1
|
Gao H, Li D, Hu H, Zhou F, Yu Y, Wei Q, Liu Q, Liu M, Hu P, Chen E, Song P, Su X, Guan Y, Qiao M, Ru Z, Li C. Regulation of carbohydrate metabolism during anther development in a thermo-sensitive genic male-sterile wheat line. PLANT, CELL & ENVIRONMENT 2024; 47:2410-2425. [PMID: 38517937 DOI: 10.1111/pce.14888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 03/03/2024] [Accepted: 03/05/2024] [Indexed: 03/24/2024]
Abstract
Bainong sterility (BNS) is a thermo-sensitive genic male sterile wheat line, characterised by anther fertility transformation in response to low temperature (LT) stress during meiosis, the failure of vacuole decomposition and the absence of starch accumulation in sterile bicellular pollen. Our study demonstrates that the late microspore (LM) stage marks the transition from the anther growth to anther maturation phase, characterised by the changes in anther structure, carbohydrate metabolism and the main transport pathway of sucrose (Suc). Fructan is a main storage polysaccharide in wheat anther, and its synthesis and remobilisation are crucial for anther development. Moreover, the process of pollen amylogenesis and the fate of the large vacuole in pollen are closely intertwined with fructan synthesis and remobilisation. LT disrupts the normal physiological metabolism of BNS anthers during meiosis, particularly affecting carbohydrate metabolism, thus determining the fate of male gametophytes and pollen abortion. Disruption of fructan synthesis and remobilisation regulation serves as a decisive event that results in anther abortion. Sterile pollen exhibits common traits of pollen starvation and impaired starch accumulation due to the inhibition of apoplastic transport starting from the LM stage, which is regulated by cell wall invertase TaIVR1 and Suc transporter TaSUT1.
Collapse
Affiliation(s)
- Huanting Gao
- Henan Engineering Research Centre of Crop Genome Editing, Henan Institute of Science and Technology, Xinxiang, Henan, China
| | - Dongxiao Li
- Henan Engineering Research Centre of Crop Genome Editing, Henan Institute of Science and Technology, Xinxiang, Henan, China
- Henan Collaborative Innovation Centre of Modern Biological Breeding, Henan Institute of Science and Technology, Xinxiang, Henan, China
- Henan Provincial Key Laboratory of Hybrid Wheat, Henan Institute of Science and Technology, Xinxiang, Henan, China
| | - Haiyan Hu
- Henan Engineering Research Centre of Crop Genome Editing, Henan Institute of Science and Technology, Xinxiang, Henan, China
- Henan Collaborative Innovation Centre of Modern Biological Breeding, Henan Institute of Science and Technology, Xinxiang, Henan, China
- Henan Provincial Key Laboratory of Hybrid Wheat, Henan Institute of Science and Technology, Xinxiang, Henan, China
| | - Feng Zhou
- Henan Engineering Research Centre of Crop Genome Editing, Henan Institute of Science and Technology, Xinxiang, Henan, China
| | - Yongang Yu
- Henan Engineering Research Centre of Crop Genome Editing, Henan Institute of Science and Technology, Xinxiang, Henan, China
- Henan Collaborative Innovation Centre of Modern Biological Breeding, Henan Institute of Science and Technology, Xinxiang, Henan, China
- Henan Provincial Key Laboratory of Hybrid Wheat, Henan Institute of Science and Technology, Xinxiang, Henan, China
| | - Qichao Wei
- Henan Engineering Research Centre of Crop Genome Editing, Henan Institute of Science and Technology, Xinxiang, Henan, China
- Henan Collaborative Innovation Centre of Modern Biological Breeding, Henan Institute of Science and Technology, Xinxiang, Henan, China
- Henan Provincial Key Laboratory of Hybrid Wheat, Henan Institute of Science and Technology, Xinxiang, Henan, China
| | - Qili Liu
- Henan Engineering Research Centre of Crop Genome Editing, Henan Institute of Science and Technology, Xinxiang, Henan, China
| | - Mingjiu Liu
- Henan Engineering Research Centre of Crop Genome Editing, Henan Institute of Science and Technology, Xinxiang, Henan, China
- Henan Collaborative Innovation Centre of Modern Biological Breeding, Henan Institute of Science and Technology, Xinxiang, Henan, China
- Henan Provincial Key Laboratory of Hybrid Wheat, Henan Institute of Science and Technology, Xinxiang, Henan, China
