in chrysanthemum was found to enhance waterlogging tolerance by decreasing reactive oxygen species (ROS) levels. Furthermore, we found that the transcription factor CmERF5 binds to GCC-like motifs in the CmRAP2.3 promoter region and activates CmRAP2.3 expression. Additionally, CmERF5 overexpression maintained a low ROS level and improved chrysanthemum waterlogging tolerance. Taken together, this study shows a molecular mechanism by which CmERF5 transcriptionally activates CmRAP2.3 to reduce waterlogging stress via the ROS pathway in the chrysanthemum.
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Affiliation(s)
- Chuanwei Li
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Landscaping, Ministry of Agriculture and Rural Affairs, Key Laboratory of Biology of Ornamental Plants in East China, National Forestry and Grassland AdministrationCollege of Horticulture, Nanjing Agricultural UniversityNanjingChina
| | - Jiangshuo Su
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Landscaping, Ministry of Agriculture and Rural Affairs, Key Laboratory of Biology of Ornamental Plants in East China, National Forestry and Grassland AdministrationCollege of Horticulture, Nanjing Agricultural UniversityNanjingChina
| | - Nan Zhao
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Landscaping, Ministry of Agriculture and Rural Affairs, Key Laboratory of Biology of Ornamental Plants in East China, National Forestry and Grassland AdministrationCollege of Horticulture, Nanjing Agricultural UniversityNanjingChina
| | - La Lou
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Landscaping, Ministry of Agriculture and Rural Affairs, Key Laboratory of Biology of Ornamental Plants in East China, National Forestry and Grassland AdministrationCollege of Horticulture, Nanjing Agricultural UniversityNanjingChina
| | - Xiaoli Ou
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Landscaping, Ministry of Agriculture and Rural Affairs, Key Laboratory of Biology of Ornamental Plants in East China, National Forestry and Grassland AdministrationCollege of Horticulture, Nanjing Agricultural UniversityNanjingChina
| | - Yajun Yan
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Landscaping, Ministry of Agriculture and Rural Affairs, Key Laboratory of Biology of Ornamental Plants in East China, National Forestry and Grassland AdministrationCollege of Horticulture, Nanjing Agricultural UniversityNanjingChina
| | - Likai Wang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Landscaping, Ministry of Agriculture and Rural Affairs, Key Laboratory of Biology of Ornamental Plants in East China, National Forestry and Grassland AdministrationCollege of Horticulture, Nanjing Agricultural UniversityNanjingChina
| | - Jiafu Jiang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Landscaping, Ministry of Agriculture and Rural Affairs, Key Laboratory of Biology of Ornamental Plants in East China, National Forestry and Grassland AdministrationCollege of Horticulture, Nanjing Agricultural UniversityNanjingChina
| | - Sumei Chen
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Landscaping, Ministry of Agriculture and Rural Affairs, Key Laboratory of Biology of Ornamental Plants in East China, National Forestry and Grassland AdministrationCollege of Horticulture, Nanjing Agricultural UniversityNanjingChina
| | - Fadi Chen
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Landscaping, Ministry of Agriculture and Rural Affairs, Key Laboratory of Biology of Ornamental Plants in East China, National Forestry and Grassland AdministrationCollege of Horticulture, Nanjing Agricultural UniversityNanjingChina
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Genome-Wide Analysis of AP2/ERF Gene Superfamily in Ramie ( Boehmeria nivea L.) Revealed Their Synergistic Roles in Regulating Abiotic Stress Resistance and Ramet Development. Int J Mol Sci 2022; 23:ijms232315117. [PMID: 36499437 PMCID: PMC9736067 DOI: 10.3390/ijms232315117] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 11/25/2022] [Accepted: 11/29/2022] [Indexed: 12/03/2022] Open
Abstract
