151
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Shi QS, Wang KQ, Li YL, Zhou L, Xiong SX, Han Y, Zhang YF, Yang NY, Yang ZN, Zhu J. OsPKS1 is required for sexine layer formation, which shows functional conservation between rice and Arabidopsis. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2018; 277:145-154. [PMID: 30466580 DOI: 10.1016/j.plantsci.2018.08.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 08/10/2018] [Accepted: 08/18/2018] [Indexed: 05/22/2023]
Abstract
The sporopollenin precursors, as a general constituent of sexine, are synthesized in the tapetum and deposited on the pollen surface after transportation and processing. The polyketide synthase condenses the acyl-CoA into a hydroxyalkyl α-pyrone, which is predicted to be a component of the sporopollenin precursors. In this study, we found that the rice POLYKETIDE SYNTHASE 1 (OsPKS1) was the orthologue of Arabidopsis POLYKETIDE SYNTHASE A/LESS ADHESIVE POLLEN 6 (PKSA/LAP6) through sequence alignment. The OsPKS1 knockout mutants obtained by Crispr-Cas9-mediated editing exhibited a complete male sterile phenotype. Cytological observations revealed that abnormal bacula deposition and ubisch body structures for sexine formation led to pollen rupture in ospks1. The expression analysis showed that the OsPKS1 was highly expressed in tapetal cells and anther locules from stage 9 to stage 11 during anther development in rice. Subcellular localization demonstrated that the OsPKS1 protein was preferentially localized to the ER. The genomic sequence of OsPKS1 driven by the PKSA/LAP6 promoter restored the sexine pattern of Arabidopsis pksa/lap6. These results indicated that OsPKS1 is required for sexine layer formation in rice and functionally conserved in the sporopollenin synthesis pathway.
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Affiliation(s)
- Qiang-Sheng Shi
- College of Life and Environment Sciences, Shanghai Normal University, 100 Guilin Road, Shanghai, 200234, China
| | - Kai-Qi Wang
- College of Life and Environment Sciences, Shanghai Normal University, 100 Guilin Road, Shanghai, 200234, China
| | - Yue-Ling Li
- Zhejiang Provincial Key Laboratory of Plant Evolutionary and Conservation, Taizhou University, Taizhou, China
| | - Lei Zhou
- College of Life and Environment Sciences, Shanghai Normal University, 100 Guilin Road, Shanghai, 200234, China
| | - Shuang-Xi Xiong
- College of Life and Environment Sciences, Shanghai Normal University, 100 Guilin Road, Shanghai, 200234, China
| | - Yu Han
- College of Life and Environment Sciences, Shanghai Normal University, 100 Guilin Road, Shanghai, 200234, China
| | - Yan-Fei Zhang
- College of Life and Environment Sciences, Shanghai Normal University, 100 Guilin Road, Shanghai, 200234, China
| | - Nai-Ying Yang
- College of Life and Environment Sciences, Shanghai Normal University, 100 Guilin Road, Shanghai, 200234, China
| | - Zhong-Nan Yang
- College of Life and Environment Sciences, Shanghai Normal University, 100 Guilin Road, Shanghai, 200234, China
| | - Jun Zhu
- College of Life and Environment Sciences, Shanghai Normal University, 100 Guilin Road, Shanghai, 200234, China.
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152
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Tabara M, Ohtani M, Kanekatsu M, Moriyama H, Fukuhara T. Size Distribution of Small Interfering RNAs in Various Organs at Different Developmental Stages is Primarily Determined by the Dicing Activity of Dicer-Like Proteins in Plants. PLANT & CELL PHYSIOLOGY 2018; 59:2228-2238. [PMID: 30032266 DOI: 10.1093/pcp/pcy144] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 07/16/2018] [Indexed: 06/08/2023]
Abstract
RNA silencing is a fundamental mechanism to maintain plant growth and development, and regulation of the size distribution of small interfering RNAs (siRNAs) is critical in the control of normal gene expression throughout a plant's life cycle. However, the cause of organ- and developmental stage-specific accumulation of siRNAs has never been reported. Whereas 24 nt siRNAs accumulated about 5.3-fold more than 21 nt siRNAs in Arabidopsis rosette leaves, 21 and 24 nt siRNAs accumulated to similar levels in Arabidopsis pollen grains, rice spikelets and maize anthers. We successfully detected two distinct double-stranded RNA (dsRNA)-cleaving activities that produced 21 and 24 nt RNAs in cell-free extracts prepared from various organs at different developmental stages of A. thaliana, Brassica rapa, rice and maize. Although DCL4 transcript was expressed more than DCL3 transcript in most organs, the 21 nt RNA-producing activity of DCL4 or its orthologs was very low and was 5- to 10-fold lower than the 24 nt RNA-producing activity of DCL3 or its orthologs particularly in leaves, indicating that DCL4 activity is negatively regulated translationally or post-translationally in leaves. High dicing activity of DCL3 and DCL4 was detected in immature inflorescences, developing seeds, germinating embryos and callus, all of which contain actively dividing cells. In various organs at different developmental stages, the size distribution of siRNAs was positively correlated with the dicing activity of two Dicers, DCL3 and DCL4, or their orthologs. Taken together, the size distribution of siRNAs in most organs is primarily determined by the dicing activity of DCL3 and DCL4.