| | - Ping Hu
- Henan Engineering Research Centre of Crop Genome Editing, Henan Institute of Science and Technology, Xinxiang, Henan, China
- Henan Collaborative Innovation Centre of Modern Biological Breeding, Henan Institute of Science and Technology, Xinxiang, Henan, China
- Henan Provincial Key Laboratory of Hybrid Wheat, Henan Institute of Science and Technology, Xinxiang, Henan, China
| | - Eryong Chen
- Henan Engineering Research Centre of Crop Genome Editing, Henan Institute of Science and Technology, Xinxiang, Henan, China
- Henan Collaborative Innovation Centre of Modern Biological Breeding, Henan Institute of Science and Technology, Xinxiang, Henan, China
- Henan Provincial Key Laboratory of Hybrid Wheat, Henan Institute of Science and Technology, Xinxiang, Henan, China
| | - Puwen Song
- Henan Engineering Research Centre of Crop Genome Editing, Henan Institute of Science and Technology, Xinxiang, Henan, China
- Henan Collaborative Innovation Centre of Modern Biological Breeding, Henan Institute of Science and Technology, Xinxiang, Henan, China
- Henan Provincial Key Laboratory of Hybrid Wheat, Henan Institute of Science and Technology, Xinxiang, Henan, China
| | - Xiaojia Su
- Henan Engineering Research Centre of Crop Genome Editing, Henan Institute of Science and Technology, Xinxiang, Henan, China
- Henan Collaborative Innovation Centre of Modern Biological Breeding, Henan Institute of Science and Technology, Xinxiang, Henan, China
| | - Yuanyuan Guan
- Henan Engineering Research Centre of Crop Genome Editing, Henan Institute of Science and Technology, Xinxiang, Henan, China
- Henan Collaborative Innovation Centre of Modern Biological Breeding, Henan Institute of Science and Technology, Xinxiang, Henan, China
| | - Mei Qiao
- College of Science and Engineering, Hebei Agricultural University, Baoding, Hebei, China
| | - Zhengang Ru
- Henan Collaborative Innovation Centre of Modern Biological Breeding, Henan Institute of Science and Technology, Xinxiang, Henan, China
- Henan Provincial Key Laboratory of Hybrid Wheat, Henan Institute of Science and Technology, Xinxiang, Henan, China
| | - Chengwei Li
- Henan Engineering Research Centre of Crop Genome Editing, Henan Institute of Science and Technology, Xinxiang, Henan, China
- College of Life Science, Henan Agricultural University, Zhengzhou, Henan, China
| |
Collapse
|
2
|
Guo X, Zhang Z, Li J, Zhang S, Sun W, Xiao X, Sun Z, Xue X, Wang Z, Zhang Y. Phenotypic and transcriptome profiling of spikes reveals the regulation of light regimens on spike growth and fertile floret number in wheat. PLANT, CELL & ENVIRONMENT 2024; 47:1575-1591. [PMID: 38269615 DOI: 10.1111/pce.14832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 12/25/2023] [Accepted: 01/11/2024] [Indexed: 01/26/2024]
Abstract
The spike growth phase is critical for the establishment of fertile floret (grain) numbers in wheat (Triticum aestivum L.). Then, how to shorten the spike growth phase and increase grain number synergistically? Here, we showed high-resolution analyses of floret primordia (FP) number, morphology and spike transcriptomes during the spike growth phase under three light regimens. The development of all FP in a spike could be divided into four distinct stages: differentiation (Stage I), differentiation and morphology development concurrently (Stage II), morphology development (Stage III), and polarization (Stage IV). Compared to the short photoperiod, the long photoperiod shortened spike growth and stimulated early flowering by shortening Stage III; however, this reduced assimilate accumulation, resulting in fertile floret loss. Interestingly, long photoperiod supplemented with red light shortened the time required to complete Stages I-II, then raised assimilates supply in the spike and promoted anther development before polarization initiation, thereby increasing fertile FP number during Stage III, and finally maintained fertile FP development during Stage IV until they became fertile florets via a predicted dynamic gene network. Our findings proposed a light regimen, critical stages and candidate regulators that achieved a shorter spike growth phase and a higher fertile floret number in wheat.
