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Platel R, Lucau-Danila A, Baltenweck R, Maia-Grondard A, Trapet P, Magnin-Robert M, Randoux B, Duret M, Halama P, Hilbert JL, Coutte F, Jacques P, Hugueney P, Reignault P, Siah A. Deciphering immune responses primed by a bacterial lipopeptide in wheat towards Zymoseptoria tritici. FRONTIERS IN PLANT SCIENCE 2023; 13:1074447. [PMID: 36777540 PMCID: PMC9909289 DOI: 10.3389/fpls.2022.1074447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Accepted: 12/27/2022] [Indexed: 06/18/2023]
Abstract
Plant immunity induction with natural biocontrol compounds is a valuable and promising ecofriendly tool that fits with sustainable agriculture and healthy food. Despite the agroeconomic significance of wheat, the mechanisms underlying its induced defense responses remain obscure. We reveal here, using combined transcriptomic, metabolomic and cytologic approach, that the lipopeptide mycosubtilin from the beneficial bacterium Bacillus subtilis, protects wheat against Zymoseptoria tritici through a dual mode of action (direct and indirect) and that the indirect one relies mainly on the priming rather than on the elicitation of plant defense-related mechanisms. Indeed, the molecule primes the expression of 80 genes associated with sixteen functional groups during the early stages of infection, as well as the accumulation of several flavonoids during the period preceding the fungal switch to the necrotrophic phase. Moreover, genes involved in abscisic acid (ABA) biosynthesis and ABA-associated signaling pathways are regulated, suggesting a role of this phytohormone in the indirect activity of mycosubtilin. The priming-based bioactivity of mycosubtilin against a biotic stress could result from an interaction of the molecule with leaf cell plasma membranes that may mimic an abiotic stress stimulus in wheat leaves. This study provides new insights into induced immunity in wheat and opens new perspectives for the use of mycosubtilin as a biocontrol compound against Z. tritici.
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Affiliation(s)
- Rémi Platel
- Joint Research Unit 1158 BioEcoAgro, Junia, Université de Lille, Université de Liège, UPJV, Université d’Artois, ULCO, INRAE, Lille, France
| | - Anca Lucau-Danila
- Joint Research Unit 1158 BioEcoAgro, Junia, Université de Lille, Université de Liège, UPJV, Université d’Artois, ULCO, INRAE, Lille, France
| | | | | | - Pauline Trapet
- Joint Research Unit 1158 BioEcoAgro, Junia, Université de Lille, Université de Liège, UPJV, Université d’Artois, ULCO, INRAE, Lille, France
| | - Maryline Magnin-Robert
- Unité de Chimie Environnementale et Interactions sur le Vivant, Université du Littoral Côte d’Opale, Calais Cedex, France
| | - Béatrice Randoux
- Unité de Chimie Environnementale et Interactions sur le Vivant, Université du Littoral Côte d’Opale, Calais Cedex, France
| | - Morgane Duret
- Joint Research Unit 1158 BioEcoAgro, Junia, Université de Lille, Université de Liège, UPJV, Université d’Artois, ULCO, INRAE, Lille, France
| | - Patrice Halama
- Joint Research Unit 1158 BioEcoAgro, Junia, Université de Lille, Université de Liège, UPJV, Université d’Artois, ULCO, INRAE, Lille, France
| | - Jean-Louis Hilbert
- Joint Research Unit 1158 BioEcoAgro, Junia, Université de Lille, Université de Liège, UPJV, Université d’Artois, ULCO, INRAE, Lille, France
| | - François Coutte
- Joint Research Unit 1158 BioEcoAgro, Junia, Université de Lille, Université de Liège, UPJV, Université d’Artois, ULCO, INRAE, Lille, France
| | - Philippe Jacques
- Joint Research Unit 1158 BioEcoAgro, TERRA Teaching and Research Centre, MiPI, Gembloux Agro-Bio Tech, Université de Liège, Gembloux, Belgium
| | | | - Philippe Reignault
- Unité de Chimie Environnementale et Interactions sur le Vivant, Université du Littoral Côte d’Opale, Calais Cedex, France
| | - Ali Siah