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Affiliation(s)
- Midori Tabara
- Department of Applied Biological Sciences, Tokyo University of Agriculture and Technology, 3-5-8 Saiwaicho, Fuchu, Tokyo, Japan
| | - Misato Ohtani
- Graduate School of Science and Technology, Nara Institute of Science and Technology, 8916-5 Takayama-cho, Ikoma, Japan
- RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Japan
| | - Motoki Kanekatsu
- Department of Biological Production Science, Tokyo University of Agriculture and Technology, 3-5-8 Saiwaicho, Fuchu, Tokyo, Japan
| | - Hiromitsu Moriyama
- Department of Applied Biological Sciences, Tokyo University of Agriculture and Technology, 3-5-8 Saiwaicho, Fuchu, Tokyo, Japan
| | - Toshiyuki Fukuhara
- Department of Applied Biological Sciences, Tokyo University of Agriculture and Technology, 3-5-8 Saiwaicho, Fuchu, Tokyo, Japan
- Institute of Global Innovation Research, Tokyo University of Agriculture and Technology, 3-5-8 Saiwaicho, Fuchu, Tokyo, Japan
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153
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Chang Z, Jin M, Yan W, Chen H, Qiu S, Fu S, Xia J, Liu Y, Chen Z, Wu J, Tang X. The ATP-binding cassette (ABC) transporter OsABCG3 is essential for pollen development in rice. RICE (NEW YORK, N.Y.) 2018; 11:58. [PMID: 30311098 PMCID: PMC6181869 DOI: 10.1186/s12284-018-0248-8] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Accepted: 09/14/2018] [Indexed: 05/18/2023]
Abstract
BACKGROUND The pollen wall, which protects male gametophyte against various stresses and facilitates pollination, is essential for successful reproduction in flowering plants. The pollen wall consists of gametophyte-derived intine and sporophyte-derived exine. From outside to inside of exine are tectum, bacula, nexine I and nexine II layers. How these structural layers are formed has been under extensive studies, but the molecular mechanisms remain obscure. RESULTS Here we identified two osabcg3 allelic mutants and demonstrated that OsABCG3 was required for pollen development in rice. OsABCG3 encodes a half-size ABCG transporter localized on the plasma membrane. It was mainly expressed in anther when exine started to form. Loss-function of OsABCG3 caused abnormal degradation of the tapetum. The mutant pollen lacked the nexine II and intine layers, and shriveled without cytoplasm. The expression of some genes required for pollen wall formation was examined in osabcg3 mutants. The mutation did not alter the expression of the regulatory genes and lipid metabolism genes, but altered the expression of lipid transport genes. CONCLUSIONS Base on the genetic and cytological analyses, OsABCG3 was proposed to transport the tapetum-produced materials essential for pollen wall formation. This study provided a new perspective to the genetic regulation of pollen wall development.
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Affiliation(s)
- Zhenyi Chang
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou, 510631 China
- Shenzhen Institute of Molecular Crop Design, Shenzhen, 518107 China
| | - Mingna Jin
- Shenzhen Institute of Molecular Crop Design, Shenzhen, 518107 China
| | - Wei Yan
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou, 510631 China
- Shenzhen Institute of Molecular Crop Design, Shenzhen, 518107 China
- School of Life Sciences, Capital Normal University, Beijing, 10048 China
| | - Hui Chen
- Shenzhen Institute of Molecular Crop Design, Shenzhen, 518107 China
| | - Shijun Qiu
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou, 510631 China
- Shenzhen Institute of Molecular Crop Design, Shenzhen, 518107 China
| | - Shan Fu
- State Key Laboratory of Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning, 53004 China
| | - Jixing Xia
- State Key Laboratory of Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning, 53004 China
| | - Yuchen Liu
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou, 510631 China
- Shenzhen Institute of Molecular Crop Design, Shenzhen, 518107 China
| | - Zhufeng Chen
- Shenzhen Institute of Molecular Crop Design, Shenzhen, 518107 China
| | - Jianxin Wu
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou, 510631 China
| | - Xiaoyan Tang
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou, 510631 China
- Shenzhen Institute of Molecular Crop Design, Shenzhen, 518107 China
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154
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Wang F, Zhong X, Huang L, Fang W, Chen F, Teng N. Cellular and molecular characteristics of pollen abortion in chrysanthemum cv. Kingfisher. PLANT MOLECULAR BIOLOGY 2018; 98:233-247. [PMID: 30203234 DOI: 10.1007/s11103-018-0777-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Accepted: 09/04/2018] [Indexed: 05/21/2023]
Abstract
Microspore degeneration at the tetrad stage is associated with tapetum degeneration retardation. Some genes and proteins related to cell senescence and death are the key factors for pollen abortion. Chrysanthemum (Chrysanthemum morifolium) is a major floriculture crop in the world, but pollen contamination is an urgent problem to be solved in chrysanthemum production. C. morifolium 'Kingfisher' is a chrysanthemum cultivar that does not contain any pollen in mature anthers, thus it is a very important material for developing chrysanthemum without pollen contamination. However, the mechanism of its pollen abortion remains unclear. In this study, the cellular and molecular mechanisms of 'Kingfisher' pollen abortion were investigated using transmission electron microscopy, RNA sequencing, isobaric tags for relative and absolute quantitation, and bioinformatics. It was found that the meiosis of microspore mother cells was normal before the tetrad stage, the microspores began to degenerate at the tetrad stage, and no microspores were observed in the anthers after the tetrad stage. In addition, transcriptomic and proteomic analyses showed that some genes and proteins related to cell senescence and death were identified to be implicated in chrysanthemum pollen abortion. These results indicated that the tetrad stage was the main period of pollen abortion, and the genes and proteins related to cell senescence and death contributed to pollen abortion. These add to our understanding of chrysanthemum pollen abortion and will be helpful for development of flowers without pollen contamination in the future.