Collapse
Affiliation(s)
- Xiaolei Guo
- Department of Agronomy, College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
- National Research Center of Intelligent Equipment for Agriculture, Beijing, China
- Department of Agronomy, College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Zhen Zhang
- Department of Agronomy, College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
| | - Junyan Li
- Department of Agronomy, College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
- National Research Center of Intelligent Equipment for Agriculture, Beijing, China
| | - Siqi Zhang
- Department of Agronomy, College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
- National Research Center of Intelligent Equipment for Agriculture, Beijing, China
| | - Wan Sun
- Department of Agronomy, College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
| | - Xuechen Xiao
- Department of Agronomy, College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
| | - Zhencai Sun
- Department of Agronomy, College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
| | - Xuzhang Xue
- National Research Center of Intelligent Equipment for Agriculture, Beijing, China
| | - Zhimin Wang
- Department of Agronomy, College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
| | - Yinghua Zhang
- Department of Agronomy, College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
| |
Collapse
|
3
|
Zhang J, Wu P, Li N, Xu X, Wang S, Chang S, Zhang Y, Wang X, Liu W, Ma Y, Manghwar H, Zhang X, Min L, Guo X. A male-sterile mutant with necrosis-like dark spots on anthers was generated in cotton. FRONTIERS IN PLANT SCIENCE 2023; 13:1102196. [PMID: 36699851 PMCID: PMC9868585 DOI: 10.3389/fpls.2022.1102196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Accepted: 12/19/2022] [Indexed: 06/17/2023]
Abstract
Although conventional hybrid breeding has paved the way for improving cotton production and other properties, it is undoubtedly time and labor consuming, while the cultivation of male sterile line can fix the problem. Here, we induced male sterile mutants by simultaneously editing three cotton EXCESS MICROSPOROCYTES1 (GhEMS1) genes by CRISPR/Cas9. Notably, the GhEMS1 genes are homologous to AtEMS1 genes, which inhibit the production of middle layer and tapetum cells as well, leading to male sterility in cotton. Interestingly, there are necrosis-like dark spots on the surface of the anthers of GhEMS1s mutants, which is different from AtEMS1 mutant whose anther surface is clean and smooth, suggesting that the function of EMS1 gene has not been uncovered yet. Moreover, we have detected mutations in GhEMS1 genes from T0 to T3 mutant plants, which had necrosis-like dark spots as well, indicating that the mutation of the three GhEMS1 genes could be stably inherited. Dynamic transcriptomes showed plant hormone pathway and anther development genetic network were differential expression in mutant and wild-type anthers. And the lower level of IAA content in the mutant anthers than that in the wild type at four anther developmental stages may be the reason for the male sterility. This study not only facilitates the exploration of the basic research of cotton male sterile lines, but also provides germplasms for accelerating the hybrid breeding in cotton.