- Joint Research Unit 1158 BioEcoAgro, Junia, Université de Lille, Université de Liège, UPJV, Université d’Artois, ULCO, INRAE, Lille, France
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Gao X, Zou R, Sun H, Liu J, Duan W, Hu Y, Yan Y. Genome-wide identification of wheat ABC1K gene family and functional dissection of TaABC1K3 and TaABC1K6 involved in drought tolerance. FRONTIERS IN PLANT SCIENCE 2022; 13:991171. [PMID: 36105699 PMCID: PMC9465391 DOI: 10.3389/fpls.2022.991171] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Accepted: 08/09/2022] [Indexed: 06/15/2023]
Abstract
Activity of BC1 complex kinase (ABC1K) serves as an atypical kinase family involved in plant stress resistance. This study identified 44 ABC1K genes in the wheat genome, which contained three clades (I-III). TaABC1K genes generally had similar structural features, but differences were present in motif and exon compositions from different clade members. More type II functional divergence sites were detected between clade I and clade III and no positive selection site were found in TaABC1K family. The three-dimensional structure prediction by Alphafold2 showed that TaABC1K proteins had more α-helixes with a relatively even distribution, and different clade members had differences in the content of secondary structures. The cis-acting element analysis showed that TaABC1K genes contained abundant cis-acting elements related to plant hormones and environmental stress response in the promoter region, and generally displayed a significantly upregulated expression under drought stress. In particular, both TaABC1K3 and TaABC1K6 genes from clade I was highly induced by drought stress, and their overexpression in yeast and Arabidopsis enhanced drought tolerance by suppressing active oxygen burst and reducing photosynthesis impairment. Meanwhile, TaABC1K3 and TaABC1K6 could, respectively, complement the function of Arabidopsis abc1k3 and abc1k6 mutants and reduce photosynthesis damage caused by drought stress.
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Ma P, Li H, Liu E, He K, Song Y, Dong C, Wang Z, Zhang X, Zhou Z, Xu Y, Wu J, Zhang H. Evaluation and Identification of Resistance Lines and QTLs of Maize to Seedborne Fusarium verticillioides. PLANT DISEASE 2022; 106:2066-2073. [PMID: 35259305 DOI: 10.1094/pdis-10-21-2247-re] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Internal fungal contamination in cereal grains may affect plant growth and result in health concerns for humans and animals. Fusarium verticillioides is a seedborne fungus that can systemically infect maize. However, few efforts had been devoted to studying the genetics of maize resistance to seedborne F. verticillioides. In this study, we developed a disease evaluation method to identify resistance to seedborne F. verticillioides in maize, by which a set of 121 diverse maize inbred lines were evaluated. A 160 F10-generation recombinant inbred line (RIL) population derived from a cross of the resistant (BT-1) and susceptible (N6) inbred line was further used to identify major quantitative trait loci (QTLs) for seedborne F. verticillioides resistance. Eighteen inbred lines with a high resistance to seedborne F. verticillioides were characterized and could be used as potential germplasm resources for genetic improvement of maize resistance. Six QTLs with high heritability across multiple environments were detected on chromosomes 3, 4, 6, and 10, among which was a major QTL, qISFR4-1. Located on chromosome 4 at the interval of 12922609-13418025, qISFR4-1 could explain 16.63% of the total phenotypic variance. Distinct expression profiles of eight candidate genes in qISFR4-1 between BT-1 and N6 inbred lines suggested their pivotal regulatory roles in seedborne F. verticillioides resistance. Taken together, these results will improve our understanding of the resistant mechanisms of seedborne F. verticillioides and would provide valuable germplasm resources for disease resistance breeding in maize.