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Affiliation(s)
- Fan Wang
- College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
- Key Laboratory of Landscaping Agriculture, Ministry of Agriculture, Nanjing, 210095, China
| | - Xinghua Zhong
- College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
- Key Laboratory of Landscaping Agriculture, Ministry of Agriculture, Nanjing, 210095, China
| | - Lulu Huang
- College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
- Key Laboratory of Landscaping Agriculture, Ministry of Agriculture, Nanjing, 210095, China
| | - Weimin Fang
- College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
- Key Laboratory of Landscaping Agriculture, Ministry of Agriculture, Nanjing, 210095, China
| | - Fadi Chen
- College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
- Key Laboratory of Landscaping Agriculture, Ministry of Agriculture, Nanjing, 210095, China
| | - Nianjun Teng
- College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China.
- Key Laboratory of Landscaping Agriculture, Ministry of Agriculture, Nanjing, 210095, China.
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155
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Yao M, Ai TB, Mao Q, Chen F, Li FS, Tang L. Downregulation of OsAGO17 by artificial microRNA causes pollen abortion resulting in the reduction of grain yield in rice. ELECTRON J BIOTECHN 2018. [DOI: 10.1016/j.ejbt.2018.07.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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156
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Chen J, Su P, Chen P, Li Q, Yuan X, Liu Z. Insights into the cotton anther development through association analysis of transcriptomic and small RNA sequencing. BMC PLANT BIOLOGY 2018; 18:154. [PMID: 30075747 PMCID: PMC6091077 DOI: 10.1186/s12870-018-1376-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Accepted: 07/30/2018] [Indexed: 05/10/2023]
Abstract
BACKGROUND Plant anther development is a systematic and complex process precisely controlled by genes. Regulation genes and their regulatory mechanisms for this process remain elusive. In contrast to numerous researches on anther development with respect to mRNAs or miRNAs in many crops, the association analysis combining both omics has not been reported on cotton anther. RESULTS In this study, the molecular mechanism of cotton anther development was investigated with the employment of association analysis of transcriptome and small RNA sequencing during the predefined four stages of cotton anther development, sporogenuous cell proliferation (SCP), meiotic phase (MP), microspore release period (MRP) and pollen maturity (PM). Analysis revealed that the differentially expressed genes are increasingly recruited along with the developmental progress. Expression of functional genes differed significantly among developmental stages. The genes related with cell cycle, progesterone-mediated oocyte maturation, and meiosis are predominantly expressed at the early stage of anther development (SCP and MP), and the expression of genes involved in energy metabolism, flavonoid biosynthesis, axon guidance and phospholipase D signaling pathways is mainly enriched at the late stage of anther development (MRP and PM). Analysis of expression patterns revealed that there was the largest number of differentially expressed genes in the MP and the expression profiles of differentially expressed genes were significantly increased, which implied the importance of MP in the entire anther development cycle. In addition, prediction and analysis of miRNA targeted genes suggested that miRNAs play important roles in anther development. The miRNAs ghr-miR393, Dt_chr12_6065 and At_chr9_3080 participated in cell cycle, carbohydrate metabolism and auxin anabolism through the target genes, respectively, to achieve the regulation of anther development. CONCLUSIONS Through the association analysis of mRNA and miRNA, our work gives a better understanding of the preferentially expressed genes and regulation in different developmental stages of cotton anther and the importance of meiotic phase, and also the involvement of miRNAs in precise regulation for this process, which would be valuable for clarifying the mechanism of plant anther development in response to internal and external environments.