Collapse
Affiliation(s)
- Jun Zhang
- National Key Laboratory of Crop Genetic Improvement & Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, China
| | - Peng Wu
- National Key Laboratory of Crop Genetic Improvement & Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
| | - Ning Li
- National Key Laboratory of Crop Genetic Improvement & Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
| | - Xiaolan Xu
- National Key Laboratory of Crop Genetic Improvement & Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
| | - Songxin Wang
- National Key Laboratory of Crop Genetic Improvement & Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
| | - Siyuan Chang
- National Key Laboratory of Crop Genetic Improvement & Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
| | - Yuping Zhang
- National Key Laboratory of Crop Genetic Improvement & Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
| | - Xingxing Wang
- National Key Laboratory of Crop Genetic Improvement & Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
| | - Wangshu Liu
- Zhejiang Provincial Key Laboratory of Crop Genetic Resources, Institute of Crop Science, Plant Precision Breeding Academy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Yizan Ma
- National Key Laboratory of Crop Genetic Improvement & Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
| | - Hakim Manghwar
- National Key Laboratory of Crop Genetic Improvement & Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, China
| | - Xianlong Zhang
- Zhejiang Provincial Key Laboratory of Crop Genetic Resources, Institute of Crop Science, Plant Precision Breeding Academy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Ling Min
- National Key Laboratory of Crop Genetic Improvement & Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
| | - Xiaoping Guo
- National Key Laboratory of Crop Genetic Improvement & Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
| |
Collapse
|
4
|
|
5
|
Jiao Z, Zhu X, Li H, Liu Z, Huang X, Wu N, An J, Li J, Zhang J, Jiang Y, Li Q, Qi Z, Niu J. Cytological and molecular characterizations of a novel 2A nullisomic line derived from a widely-grown wheat cultivar Zhoumai 18 conferring male sterility. PeerJ 2020; 8:e10275. [PMID: 33194433 PMCID: PMC7605228 DOI: 10.7717/peerj.10275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Accepted: 10/08/2020] [Indexed: 11/20/2022] Open
Abstract
A dwarf, multi-pistil and male sterile dms mutant was previously reported by us. However, the genetic changes in this dms are unclear. To examine the genetic changes, single nucleotide polymorphism (SNP) association, chromosome counting, and high-resolution chromosome fluorescence in situ hybridization (FISH) techniques were employed. By comparing tall plants (T) with dwarf plants (D) in the offspring of dms mutant plants, SNP association analysis indicated that most SNPs were on chromosome 2A. There were three types in offspring of dms plants, with 42, 41 and 40 chromosomes respectively. High-resolution chromosome painting analysis demonstrated that T plants had all 42 wheat chromosomes; the medium plants (M) had 41 chromosomes, lacking one chromosome 2A; while D plants had 40 wheat chromosomes, and lacked both 2A chromosomes. These data demonstrated that dms resulted from a loss of chromosome 2A. We identified 23 genes on chromosome 2A which might be involved in the development of stamens or pollen grains. These results lay a solid foundation for further analysis of the molecular mechanisms of wheat male sterility. Because D plants can be used as a female parent to cross with other wheat genotypes, dms is a unique germplasm for any functional study of chromosome 2A and wheat breeding specifically targeting genes on 2A.
Collapse
Affiliation(s)
- Zhixin Jiao
- Henan Agricultural University, National Centre of Engineering and Technological Research for Wheat / National Key Laboratory of Wheat and Maize Crop Science, Zhengzhou, Henan, China
| | - Xinxin Zhu
- Henan Agricultural University, National Centre of Engineering and Technological Research for Wheat / National Key Laboratory of Wheat and Maize Crop Science, Zhengzhou, Henan, China