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Affiliation(s)
- Peipei Ma
- College of Life Sciences, Henan Agricultural University, Zhengzhou 450002, China
- College of Agronomy, Synergetic Innovation Center of Henan Grain Crops and National Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou 450002, China
| | - Haojie Li
- College of Life Sciences, Henan Agricultural University, Zhengzhou 450002, China
| | - Enpeng Liu
- College of Life Sciences, Henan Agricultural University, Zhengzhou 450002, China
| | - Kewei He
- College of Life Sciences, Henan Agricultural University, Zhengzhou 450002, China
| | - Yunxia Song
- College of Life Sciences, Henan Agricultural University, Zhengzhou 450002, China
| | - Chaopei Dong
- College of Life Sciences, Henan Agricultural University, Zhengzhou 450002, China
| | - Zhao Wang
- College of Life Sciences, Henan Agricultural University, Zhengzhou 450002, China
| | - Xuecai Zhang
- Global Maize Program, International Maize and Wheat Improvement Center (CIMMYT), 06600 Mexico DF, Mexico
| | - Zijian Zhou
- College of Life Sciences, Henan Agricultural University, Zhengzhou 450002, China
| | - Yufang Xu
- College of Life Sciences, Henan Agricultural University, Zhengzhou 450002, China
| | - Jianyu Wu
- College of Life Sciences, Henan Agricultural University, Zhengzhou 450002, China
- College of Agronomy, Synergetic Innovation Center of Henan Grain Crops and National Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou 450002, China
| | - Huiyong Zhang
- College of Life Sciences, Henan Agricultural University, Zhengzhou 450002, China
- College of Agronomy, Synergetic Innovation Center of Henan Grain Crops and National Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou 450002, China
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Zhu X, Li X, He Q, Guo D, Liu C, Cao J, Wu Z, Kang Z, Wang X. TaMYB29: A Novel R2R3-MYB Transcription Factor Involved in Wheat Defense Against Stripe Rust. FRONTIERS IN PLANT SCIENCE 2021; 12:783388. [PMID: 34912363 PMCID: PMC8666710 DOI: 10.3389/fpls.2021.783388] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Accepted: 11/04/2021] [Indexed: 06/03/2023]
Abstract
Members of the R2R3-MYB transcription factor superfamily have been implicated in plant development, improved disease resistance, and defense responses to several types of stresses. To study the function of TaMYB29 transcription factor-a member of the R2R3-MYB superfamily-in response to an avirulent race of stripe rust pathogen, Puccinia striiformis f. sp. tritici (Pst), we identified and cloned the TaMYB29 gene from wheat cultivar (cv.) AvS+Yr10 following infection with Pst. The TaMYB29 protein, comprising 261 amino acids, contains two highly conserved MYB domains. We first showed that TaMYB29 is a transcription factor, whose transcriptional levels are significantly induced by salicylic acid (SA), abscisic acid (ABA), jasmonic acid (JA), ethylene (ET), and Pst. The results showed that TaMYB29 is involved in the wheat response to stipe rust. The overexpression of the TaMYB29 gene resulted in the accumulation of reactive oxygen species (ROS) and pathogen-independent cell death in Nicotiana benthamiana leaves. The silencing of TaMYB29 gene in wheat cv. AvS+Yr10, containing the stripe rust resistance gene Yr10, promoted hyphae growth, significantly downregulated the expression of pathogenesis-related (PR) genes, and substantially reduced the wheat resistance to Pst compared with the non-silenced control. In addition, the accumulation of hydrogen peroxide (H2O2) significantly decreased, and the activity of catalase, an enzyme required for H2O2 scavenging, was elevated. Altogether, TaMYB29 positively regulates the defense response against stripe rust in wheat AvS+Yr10 by enhancing H2O2 accumulation, PR gene expression, and SA signaling pathway-induced cell death. These results provide new insights into the contribution of TaMYB29 to the defense response against rust pathogens in wheat.
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Affiliation(s)
- Xiaoxu Zhu
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Life Sciences, Northwest A&F University, Yangling, China
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling, China
| | - Xiang Li
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Innovation and Experiment, Northwest A&F University, Yangling, China
| | - Qi He
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Life Sciences, Northwest A&F University, Yangling, China
| | - Dongxiao Guo
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Life Sciences, Northwest A&F University, Yangling, China
| | - Caiqi Liu
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Innovation and Experiment, Northwest A&F University, Yangling, China
| | - Junying Cao
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Life Sciences, Northwest A&F University, Yangling, China
| | - Zhongyi Wu
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Life Sciences, Northwest A&F University, Yangling, China
| | - Zhensheng Kang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling, China
| | - Xiaojing Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Life Sciences, Northwest A&F University, Yangling, China