AP2/ERF transcription factors (TFs) are one of the largest superfamilies in plants, and play vital roles in growth and response to biotic/abiotic stresses. Although the AP2/ERF family has been extensively characterized in many species, very little is known about this family in ramie (Boehmeria nivea L.). In this study, 138 AP2/ERF TFs were identified from the ramie genome and were grouped into five subfamilies, including the AP2 (19), RAV (5), Soloist (1), ERF (77), and DREB (36). Unique motifs were found in the DREB/ERF subfamily members, implying significance to the AP2/ERF TF functions in these evolutionary branches. Segmental duplication events were found to play predominant roles in the BnAP2/ERF TF family expansion. Light-, stress-, and phytohormone-responsive elements were identified in the promoter region of BnAP2/ERF genes, with abscisic acid response elements (ABRE), methyl jasmonate response elements, and the dehydration response element (DRE) being dominant. The integrated transcriptome and quantitative real-time PCR (qPCR) revealed 12 key BnAP2/ERF genes positively responding to waterlogging. Five of the genes are also involved in ramet development, with two (BnERF-30 and BnERF-32) further showing multifunctional roles. The protein interaction prediction analysis further verified their crosstalk mechanism in coordinating waterlogging resistance and ramet development. Our study provides new insights into the presence of AP2/ERF TFs in ramie, and provides candidate AP2/ERF TFs for further studies on breeding varieties with coupling between water stress tolerance and high yield.
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Zhou W, Song S, Segla Koffi Dossou S, Zhou R, Wei X, Wang Z, Sheng C, Zhang Y, You J, Wang L. Genome-wide association analysis and transcriptome reveal novel loci and a candidate regulatory gene of fatty acid biosynthesis in sesame (Sesamum indicum L.). PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2022; 186:220-231. [PMID: 35921726 DOI: 10.1016/j.plaphy.2022.07.023] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 07/12/2022] [Accepted: 07/18/2022] [Indexed: 06/15/2023]
Abstract
The regulatory mechanisms of fatty acid (FA) biosynthesis and triacylglycerols (TAGs) assembly remain largely misunderstood in sesame. Gas chromatography was used to analyze the natural variation in FA compositions and oil content (OC) in 400 sesame accessions grown in three different environments. The phenotypic data was associated with the newly released SNP data from whole-genome resequencing, and 43 significant loci for FA and OC were identified. Comparative transcriptomics analysis of high-OC and low-OC materials was performed, and 515 differentially expressed genes (DEGs) were identified across three seed developmental stages. By integrating the genome-wide association study (GWAS) and DEGs analysis, twenty candidate genes were identified, of which SiTPS1 (trehalose-6-phosphate synthase 1) has emerged as a key regulatory gene of FAs and TAGs metabolism in sesame. Overexpression of SiTPS1 in transgenic Arabidopsis influenced FA composition and significantly increased OC. Our study provides resources for the markers-based improvement of OC and quality in sesame and other crops.
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Affiliation(s)
- Wangyi Zhou
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, 430062, China
| | - Shengnan Song
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, 430062, China
| | - Senouwa Segla Koffi Dossou
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, 430062, China
| | - Rong Zhou
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, 430062, China
| | - Xin Wei
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai, 200234, China
| | - Zhijian Wang
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, 430062, China
| | - Chen Sheng
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, 430062, China
| | - Yanxin Zhang
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, 430062, China
| | - Jun You
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, 430062, China.
| | - Linhai Wang
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, 430062, China.