| | - Huijuan Li
- Henan Agricultural University, National Centre of Engineering and Technological Research for Wheat / National Key Laboratory of Wheat and Maize Crop Science, Zhengzhou, Henan, China
| | - Zhitao Liu
- Nanjing Agricultural University, State key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing, Jiangsu, China.,Sichuan Academy of Agricultural Sciences, Crop Research Institue, Chengdu, Sichuan, China
| | - Xinyi Huang
- Nanjing Agricultural University, State key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing, Jiangsu, China
| | - Nan Wu
- Nanjing Agricultural University, State key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing, Jiangsu, China
| | - Junhang An
- Henan Agricultural University, National Centre of Engineering and Technological Research for Wheat / National Key Laboratory of Wheat and Maize Crop Science, Zhengzhou, Henan, China
| | - Junchang Li
- Henan Agricultural University, National Centre of Engineering and Technological Research for Wheat / National Key Laboratory of Wheat and Maize Crop Science, Zhengzhou, Henan, China
| | - Jing Zhang
- Henan Agricultural University, National Centre of Engineering and Technological Research for Wheat / National Key Laboratory of Wheat and Maize Crop Science, Zhengzhou, Henan, China
| | - Yumei Jiang
- Henan Agricultural University, National Centre of Engineering and Technological Research for Wheat / National Key Laboratory of Wheat and Maize Crop Science, Zhengzhou, Henan, China
| | - Qiaoyun Li
- Henan Agricultural University, National Centre of Engineering and Technological Research for Wheat / National Key Laboratory of Wheat and Maize Crop Science, Zhengzhou, Henan, China
| | - Zengjun Qi
- Nanjing Agricultural University, State key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing, Jiangsu, China
| | - Jishan Niu
- Henan Agricultural University, National Centre of Engineering and Technological Research for Wheat / National Key Laboratory of Wheat and Maize Crop Science, Zhengzhou, Henan, China
| |
Collapse
|
6
|
Lu N, Lu M, Liu P, Xu H, Qiu X, Hu S, Wu Y, Bai S, Wu J, Xue S. Fine Mapping a Broad-Spectrum Powdery Mildew Resistance Gene in Chinese Landrace Datoumai, PmDTM, and Its Relationship with Pm24. PLANT DISEASE 2020; 104:1709-1714. [PMID: 32289249 DOI: 10.1094/pdis-11-19-2431-re] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Powdery mildew, caused by the biotrophic fungal pathogen Blumeria graminis f. sp. tritici (Bgt), is a globally important wheat disease causing severe yield losses, and deployment of resistant varieties is the preferred choice for managing this disease. Chinese wheat landrace Datoumai was resistant to 22 of 23 Bgt isolates at the seedling stage. Genetic analysis based on the inoculation of Bgt isolate E09 on the F1, F2, and F2:3 populations derived from the cross Datoumai × Huixianhong revealed that the powdery mildew resistance of Datoumai is controlled by a single dominant gene, temporarily designated as PmDTM. Bulked segregant analysis and simple sequence repeat mapping with 200 F2 plants showed that PmDTM was located in the same genetic region as Pm24 on chromosome 1DS. To fine map PmDTM, 12 critical recombinants were identified from 1,192 F2 plants and delimited PmDTM to a 0.5-cM Xhnu58800 to Xhnu59000 interval covering 180.5 Kb (38,728,125 to 38,908,656 bp) on chromosome 1DS, and only one highly confident gene, TraesCS1D02G058900, was annotated within this region. TraesCS1D02G058900 encodes a receptor-like serine/threonine-protein kinase (STK), and a 6-bp deletion in exon 5 may confer the resistance to powdery mildew. Allele frequency analysis indicated that the STK allele with 6-bp deletion was only present in three landraces (Datoumai, Chiyacao [Pm24], and Hulutou) and was absent in all of the 353 Chinese modern cultivars and 147 foreign cultivars. These results demonstrate that PmDTM is mapped to the same locus as Pm24 and can be widely used to enhance powdery mildew resistance in wheat growing regions worldwide.