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Mamun MAA, Tang C, Sun Y, Islam MN, Liu P, Wang X, Kang Z. Wheat Gene TaATG8j Contributes to Stripe Rust Resistance. Int J Mol Sci 2018; 19:ijms19061666. [PMID: 29874811 PMCID: PMC6032272 DOI: 10.3390/ijms19061666] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2018] [Revised: 05/30/2018] [Accepted: 06/01/2018] [Indexed: 11/16/2022] Open
Abstract
Autophagy-related 8 (ATG8) protein has been reported to be involved in plant’s innate immune response, but it is not clear whether such genes play a similar role in cereal crops against obligate biotrophic fungal pathogens. Here, we reported an ATG8 gene from wheat (Triticum aestivum), designated TaATG8j. This gene has three copies located in chromosomes 2AS, 2BS, and 2DS. The transcriptions of all three copies were upregulated in plants of the wheat cultivar Suwon 11, inoculated with an avirulent race (CYR23) of Puccinia striiformis f. sp. tritici (Pst), the causal fungal pathogen of stripe rust. The transient expression of TaATG8j in Nicotiana benthamiana showed that TaATG8j proteins were distributed throughout the cytoplasm, but mainly in the nucleus and plasma membrane. The overexpression of TaATG8j in N. benthamiana slightly delayed the cell death caused by the mouse apoptotic protein BAX (BCL2-associated X protein). However, the expression of TaATG8j in yeast (Schizosaccharomyces pombe) induced cell death. The virus-induced gene silencing of all TaATG8j copies rendered Suwon 11 susceptible to the avirulent Pst race CYR23, accompanied by an increased fungal biomass and a decreased necrotic area per infection site. These results indicate that TaATG8j contributes to wheat resistance against stripe rust fungus by regulating cell death, providing information for the understanding of the mechanisms of wheat resistance to the stripe rust pathogen.
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Affiliation(s)
- Md Abdullah-Al Mamun
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University, Yangling 712100, China.
- Regional Wheat Research Centre, Bangladesh Agricultural Research Institute, Shyampur, Rajshahi-6212, Bangladesh.
| | - Chunlei Tang
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University, Yangling 712100, China.
| | - Yingchao Sun
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University, Yangling 712100, China.
| | - Md Nazrul Islam
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University, Yangling 712100, China.
- Key Laboratory of Integrated Pest Management on the Loess Plateau of Ministry of Agriculture, Northwest A&F University, Yangling 712100, China.
- Agrochemical and Environmental Research Division, Institute of Food and Radiation Biology, Atomic Energy Research Establishment, Bangladesh Atomic Energy Commission, Ganakbari, Savar, Dhaka-1349, Bangladesh.
| | - Peng Liu
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University, Yangling 712100, China.
| | - Xiaojie Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University, Yangling 712100, China.
| | - Zhensheng Kang
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University, Yangling 712100, China.
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Wang X, Wang Y, Liu P, Ding Y, Mu X, Liu X, Wang X, Zhao M, Huai B, Huang L, Kang Z. TaRar1 Is Involved in Wheat Defense against Stripe Rust Pathogen Mediated by YrSu. FRONTIERS IN PLANT SCIENCE 2017; 8:156. [PMID: 28261230 PMCID: PMC5306363 DOI: 10.3389/fpls.2017.00156] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2016] [Accepted: 01/25/2017] [Indexed: 05/28/2023]
Abstract
RAR1 is a eukaryotic zinc-binding protein first identified as required for race-specific resistance to powdery mildew in barley. To study the function of TaRAR1 involvement in wheat (Triticum aestivum L.) defense against the infection of stripe rust pathogen Puccinia striiformis f. sp. tritici (Pst), we identified and cloned three wheat homeologous genes highly similar to the barley HvRar1, designated as TaRar1-2A, TaRar1-2B, and TaRar1-2D. The three TaRAR1 proteins all contain two conserved cysteine-and histidine-rich domains (CHORD-I and -II) shared by known RAR1-like proteins. Characterization of TaRar1 expression revealed that the expression was tissue-specific and up-regulated in wheat during stripe rust infection. Moreover, the transcription of TaRar1 was induced by methyl jasmonate, ethylene, and abscisic acid hormones. The same results were observed with drought and wound treatments. After TaRar1 was silenced in wheat cultivar Suwon11 containing the stripe rust resistance gene YrSu, the endogenous salicylic acid (SA) level, the hydrogen peroxide (H2O2) accumulation and the degree of hypersensitive response (HR) were significantly decreased, and the resistance to the avirulent pathotype of stripe rust was compromised. Meanwhile, the expression of catalase, an enzyme required for H2O2-scavenging, was up-regulated. Taken together, we concluded that TaRar1 is involved in wheat defense against stripe rust mediated by YrSu, and the defense was through SA to influence reactive oxygen species accumulation and HR.