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Affiliation(s)
- Jin Chen
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128 China
| | - Pin Su
- Hunan Academy of Agricultural Sciences, Institute of Plant Protection, Changsha, 410125 China
| | - Pengyun Chen
- State Key Laboratory of Cotton Biology, Institute of Cotton Research of CAAS, Anyang, 455000 China
| | - Qiong Li
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128 China
| | - Xiaoling Yuan
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128 China
| | - Zhi Liu
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128 China
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157
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Song S, Chen Y, Liu L, See YHB, Mao C, Gan Y, Yu H. OsFTIP7 determines auxin-mediated anther dehiscence in rice. NATURE PLANTS 2018; 4:495-504. [PMID: 29915329 DOI: 10.1038/s41477-018-0175-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Accepted: 05/11/2018] [Indexed: 05/06/2023]
Abstract
Anther dehiscence determines successful sexual reproduction of flowering plants through timely release of pollen grains for pollination and fertilization. Downregulation of auxin levels during pollen mitosis is essential for promoting anther dehiscence along with pollen maturation. How this key transition of auxin levels is regulated in male organs remains elusive. Here, we report that the rice FT-INTERACTING PROTEIN 7 is highly expressed in anthers before pollen mitotic divisions and facilitates nuclear translocation of a homeodomain transcription factor, Oryza sativa homeobox 1, which directly suppresses a predominant auxin biosynthetic gene, OsYUCCA4, during the late development of anthers. This confers a key switch of auxin levels between meiosis of microspore mother cells and pollen mitotic divisions, thus controlling the timing of anther dehiscence during rice anthesis. Our findings shed light on the mechanism of hormonal control of anther dehiscence, and provide a new avenue for creating hormone-sensitive male sterile lines for hybrid plant breeding.
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Affiliation(s)
- Shiyong Song
- Department of Biological Sciences and Temasek Life Sciences Laboratory, National University of Singapore, Singapore, Singapore
| | - Ying Chen
- Department of Biological Sciences and Temasek Life Sciences Laboratory, National University of Singapore, Singapore, Singapore
| | - Lu Liu
- Department of Biological Sciences and Temasek Life Sciences Laboratory, National University of Singapore, Singapore, Singapore
| | - Yen How Benjamin See
- Department of Biological Sciences and Temasek Life Sciences Laboratory, National University of Singapore, Singapore, Singapore
| | - Chuanzao Mao
- College of Life Science, Zhejiang University, Hangzhou, China
| | - Yinbo Gan
- College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Hao Yu
- Department of Biological Sciences and Temasek Life Sciences Laboratory, National University of Singapore, Singapore, Singapore.
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158
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Zou T, Liu M, Xiao Q, Wang T, Chen D, Luo T, Yuan G, Li Q, Zhu J, Liang Y, Deng Q, Wang S, Zheng A, Wang L, Li P, Li S. OsPKS2 is required for rice male fertility by participating in pollen wall formation. PLANT CELL REPORTS 2018; 37:759-773. [PMID: 29411094 DOI: 10.1007/s00299-018-2265-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Accepted: 01/30/2018] [Indexed: 05/07/2023]
Abstract
OsPKS2, the rice orthologous gene of Arabidopsis PKSB/LAP5, encodes a polyketide synthase that is involved in pollen wall formation in rice. In flowering plants, the pollen wall protects male gametes from various environmental stresses and pathogen attacks, as well as promotes pollen germination. The biosynthesis of sporopollenin in tapetal cell is critical for pollen wall formation. Recently, progress has been made in understanding sporopollenin metabolism during pollen wall development in Arabidopsis. However, little is known about the molecular mechanism that underlies the sporopollenin synthesis in pollen wall formation in rice (Oryza sativa). In this study, we identified that a point mutation in OsPKS2, a plant-specific type III polyketide synthase gene, caused male sterility in rice by affecting the normal progress of pollen wall formation. Two other allelic mutants of OsPKS2 were generated using the CRISPR/Cas9 system and are also completely male sterile. This result thus further confirmed that OsPKS2 controls rice male fertility. We also showed that OsPKS2 is an orthologous gene of Arabidopsis PKSB/LAP5 and has a tapetum-specific expression pattern. In addition, its product localizes in the endoplasmic reticulum. Results suggested that OsPKS2 is critical for pollen wall formation, and plays a conserved but differentiated role in sporopollenin biosynthesis from Arabidopsis.