Collapse
Affiliation(s)
- Nan Lu
- State Key Laboratory of Crop Stress Adaptation and Improvement, State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng 475004, Henan, China
- Applied Plant Genomics Laboratory, Crop Genomics and Bioinformatics Centre, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
| | - Mingxue Lu
- State Key Laboratory of Crop Stress Adaptation and Improvement, State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng 475004, Henan, China
| | - Pan Liu
- State Key Laboratory of Crop Stress Adaptation and Improvement, State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng 475004, Henan, China
| | - Hongxing Xu
- State Key Laboratory of Crop Stress Adaptation and Improvement, State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng 475004, Henan, China
| | - Xiaolong Qiu
- State Key Laboratory of Crop Stress Adaptation and Improvement, State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng 475004, Henan, China
| | - Shanshan Hu
- State Key Laboratory of Crop Stress Adaptation and Improvement, State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng 475004, Henan, China
| | - Yanan Wu
- State Key Laboratory of Crop Stress Adaptation and Improvement, State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng 475004, Henan, China
| | - Shenglong Bai
- State Key Laboratory of Crop Stress Adaptation and Improvement, State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng 475004, Henan, China
| | - Jizhong Wu
- Institute of Germplasm Resources and Biotechnology, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, Jiangsu, China
| | - Shulin Xue
- State Key Laboratory of Crop Stress Adaptation and Improvement, State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng 475004, Henan, China
| |
Collapse
|
7
|
Zhao X, Bai S, Li L, Han X, Li J, Zhu Y, Fang Y, Zhang D, Li S. Comparative Transcriptome Analysis of Two Aegilops tauschii with Contrasting Drought Tolerance by RNA-Seq. Int J Mol Sci 2020; 21:ijms21103595. [PMID: 32438769 PMCID: PMC7279474 DOI: 10.3390/ijms21103595] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 05/13/2020] [Accepted: 05/16/2020] [Indexed: 01/03/2023] Open
Abstract
As the diploid progenitor of common wheat, Aegilops tauschii is considered to be a valuable resistance source to various biotic and abiotic stresses. However, little has been reported concerning the molecular mechanism of drought tolerance in Ae. tauschii. In this work, the drought tolerance of 155 Ae. tauschii accessions was firstly screened on the basis of their coleoptile lengths under simulated drought stress. Subsequently, two accessions (XJ002 and XJ098) with contrasting coleoptile lengths were selected and intensively analyzed on rate of water loss (RWL) as well as physiological characters, confirming the difference in drought tolerance at the seedling stage. Further, RNA-seq was utilized for global transcriptome profiling of the two accessions seedling leaves under drought stress conditions. A total of 6969 differentially expressed genes (DEGs) associated with drought tolerance were identified, and their functional annotations demonstrated that the stress response was mediated by pathways involving alpha-linolenic acid metabolism, starch and sucrose metabolism, peroxisome, mitogen-activated protein kinase (MAPK) signaling, carbon fixation in photosynthetic organisms, and glycerophospholipid metabolism. In addition, DEGs with obvious differences between the two accessions were intensively analyzed, indicating that the expression level of DEGs was basically in alignment with the physiological changes of Ae. tauschii under drought stress. The results not only shed fundamental light on the regulatory process of drought tolerance in Ae. tauschii, but also provide a new gene resource for improving the drought tolerance of common wheat.
Collapse
Affiliation(s)
- Xinpeng Zhao
- Key Laboratory of Plant Stress Biology, State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng 475001, China; (X.Z.); (S.B.); (L.L.); (X.H.); (J.L.); (Y.Z.); (S.L.)
| | - Shenglong Bai
- Key Laboratory of Plant Stress Biology, State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng 475001, China; (X.Z.); (S.B.); (L.L.); (X.H.); (J.L.); (Y.Z.); (S.L.)
| | - Lechen Li
- Key Laboratory of Plant Stress Biology, State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng 475001, China; (X.Z.); (S.B.); (L.L.); (X.H.); (J.L.); (Y.Z.); (S.L.)
| | - Xue Han
- Key Laboratory of Plant Stress Biology, State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng 475001, China; (X.Z.); (S.B.); (L.L.); (X.H.); (J.L.); (Y.Z.); (S.L.)
| | - Jiahui Li
- Key Laboratory of Plant Stress Biology, State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng 475001, China; (X.Z.); (S.B.); (L.L.); (X.H.); (J.L.); (Y.Z.); (S.L.)
| | - Yumeng Zhu
- Key Laboratory of Plant Stress Biology, State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng 475001, China; (X.Z.); (S.B.); (L.L.); (X.H.); (J.L.); (Y.Z.); (S.L.)
| | - Yuan Fang
- College of Agriculture, Nanjing Agricultural University, Nanjing 210095, China;
| | - Dale Zhang
- Key Laboratory of Plant Stress Biology, State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng 475001, China; (X.Z.); (S.B.); (L.L.); (X.H.); (J.L.); (Y.Z.); (S.L.)
- Correspondence:
| | - Suoping Li
- Key Laboratory of Plant Stress Biology, State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng 475001, China; (X.Z.); (S.B.); (L.L.); (X.H.); (J.L.); (Y.Z.); (S.L.)
| |
Collapse
|