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Affiliation(s)
- Xiaojing Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Life Sciences, Northwest A&F UniversityYangling, China
| | - Yaru Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Life Sciences, Northwest A&F UniversityYangling, China
| | - Peng Liu
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F UniversityYangling, China
| | - Yan Ding
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Life Sciences, Northwest A&F UniversityYangling, China
| | - Xiaoqian Mu
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Life Sciences, Northwest A&F UniversityYangling, China
| | - Xiping Liu
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Life Sciences, Northwest A&F UniversityYangling, China
| | - Xiaojie Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F UniversityYangling, China
| | - Mengxin Zhao
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F UniversityYangling, China
| | - Baoyu Huai
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Life Sciences, Northwest A&F UniversityYangling, China
| | - Li Huang
- Department of Plant Sciences and Plant Pathology, Montana State University, BozemanMT, USA
| | - Zhensheng Kang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F UniversityYangling, China
- China–Australia Joint Research Centre for Abiotic and Biotic Stress Management, Northwest A&F UniversityYangling, China
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Li T, Jiang J, Zhang S, Shu H, Wang Y, Lai J, Du J, Yang C. OsAGSW1, an ABC1-like kinase gene, is involved in the regulation of grain size and weight in rice. JOURNAL OF EXPERIMENTAL BOTANY 2015; 66:5691-5701. [PMID: 25922483 DOI: 10.1093/jxb/erv160] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Grain shape and weight are two determining agronomic traits of rice yield. ABC1 (Activity of bc1 complex) is a newly found atypical kinase in plants. Here, we report on an ABC1 protein kinase gene, OsAGSW1 (ABC1-like kinase related to Grain size and Weight). Expression of OsAGSW1-GFP in rice revealed that OsAGSW1 is localized to the chloroplasts in rice. Analysis of OsAGSW1 promoter::β-glucuronidase transgenic rice indicated that this gene was highly expressed in vascular bundles in shoot, hull and caryopsis. Furthermore, OsAGSW1-RNAi and overexpressed transgenic rice lines were generated. Stable transgenic lines overexpressing OsAGSW1 exhibited a phenotype with a significant increase in grain size, grain weight, grain filling rate and 1000-grain weight compared with the wild-type and RNAi transgenic plants. Microscopy analysis showed that spikelet hulls just before heading were different in the OsAGSW1-overexpressed plants compared with wild-type and OsAGSW1 RNAi rice. Further cytological analysis showed that the number of external parenchyma cells in rice hulls of OsAGSW1-overexpressed plants increased, leading to wider and longer spikelet hulls than those of the wild-type and OsAGSW1-RNAi plants. The vascular cross-sectional area in lemma, carpopodium and ovules also strikingly increased and area of both xylem and phloem were enlarged in the OsAGSW1-overexpressed plants. Thus, our results demonstrated that OsAGSW1 plays an important role in seed shape and size of rice by regulating the number of external parenchyma cells and the development of vascular bundles, providing a new insight into the functions of ABC1 genes in plants.
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Affiliation(s)
- Tao Li
- Guangdong Key Lab of Biotechnology for Plant Development, College of Life Science, South China Normal University, Guangzhou 510631, China Vegetable Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, Guangdong, 510640, China
| | - Jieming Jiang
- Guangdong Key Lab of Biotechnology for Plant Development, College of Life Science, South China Normal University, Guangzhou 510631, China
| | - Shengchun Zhang
- Guangdong Key Lab of Biotechnology for Plant Development, College of Life Science, South China Normal University, Guangzhou 510631, China
| | - Haoran Shu
- Guangdong Key Lab of Biotechnology for Plant Development, College of Life Science, South China Normal University, Guangzhou 510631, China
| | - Yaqin Wang
- Guangdong Key Lab of Biotechnology for Plant Development, College of Life Science, South China Normal University, Guangzhou 510631, China
| | - Jianbin Lai
- Guangdong Key Lab of Biotechnology for Plant Development, College of Life Science, South China Normal University, Guangzhou 510631, China
| | - Jinju Du
- Guangdong Key Lab of Biotechnology for Plant Development, College of Life Science, South China Normal University, Guangzhou 510631, China
| | - Chengwei Yang
- Guangdong Key Lab of Biotechnology for Plant Development, College of Life Science, South China Normal University, Guangzhou 510631, China