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Gao Y, Jiang Z, Shi M, Zhou Y, Huo L, Li X, Xu K. Comparative transcriptome provides insight into responding mechanism of waterlogging stress in Actinidia valvata Dunn. Gene 2022; 845:146843. [PMID: 36041594 DOI: 10.1016/j.gene.2022.146843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 07/20/2022] [Accepted: 08/23/2022] [Indexed: 11/04/2022]
Abstract
Kiwifruit is one of the most popular fruits, and the area of its cultivation in China has grown rapidly over the last decade. However, kiwifruit vines are vulnerable to waterlogging, especially in the extensive areas of south China where it is grown. This has become an important factor limiting yields. Therefore, it is necessary to clarify the responses of kiwifruit to waterlogging. Here, we have selected Actinidia valvata Dunn which is able to withstand waterlogging conditions and the waterlogging-susceptible Actinidia deliciosa to perform the RNA-seq of roots under waterlogging stress. Seedling roots of Actinidia valvata Dunn and Actinidia deliciosa presented distinct root phenotypes after waterlogging treatments. Genome mapping showed a large genome difference between Actinidia valvata Dunn and Actinidia deliciosa. Transcription factors MYB, MYB-related, AP2-EREBP, bHLH, WRKY, and NAC were identified as the key genes involved in the response to waterlogging stress of kiwifruit. Meanwhile, the MAPK signaling pathway and the glycolysis/gluconeogenesis pathway were identified as the vital pathways involved in the response to waterlogging, and key genes were identified from these two pathways. These results will broaden our understanding of transcriptional response of waterlogging stress and will provide new insights into the molecular mechanisms associated with waterlogging stress. Furthermore, identification of the genes responsible will assist in the breeding of kiwifruit tolerant of waterlogging.
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Affiliation(s)
- Yongbin Gao
- College of Horticulture Science, Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, Zhejiang A & F University, Hangzhou, 311300, China
| | - Zeyu Jiang
- College of Horticulture Science, Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, Zhejiang A & F University, Hangzhou, 311300, China
| | - Mengqi Shi
- College of Horticulture Science, Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, Zhejiang A & F University, Hangzhou, 311300, China
| | - Yifei Zhou
- College of Horticulture Science, Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, Zhejiang A & F University, Hangzhou, 311300, China
| | - Liuqing Huo
- College of Horticulture Science, Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, Zhejiang A & F University, Hangzhou, 311300, China
| | - Xiaolong Li
- College of Horticulture Science, Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, Zhejiang A & F University, Hangzhou, 311300, China.
| | - Kai Xu
- College of Horticulture Science, Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, Zhejiang A & F University, Hangzhou, 311300, China.
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11
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Comprehensive Analysis of SRO Gene Family in Sesamum indicum (L.) Reveals Its Association with Abiotic Stress Responses. Int J Mol Sci 2021; 22:ijms222313048. [PMID: 34884850 PMCID: PMC8657681 DOI: 10.3390/ijms222313048] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 11/28/2021] [Accepted: 11/29/2021] [Indexed: 01/12/2023] Open
Abstract
SIMILAR TO RCD-ONEs (SROs) comprise a small plant-specific gene family which play important roles in regulating numerous growth and developmental processes and responses to environmental stresses. However, knowledge of SROs in sesame (Sesamum indicum L.) is limited. In this study, four SRO genes were identified in the sesame genome. Phylogenetic analysis showed that 64 SROs from 10 plant species were divided into two groups (Group I and II). Transcriptome data revealed different expression patterns of SiSROs over various tissues. Expression analysis showed that Group II SROs, especially SiSRO2b, exhibited a stronger response to various abiotic stresses and phytohormones than those in Group I, implying their crucial roles in response to environmental stimulus and hormone signals. In addition, the co-expression network and protein-protein interaction network indicated that SiSROs are associated with a wide range of stress responses. Moreover, transgenic yeast harboring SiSRO2b showed improved tolerance to salt, osmotic and oxidative stress, indicating SiSRO2b could confer multiple tolerances to transgenic yeast. Taken together, this study not only lays a foundation for further functional dissection of the SiSRO gene family, but also provides valuable gene candidates for genetic improvement of abiotic stress tolerance in sesame.