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Affiliation(s)
- Ting Zou
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, 611130, Sichuan, China
- Chongqing Key Laboratory of Economic Plant Biotechnology, Collaborative Innovation Center of Special Plant Industry in Chongqing, Institute of Special Plants, Chongqing University of Arts and Sciences, Yongchuan, 402160, China
| | - Mingxing Liu
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, 611130, Sichuan, China
| | - Qiao Xiao
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, 611130, Sichuan, China
| | - Tao Wang
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, 611130, Sichuan, China
| | - Dan Chen
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, 611130, Sichuan, China
| | - Tao Luo
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, 611130, Sichuan, China
| | - Guoqiang Yuan
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, 611130, Sichuan, China
| | - Qiao Li
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, 611130, Sichuan, China
- Chongqing Key Laboratory of Economic Plant Biotechnology, Collaborative Innovation Center of Special Plant Industry in Chongqing, Institute of Special Plants, Chongqing University of Arts and Sciences, Yongchuan, 402160, China
| | - Jun Zhu
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, 611130, Sichuan, China
- State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Changsha, 410125, China
| | - Yueyang Liang
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, 611130, Sichuan, China
| | - Qiming Deng
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, 611130, Sichuan, China
| | - Shiquan Wang
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, 611130, Sichuan, China
| | - Aiping Zheng
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, 611130, Sichuan, China
| | - Lingxia Wang
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, 611130, Sichuan, China
| | - Ping Li
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China.
- Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, 611130, Sichuan, China.
- State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Changsha, 410125, China.
| | - Shuangcheng Li
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China.
- Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, 611130, Sichuan, China.
- State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Changsha, 410125, China.
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159
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Bhatnagar-Mathur P, Gupta R, Reddy PS, Reddy BP, Reddy DS, Sameerkumar CV, Saxena RK, Sharma KK. A novel mitochondrial orf147 causes cytoplasmic male sterility in pigeonpea by modulating aberrant anther dehiscence. PLANT MOLECULAR BIOLOGY 2018; 97:131-147. [PMID: 29667000 DOI: 10.1007/s11103-018-0728-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Accepted: 04/06/2018] [Indexed: 06/08/2023]
Abstract
KEY MESSAGE A novel open reading frame (ORF) identified and cloned from the A4 cytoplasm of Cajanus cajanifolius induced partial to complete male sterility when introduced into Arabidopsis and tobacco. Pigeonpea (Cajanus cajan L. Millsp.) is the only legume known to have commercial hybrid seed technology based on cytoplasmic male sterility (CMS). We identified a novel ORF (orf147) from the A4 cytoplasm of C. cajanifolius that was created via rearrangements in the CMS line and co-transcribes with the known and unknown sequences. The bi/poly-cistronic transcripts cause gain-of-function variants in the mitochondrial genome of CMS pigeonpea lines having distinct processing mechanisms and transcription start sites. In presence of orf147, significant repression of Escherichia coli growth indicated its toxicity to the host cells and induced partial to complete male sterility in transgenic progenies of Arabidopsis thaliana and Nicotiana tabacum where phenotype co-segregated with the transgene. The male sterile plants showed aberrant floral development and reduced lignin content in the anthers. Gene expression studies in male sterile pigeonpea, Arabidopsis and tobacco plants confirmed down-regulation of several anther biogenesis genes and key genes involved in monolignol biosynthesis, indicative of regulation of retrograde signaling. Besides providing evidence for the involvement of orf147 in pigeonpea CMS, this study provides valuable insights into its function. Cytotoxicity and aberrant programmed cell death induced by orf147 could be important for mechanism underlying male sterility that offers opportunities for possible translation for these findings for exploiting hybrid vigor in other recalcitrant crops as well.
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Affiliation(s)
- Pooja Bhatnagar-Mathur
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, Hyderabad, Telangana, 502324, India.
| | - Ranadheer Gupta
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, Hyderabad, Telangana, 502324, India
| | - Palakolanu Sudhakar Reddy
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, Hyderabad, Telangana, 502324, India
| | - Bommineni Pradeep Reddy
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, Hyderabad, Telangana, 502324, India
| | - Dumbala Srinivas Reddy
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, Hyderabad, Telangana, 502324, India
| | - C V Sameerkumar
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, Hyderabad, Telangana, 502324, India
| | - Rachit Kumar Saxena
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, Hyderabad, Telangana, 502324, India
| | - Kiran K Sharma
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, Hyderabad, Telangana, 502324, India.