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Transcriptome analysis of maize leaf systemic symptom infected by Bipolaris zeicola. PLoS One 2015; 10:e0119858. [PMID: 25781606 PMCID: PMC4363367 DOI: 10.1371/journal.pone.0119858] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Accepted: 01/16/2015] [Indexed: 11/19/2022] Open
Abstract
Bipolaris zeicola is a fungal pathogen that causes Northern corn leaf spot (NCLS), which is a serious foliar disease in maize and one of the most significant pathogens affecting global food security. Here, we report a genome-wide transcriptional profile analysis using next-generation sequencing (NGS) of maize leaf development after inoculation with B. zeicola. We performed High-Throughput Digital Gene Expression analysis to identify differentially expressed genes (DEGs) in resistant inbred Mo17 lines after infection with B. zeicola at four successive disease development stages--CP (contact period), PP (penetration period), IP (incubation period), and DP (disease period); the expression of the genes was compared with those in a CK (mock-treatment) control. In addition, a sensitive maize line (Zheng58) was used for the comparisons with the Mo17. Among all tested genes, 466 differentially expressed genes were identified in all libraries, and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis of these genes suggested that they are involved in many biological processes related to systemic symptom development, such as plant hormone signal transduction, starch and sucrose metabolism, phenylpropanoid biosynthesis and photosynthesis. Our systematic analysis provides comprehensive transcriptomic information regarding systemic symptom development in fungal-infected plants. This information will help in furthering our understanding of the detailed mechanisms of plant responses to fungal infection.
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Zegeye H, Rasheed A, Makdis F, Badebo A, Ogbonnaya FC. Genome-wide association mapping for seedling and adult plant resistance to stripe rust in synthetic hexaploid wheat. PLoS One 2014; 9:e105593. [PMID: 25153126 PMCID: PMC4143293 DOI: 10.1371/journal.pone.0105593] [Citation(s) in RCA: 115] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2014] [Accepted: 07/23/2014] [Indexed: 01/08/2023] Open
Abstract
Use of genetic diversity from related wild and domesticated species has made a significant contribution to improving wheat productivity. Synthetic hexaploid wheats (SHWs) exhibit natural genetic variation for resistance and/or tolerance to biotic and abiotic stresses. Stripe rust caused by (Puccinia striiformis f. sp. tritici; Pst), is an important disease of wheat worldwide. To characterise loci conferring resistance to stripe rust in SHWs, we conducted a genome-wide association study (GWAS) with a panel of 181 SHWs using the wheat 9 K SNP iSelect array. The SHWs were evaluated for their response to the prevailing races of Pst at the seedling and adult plant stages, the latter in replicated field trials at two sites in Ethiopia in 2011. About 28% of the SHWs exhibited immunity at the seedling stage while 56% and 83% were resistant to Pst at the adult plant stage at Meraro and Arsi Robe, respectively. A total of 27 SNPs in nine genomic regions (1 BS, 2 AS, 2 BL, 3 BL, 3 DL, 5A, 5 BL, 6DS and 7A) were linked with resistance to Pst at the seedling stage, while 38 SNPs on 18 genomic regions were associated with resistance at the adult plant stage. Six genomic regions were commonly detected at both locations using a mixed linear model corrected for population structure, kinship relatedness and adjusted for false discovery rate (FDR). The loci on chromosome regions 1 AS, 3 DL, 6 DS and 7 AL appeared to be novel QTL; our results confirm that resynthesized wheat involving its progenitor species is a rich source of new stripe (yellow) rust resistance that may be useful in choosing SHWs and incorporating diverse yellow rust (YR) resistance loci into locally adapted wheat cultivars.
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Affiliation(s)
| | - Awais Rasheed
- Crop Science Research Institute/National Wheat Improvement Centre, Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
- Department of Plant Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Farid Makdis
- Department of Field Crops, Faculty of Agriculture, University of Aleppo, Aleppo, Syria
- Research Program, Grains Research and Development Corporation, Barton, Australian Capital Territory, Canberra, Australia
| | - Ayele Badebo
- Ethiopian Institute of Agricultural Research, Addis Ababa, Ethiopia
| | - Francis C. Ogbonnaya
- International Centre for Agricultural Research in the Dry Areas (ICARDA), Aleppo, Syria
- Research Program, Grains Research and Development Corporation, Barton, Australian Capital Territory, Canberra, Australia
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