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12
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Hussain A, Khan MI, Albaqami M, Mahpara S, Noorka IR, Ahmed MAA, Aljuaid BS, El-Shehawi AM, Liu Z, Farooq S, Zuan ATK. CaWRKY30 Positively Regulates Pepper Immunity by Targeting CaWRKY40 against Ralstonia solanacearum Inoculation through Modulating Defense-Related Genes. Int J Mol Sci 2021; 22:ijms222112091. [PMID: 34769521 PMCID: PMC8584995 DOI: 10.3390/ijms222112091] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 10/25/2021] [Accepted: 10/29/2021] [Indexed: 11/25/2022] Open
Abstract
The WRKY transcription factors (TFs) network is composed of WRKY TFs’ subset, which performs a critical role in immunity regulation of plants. However, functions of WRKY TFs’ network remain unclear, particularly in non-model plants such as pepper (Capsicum annuum L.). This study functionally characterized CaWRKY30—a member of group III Pepper WRKY protein—for immunity of pepper against Ralstonia solanacearum infection. The CaWRKY30 was detected in nucleus, and its transcriptional expression levels were significantly upregulated by R. solanacearum inoculation (RSI), and foliar application ethylene (ET), abscisic acid (ABA), and salicylic acid (SA). Virus induced gene silencing (VIGS) of CaWRKY30 amplified pepper’s vulnerability to RSI. Additionally, the silencing of CaWRKY30 by VIGS compromised HR-like cell death triggered by RSI and downregulated defense-associated marker genes, like CaPR1, CaNPR1, CaDEF1, CaABR1, CaHIR1, and CaWRKY40. Conversely, transient over-expression of CaWRKY30 in pepper leaves instigated HR-like cell death and upregulated defense-related maker genes. Furthermore, transient over-expression of CaWRKY30 upregulated transcriptional levels of CaWRKY6, CaWRKY22, CaWRKY27, and CaWRKY40. On the other hand, transient over-expression of CaWRKY6, CaWRKY22, CaWRKY27, and CaWRKY40 upregulated transcriptional expression levels of CaWRKY30. The results recommend that newly characterized CaWRKY30 positively regulates pepper’s immunity against Ralstonia attack, which is governed by synergistically mediated signaling by phytohormones like ET, ABA, and SA, and transcriptionally assimilating into WRKY TFs networks, consisting of CaWRKY6, CaWRKY22, CaWRKY27, and CaWRKY40. Collectively, our data will facilitate to explicate the underlying mechanism of crosstalk between pepper’s immunity and response to RSI.
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Affiliation(s)
- Ansar Hussain
- Department of Plant Breeding and Genetics, Ghazi University, Dera Ghazi Khan 32200, Pakistan; (A.H.); (M.I.K.); (S.M.); (I.R.N.)
| | - Muhammad Ifnan Khan
- Department of Plant Breeding and Genetics, Ghazi University, Dera Ghazi Khan 32200, Pakistan; (A.H.); (M.I.K.); (S.M.); (I.R.N.)
| | - Mohammed Albaqami
- Department of Biology, Faculty of Applied Science, Umm Al-Qura University, Makkah 21955, Saudi Arabia;
| | - Shahzadi Mahpara
- Department of Plant Breeding and Genetics, Ghazi University, Dera Ghazi Khan 32200, Pakistan; (A.H.); (M.I.K.); (S.M.); (I.R.N.)
| | - Ijaz Rasool Noorka
- Department of Plant Breeding and Genetics, Ghazi University, Dera Ghazi Khan 32200, Pakistan; (A.H.); (M.I.K.); (S.M.); (I.R.N.)
| | - Mohamed A. A. Ahmed
- Plant Production Department (Horticulture—Medicinal and Aromatic Plants), Faculty of Agriculture (Saba Basha), Alexandria University, Alexandria 21531, Egypt;
| | - Bandar S. Aljuaid
- Department of Biotechnology, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia; (B.S.A.); (A.M.E.-S.)
| | - Ahmed M. El-Shehawi
- Department of Biotechnology, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia; (B.S.A.); (A.M.E.-S.)
| | - Zhiqin Liu
- College of Crop Sciences, Fujian Agriculture and Forestry University, Fuzhou 350001, China
- Correspondence: (Z.L.); (A.T.K.Z.)
| | - Shahid Farooq
- Department of Plant Protection, Faculty of Agriculture, Harran University, Şanlıurfa 63050, Turkey;
| | - Ali Tan Kee Zuan
- Department of Land Management, Faculty of Agriculture, Universiti Putra Malaysia, Serdang 43400, Malaysia
- Correspondence: (Z.L.); (A.T.K.Z.)