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160
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Moon S, Oo MM, Kim B, Koh HJ, Oh SA, Yi G, An G, Park SK, Jung KH. Genome-wide analyses of late pollen-preferred genes conserved in various rice cultivars and functional identification of a gene involved in the key processes of late pollen development. RICE (NEW YORK, N.Y.) 2018; 11:28. [PMID: 29687350 PMCID: PMC5913055 DOI: 10.1186/s12284-018-0219-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Accepted: 04/04/2018] [Indexed: 05/19/2023]
Abstract
BACKGROUND Understanding late pollen development, including the maturation and pollination process, is a key component in maintaining crop yields. Transcriptome data obtained through microarray or RNA-seq technologies can provide useful insight into those developmental processes. Six series of microarray data from a public transcriptome database, the Gene Expression Omnibus of the National Center for Biotechnology Information, are related to anther and pollen development. RESULTS We performed a systematic and functional study across the rice genome of genes that are preferentially expressed in the late stages of pollen development, including maturation and germination. By comparing the transcriptomes of sporophytes and male gametes over time, we identified 627 late pollen-preferred genes that are conserved among japonica and indica rice cultivars. Functional classification analysis with a MapMan tool kit revealed a significant association between cell wall organization/metabolism and mature pollen grains. Comparative analysis of rice and Arabidopsis demonstrated that genes involved in cell wall modifications and the metabolism of major carbohydrates are unique to rice. We used the GUS reporter system to monitor the expression of eight of those genes. In addition, we evaluated the significance of our candidate genes, using T-DNA insertional mutant population and the CRISPR/Cas9 system. Mutants from T-DNA insertion and CRISPR/Cas9 systems of a rice gene encoding glycerophosphoryl diester phosphodiesterase are defective in their male gamete transfer. CONCLUSION Through the global analyses of the late pollen-preferred genes from rice, we found several biological features of these genes. First, biological process related to cell wall organization and modification is over-represented in these genes to support rapid tube growth. Second, comparative analysis of late pollen preferred genes between rice and Arabidopsis provide a significant insight on the evolutional disparateness in cell wall biogenesis and storage reserves of pollen. In addition, these candidates might be useful targets for future examinations of late pollen development, and will be a valuable resource for accelerating the understanding of molecular mechanisms for pollen maturation and germination processes in rice.
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Affiliation(s)
- Sunok Moon
- Graduate School of Biotechnology and Crop Biotech Institute, Kyung Hee University, Yongin, 446-701, South Korea
| | - Moe Moe Oo
- School of Applied Biosciences, Kyungpook National University, Daegu, 702-701, South Korea
| | - Backki Kim
- Department of Plant Science, Research Institute of Agriculture and Life Sciences, and Plant Genomics and Breeding Institute, Seoul National University, Seoul, 151-921, South Korea
| | - Hee-Jong Koh
- Department of Plant Science, Research Institute of Agriculture and Life Sciences, and Plant Genomics and Breeding Institute, Seoul National University, Seoul, 151-921, South Korea
| | - Sung Aeong Oh
- School of Applied Biosciences, Kyungpook National University, Daegu, 702-701, South Korea
| | - Gihwan Yi
- College of Agriculture and Life Science, Daegu, 702-701, South Korea
| | - Gynheung An
- Graduate School of Biotechnology and Crop Biotech Institute, Kyung Hee University, Yongin, 446-701, South Korea
| | - Soon Ki Park
- School of Applied Biosciences, Kyungpook National University, Daegu, 702-701, South Korea.
| | - Ki-Hong Jung
- Graduate School of Biotechnology and Crop Biotech Institute, Kyung Hee University, Yongin, 446-701, South Korea.
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161
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Identification of Wheat Inflorescence Development-Related Genes Using a Comparative Transcriptomics Approach. Int J Genomics 2018; 2018:6897032. [PMID: 29581960 PMCID: PMC5822904 DOI: 10.1155/2018/6897032] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 11/26/2017] [Accepted: 12/03/2017] [Indexed: 12/14/2022] Open
Abstract
Inflorescence represents the highly specialized plant tissue producing the grains. Although key genes regulating flower initiation and development are conserved, the mechanism regulating fertility is still not well explained. To identify genes and gene network underlying inflorescence morphology and fertility of bread wheat, expressed sequence tags (ESTs) from different tissues were analyzed using a comparative transcriptomics approach. Based on statistical comparison of EST frequencies of individual genes in EST pools representing different tissues and verification with RT-PCR and RNA-seq data, 170 genes of 59 gene sets predominantly expressed in the inflorescence were obtained. Nearly one-third of the gene sets displayed differentiated expression profiles in terms of their subgenome orthologs. The identified genes, most of which were predominantly expressed in anthers, encode proteins involved in wheat floral identity determination, anther and pollen development, pollen-pistil interaction, and others. Particularly, 25 annotated gene sets are associated with pollen wall formation, of which 18 encode enzymes or proteins participating in lipid metabolic pathway, including fatty acid ω-hydroxylation, alkane and fatty alcohol biosynthesis, and glycerophospholipid metabolism. We showed that the comparative transcriptomics approach was effective in identifying genes for reproductive development and found that lipid metabolism was particularly active in wheat anthers.
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162
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Cai W, Zhang D. The role of receptor-like kinases in regulating plant male reproduction. PLANT REPRODUCTION 2018; 31:77-87. [PMID: 29508076 DOI: 10.1007/s00497-018-0332-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Accepted: 02/19/2018] [Indexed: 05/21/2023]
Abstract
RLKs in anther development. The cell-to-cell communication is essential for specifying different cell types during plant growth, development and adaption to the ever-changing environment. Plant male reproduction, in particular, requires the exquisitely synchronized development of different cell layers within the male tissue, the anther. Receptor-like kinases (RLKs) belong to a large group of kinases localized on the cell surfaces, perceiving extracellular signals and thereafter regulating intracellular processes. Here we update the role of RLKs in early anther development by defining the cell fate and anther patterning, responding to the changing environment and controlling anther carbohydrate metabolism. We provide speculation of the poorly characterized ligands and substrates of these RLKs. The conserved and diversified aspects underlying the function of RLKs in anther development are discussed.
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Affiliation(s)
- Wenguo Cai
- Joint International Research Laboratory of Metabolic and Developmental Sciences, State Key Laboratory of Hybrid Rice, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Dabing Zhang
- Joint International Research Laboratory of Metabolic and Developmental Sciences, State Key Laboratory of Hybrid Rice, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China.
- School of Agriculture, Food and Wine, University of Adelaide, Urrbrae, SA, 5064, Australia.
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163
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Xue Z, Xu X, Zhou Y, Wang X, Zhang Y, Liu D, Zhao B, Duan L, Qi X. Deficiency of a triterpene pathway results in humidity-sensitive genic male sterility in rice. Nat Commun 2018; 9:604. [PMID: 29426861 PMCID: PMC5807508 DOI: 10.1038/s41467-018-03048-8] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 01/16/2018] [Indexed: 11/26/2022] Open
Abstract
In flowering plants, the pollen coat protects the released male germ cells from desiccation and damage during pollination. However, we know little about the mechanism by which the chemical composition of the pollen coat prevents dehydration of pollen grains. Here we report that deficiency of a grass conserved triterpene synthase, OsOSC12/OsPTS1, in rice leads to failure of pollen coat formation. The mutant plants are male sterile at low relative humidity (RH < 60%), but fully male fertile at high relative humidity (>80%). The lack of three major fatty acids in the pollen coat results in rapid dehydration of pollen grains. We show that applying mixtures of linolenic acid and palmitic acid or stearic acid are able to prevent over-dehydration of mutant pollen grains. We propose that humidity-sensitive genic male sterility (HGMS) could be a desirable trait for hybrid breeding in rice, wheat, maize, and other crops. In flowering plants, the pollen coat surrounds the male germ cells and protects against dehydration, damage and pathogen attack. Here, the authors show that a deficiency in terpenoid synthesis results in rice pollen over-dehydration and leads to a humidity-sensitive conditional male sterile phenotype.
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Affiliation(s)
- Zheyong Xue
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Nanxincun 20, Fragrant Hill, Beijing, 100093, China
| | - Xia Xu
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Nanxincun 20, Fragrant Hill, Beijing, 100093, China.,University of Chinese Academy of Sciences, Yuquan Road 19, Beijing, 100049, China
| | - Yuan Zhou
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Nanxincun 20, Fragrant Hill, Beijing, 100093, China.,University of Chinese Academy of Sciences, Yuquan Road 19, Beijing, 100049, China
| | - Xiaoning Wang
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, 44 West Wenhua Road, Jinan, 250012, China
| | - Yingchun Zhang
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Nanxincun 20, Fragrant Hill, Beijing, 100093, China
| | - Dan Liu
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Nanxincun 20, Fragrant Hill, Beijing, 100093, China.,University of Chinese Academy of Sciences, Yuquan Road 19, Beijing, 100049, China
| | - Binbin Zhao
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Nanxincun 20, Fragrant Hill, Beijing, 100093, China
| | - Lixin Duan
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Nanxincun 20, Fragrant Hill, Beijing, 100093, China.,International Institute for Translational Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, 510006, Guangdong, China
| | - Xiaoquan Qi
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Nanxincun 20, Fragrant Hill, Beijing, 100093, China.
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164
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Yang Z, Zhang Y, Sun L, Zhang P, Liu L, Yu P, Xuan D, Xiang X, Wu W, Cao L, Cheng S. Identification of cyp703a3-3 and analysis of regulatory role of CYP703A3 in rice anther cuticle and pollen exine development. Gene 2018; 649:63-73. [PMID: 29355682 DOI: 10.1016/j.gene.2018.01.058] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Revised: 01/10/2018] [Accepted: 01/16/2018] [Indexed: 11/30/2022]
Abstract
Anther cuticle and pollen exine are two elaborated lipid-soluble barriers protecting pollen grains from environmental and biological stresses. However, less is known about the mechanisms underlying the synthesis of these lipidic polymers. Here, we identified a no-pollen male-sterility mutant cyp703a3-3 from the indica restorer line Zhonghui 8015 (Zh8015) mutant library treated with 60Coγ-ray radiation. Histological analysis indicated that cyp703a3-3 underwent abnormal tapetal cells development, produced few orbicules and secreted less sporopollenin precursors to anther locule, as well as cutin monomers on anther. Genetic analysis revealed that cyp703a3-3 was controlled by a single recessive gene. Map-based cloning was performed to narrow down the mutant gene to a 47.78-kb interval on the chromosome 8 between two markers S15-29 and S15-30. Sequence analysis detected three bases (GAA) deletion in the first exon of LOC_Os08g03682, annotated as CYP703A3 with homologous sequences related to male sterility in Arabidopsis, causing the Asparagine deletion in the mutant site. Moreover, we transformed genomic fragment of CYP703A3 into cyp703a3-3, which male-sterility phenotype was recovered. Both the wild-type and cyp703a3-3 mutant 3D structure of CYP703A3 protein were modeled. Results of qPCR suggested CYP703A3 mainly expressed in anthers with greatest abundance at microspore stage, and genes involved in sporopollenin precursors formation and transportation, such as GAMYB, TDR, CYP704B2, DPW2, OsABCG26 and OsABCG15, were significantly reduced in cyp703a3-3. Collectively, our results further elaborated CYP703A3 plays vital role in anther cuticle and pollen exine development in rice (Oryza sativa L.).