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13
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Ren J, Hu J, Zhang A, Ren S, Jing T, Wang X, Sun M, Huang L, Zeng B. The whole-genome and expression profile analysis of WRKY and RGAs in Dactylis glomerata showed that DG6C02319.1 and Dg WRKYs may cooperate in the immunity against rust. PeerJ 2021; 9:e11919. [PMID: 34466285 PMCID: PMC8380429 DOI: 10.7717/peerj.11919] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Accepted: 07/16/2021] [Indexed: 02/01/2023] Open
Abstract
Orchardgrass (Dactylis glomerata) is one of the top four perennial forages worldwide and, despite its large economic advantages, often threatened by various environmental stresses. WRKY transcription factors (TFs) can regulate a variety of plant processes, widely participate in plant responses to biotic and abiotic stresses, and are one of the largest gene families in plants. WRKYs can usually bind W-box elements specifically. In this study, we identified a total of 93 DgWRKY genes and 281 RGAs, including 65, 169 and 47 nucleotide-binding site-leucine-rich repeats (NBS-LRRs), leucine-rich repeats receptor-like protein kinases (LRR-RLKs), and leucine-rich repeats receptor-like proteins (LRR-RLPs), respectively. Through analyzing the expression of DgWRKY genes in orchardgrass under different environmental stresses, it was found that many DgWRKY genes were differentially expressed under heat, drought, submergence, and rust stress. In particular, it was found that the greatest number of genes were differentially expressed under rust infection. Consistently, GO and KEGG enrichment analysis of all genes showed that 78 DgWRKY TFs were identified in the plant–pathogen interaction pathway, with 59 of them differentially expressed. Through cis-acting element prediction, 154 RGAs were found to contain W-box elements. Among them, DG6C02319.1 (a member of the LRR-RLK family) was identified as likely to interact with 14 DGWRKYs. Moreover, their expression levels in susceptible plants after rust inoculation were first up-regulated and then down-regulated, while those in the resistant plants were always up-regulated. In general, DgWRKYs responded to both biotic stress and abiotic stress. DgWRKYs and RGAs may synergistically respond to the response of orchardgrass to rust. This study provides meaningful insight into the molecular mechanisms of WRKY proteins in orchardgrass.
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Affiliation(s)
- Juncai Ren
- College of Animal Science and Technology, Southwest University, Chongqing, Chongqing, China
| | - Jialing Hu
- College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Ailing Zhang
- College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Shuping Ren
- College of Animal Science and Technology, Southwest University, Chongqing, Chongqing, China
| | - Tingting Jing
- College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Xiaoshan Wang
- College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Min Sun
- College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Linkai Huang
- College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Bing Zeng
- College of Animal Science and Technology, Southwest University, Chongqing, Chongqing, China
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14
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Hu J, Lan M, Xu X, Yang H, Zhang L, Lv F, Yang H, Yang D, Li C, He J. Transcriptome Profiling Reveals Molecular Changes during Flower Development between Male Sterile and Fertile Chinese Cabbage ( Brassica rapa ssp. pekinensis) Lines. Life (Basel) 2021; 11:life11060525. [PMID: 34199781 PMCID: PMC8227754 DOI: 10.3390/life11060525] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 05/26/2021] [Accepted: 05/28/2021] [Indexed: 11/16/2022] Open
Abstract
Male sterility exists widely in flowering plants and is used as a fascinating tool by breeders for creating hybrid varieties. Herein, stamen samples from male sterile CCR20000 and male fertile CCR20001 lines during two developmental stages were employed to elucidate the molecular changes during flower development in fertile and sterile Chinese cabbage lines. RNA-seq revealed weak transcriptional activity in the sterile line, which may have led to the abnormal stamen development. The differentially expressed genes were enriched in plant hormone, carbon metabolism, and biosynthesis of amino acid pathways. Important genes with opposite patterns of regulation between the two lines have been associated with the male sterility trait. Members of the transcription factor families such as AP2, MYB, bHLH, and WRKY were highly active in the regulation of structural genes involved in pollen fertility. This study generated important genomic information to support the exploitation of the male sterility trait in Chinese cabbage breeding programs.
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Affiliation(s)
- Jingfeng Hu
- Institute of Horticultural Crops, Yunnan Academy of Agricultural Sciences, Yunnan Branch of the National Vegetable Improvement Center, Kunming 650205, China; (J.H.); (M.L.); (X.X.); (H.Y.); (L.Z.)
| | - Mei Lan
- Institute of Horticultural Crops, Yunnan Academy of Agricultural Sciences, Yunnan Branch of the National Vegetable Improvement Center, Kunming 650205, China; (J.H.); (M.L.); (X.X.); (H.Y.); (L.Z.)
| | - Xuezhong Xu
- Institute of Horticultural Crops, Yunnan Academy of Agricultural Sciences, Yunnan Branch of the National Vegetable Improvement Center, Kunming 650205, China; (J.H.); (M.L.); (X.X.); (H.Y.); (L.Z.)
| | - Hongli Yang
- Institute of Horticultural Crops, Yunnan Academy of Agricultural Sciences, Yunnan Branch of the National Vegetable Improvement Center, Kunming 650205, China; (J.H.); (M.L.); (X.X.); (H.Y.); (L.Z.)
| | - Liqin Zhang
- Institute of Horticultural Crops, Yunnan Academy of Agricultural Sciences, Yunnan Branch of the National Vegetable Improvement Center, Kunming 650205, China; (J.H.); (M.L.); (X.X.); (H.Y.); (L.Z.)
| | - Fengxian Lv
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan & School of Life Sciences, Yunnan University, Kunming 650091, China; (F.L.); (D.Y.); (C.L.)
| | - Huiju Yang
- Lijiang Teachers College, Lijiang 674100, China;
| | - Ding Yang
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan & School of Life Sciences, Yunnan University, Kunming 650091, China; (F.L.); (D.Y.); (C.L.)
| | - Chongjuan Li
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan & School of Life Sciences, Yunnan University, Kunming 650091, China; (F.L.); (D.Y.); (C.L.)
| | - Jiangming He
- Institute of Horticultural Crops, Yunnan Academy of Agricultural Sciences, Yunnan Branch of the National Vegetable Improvement Center, Kunming 650205, China; (J.H.); (M.L.); (X.X.); (H.Y.); (L.Z.)
- Correspondence:
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15
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Dossa K, Zhou R, Li D, Liu A, Qin L, Mmadi MA, Su R, Zhang Y, Wang J, Gao Y, Zhang X, You J. A novel motif in the 5'-UTR of an orphan gene 'Big Root Biomass' modulates root biomass in sesame. PLANT BIOTECHNOLOGY JOURNAL 2021; 19:1065-1079. [PMID: 33369837 PMCID: PMC8131042 DOI: 10.1111/pbi.13531] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 11/30/2020] [Accepted: 12/08/2020] [Indexed: 05/06/2023]
Abstract
Developing crops with improved root system is crucial in current global warming scenario. Underexploited crops are valuable reservoirs of unique genes that can be harnessed for the improvement of major crops. In this study, we performed genome-wide association studies on seven root traits in sesame (Sesamum indicum L.) and uncovered 409 significant signals, 19 quantitative trait loci containing 32 candidate genes. A peak SNP significantly associated with root number and root dry weight traits was located in the promoter of the gene named 'Big Root Biomass' (BRB), which was subsequently validated in a bi-parental population. BRB has no functional annotation and is restricted to the Lamiales order. We detected the presence of a novel motif 'AACACACAC' located in the 5'-UTR of BRB in single and duplicated copy in accessions with high and small root biomass, respectively. A strong expression level of BRB was negatively correlated with high root biomass, and this was attributed to the gene SiMYB181 which represses the activity of BRB by binding specifically to the single motif but not to the duplicated one. Curiously, the allele that enhanced BRB expression has been intensively selected by modern breeding. Overexpression of BRB in Arabidopsis modulates auxin pathway leading to reduced root biomass, improved yield parameters under normal growth conditions and increased drought stress sensitivity. Overall, BRB represents a solid gene model for improving the performance of sesame and other crops.
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Affiliation(s)
- Komivi Dossa
- Oil Crops Research Institute of the Chinese Academy of Agricultural SciencesKey Laboratory of Biology and Genetic Improvement of Oil CropsMinistry of Agriculture and Rural AffairsWuhanChina
- Laboratory of Genetics, Horticulture and Seed SciencesFaculty of Agronomic SciencesUniversity of Abomey‐CalaviCotonouBenin
| | - Rong Zhou
- Oil Crops Research Institute of the Chinese Academy of Agricultural SciencesKey Laboratory of Biology and Genetic Improvement of Oil CropsMinistry of Agriculture and Rural AffairsWuhanChina
| | - Donghua Li
- Oil Crops Research Institute of the Chinese Academy of Agricultural SciencesKey Laboratory of Biology and Genetic Improvement of Oil CropsMinistry of Agriculture and Rural AffairsWuhanChina
| | - Aili Liu
- Oil Crops Research Institute of the Chinese Academy of Agricultural SciencesKey Laboratory of Biology and Genetic Improvement of Oil CropsMinistry of Agriculture and Rural AffairsWuhanChina
| | - Lu Qin
- Oil Crops Research Institute of the Chinese Academy of Agricultural SciencesKey Laboratory of Biology and Genetic Improvement of Oil CropsMinistry of Agriculture and Rural AffairsWuhanChina
| | - Marie A. Mmadi
- Oil Crops Research Institute of the Chinese Academy of Agricultural SciencesKey Laboratory of Biology and Genetic Improvement of Oil CropsMinistry of Agriculture and Rural AffairsWuhanChina
| | - Ruqi Su
- Oil Crops Research Institute of the Chinese Academy of Agricultural SciencesKey Laboratory of Biology and Genetic Improvement of Oil CropsMinistry of Agriculture and Rural AffairsWuhanChina
| | - Yujuan Zhang
- Oil Crops Research Institute of the Chinese Academy of Agricultural SciencesKey Laboratory of Biology and Genetic Improvement of Oil CropsMinistry of Agriculture and Rural AffairsWuhanChina
- Cotton Research CenterShandong Academy of Agricultural SciencesJinanChina
| | - Jianqiang Wang
- Oil Crops Research Institute of the Chinese Academy of Agricultural SciencesKey Laboratory of Biology and Genetic Improvement of Oil CropsMinistry of Agriculture and Rural AffairsWuhanChina
| | - Yuan Gao
- Oil Crops Research Institute of the Chinese Academy of Agricultural SciencesKey Laboratory of Biology and Genetic Improvement of Oil CropsMinistry of Agriculture and Rural AffairsWuhanChina
| | - Xiurong Zhang
- Oil Crops Research Institute of the Chinese Academy of Agricultural SciencesKey Laboratory of Biology and Genetic Improvement of Oil CropsMinistry of Agriculture and Rural AffairsWuhanChina
| | - Jun You
- Oil Crops Research Institute of the Chinese Academy of Agricultural SciencesKey Laboratory of Biology and Genetic Improvement of Oil CropsMinistry of Agriculture and Rural AffairsWuhanChina
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