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Affiliation(s)
- Zhengfu Yang
- Key Laboratory for Zhejiang Super Rice Research & State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China; National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Yingxin Zhang
- Key Laboratory for Zhejiang Super Rice Research & State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China
| | - Lianping Sun
- Key Laboratory for Zhejiang Super Rice Research & State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China
| | - Peipei Zhang
- Key Laboratory for Zhejiang Super Rice Research & State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China; National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Ling Liu
- Key Laboratory for Zhejiang Super Rice Research & State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China
| | - Ping Yu
- Key Laboratory for Zhejiang Super Rice Research & State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China
| | - Dandan Xuan
- Key Laboratory for Zhejiang Super Rice Research & State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China
| | - Xiaojiao Xiang
- Key Laboratory for Zhejiang Super Rice Research & State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China; National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Weixun Wu
- Key Laboratory for Zhejiang Super Rice Research & State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China
| | - Liyong Cao
- Key Laboratory for Zhejiang Super Rice Research & State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China.
| | - Shihua Cheng
- Key Laboratory for Zhejiang Super Rice Research & State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China.
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165
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Zhang Z, Hu M, Feng X, Gong A, Cheng L, Yuan H. Proteomes and Phosphoproteomes of Anther and Pollen: Availability and Progress. Proteomics 2018; 17. [PMID: 28665021 DOI: 10.1002/pmic.201600458] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Revised: 06/02/2017] [Indexed: 12/24/2022]
Abstract
In flowering plants, anther development plays crucial role in sexual reproduction. Within the anther, microspore mother cells meiosis produces microspores, which further develop into pollen grains that play decisive role in plant reproduction. Previous studies on anther biology mainly focused on single gene functions relying on genetic and molecular methods. Recently, anther development has been expanded from multiple OMICS approaches like transcriptomics, proteomics/phosphoproteomics, and metabolomics. The development of proteomics techniques allowing increased proteome coverage and quantitative measurements of proteins which can characterize proteomes and their modulation during normal development, biotic and abiotic stresses in anther development. In this review, we summarize the achievements of proteomics and phosphoproteomics with anther and pollen organs from model plant and crop species (i.e. Arabidopsis, rice, tobacco). The increased proteomic information facilitated translation of information from the models to crops and thus aid in agricultural improvement.
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Affiliation(s)
- Zaibao Zhang
- Institute for Conservation and Utilization of Agro-bioresources in Dabie Mountains, Xinyang, Henan, P. R. China.,College of Life Science, Xinyang Normal College, Xinyang, Henan, P. R. China
| | - Menghui Hu
- Institute for Conservation and Utilization of Agro-bioresources in Dabie Mountains, Xinyang, Henan, P. R. China.,College of Life Science, Xinyang Normal College, Xinyang, Henan, P. R. China
| | - Xiaobing Feng
- Institute for Conservation and Utilization of Agro-bioresources in Dabie Mountains, Xinyang, Henan, P. R. China.,College of Life Science, Xinyang Normal College, Xinyang, Henan, P. R. China
| | - Andong Gong
- Institute for Conservation and Utilization of Agro-bioresources in Dabie Mountains, Xinyang, Henan, P. R. China.,College of Life Science, Xinyang Normal College, Xinyang, Henan, P. R. China
| | - Lin Cheng
- Institute for Conservation and Utilization of Agro-bioresources in Dabie Mountains, Xinyang, Henan, P. R. China.,College of Life Science, Xinyang Normal College, Xinyang, Henan, P. R. China
| | - Hongyu Yuan
- Institute for Conservation and Utilization of Agro-bioresources in Dabie Mountains, Xinyang, Henan, P. R. China.,College of Life Science, Xinyang Normal College, Xinyang, Henan, P. R. China
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166
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Li X, Ye J, Ma H, Lu P. Proteomic analysis of lysine acetylation provides strong evidence for involvement of acetylated proteins in plant meiosis and tapetum function. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2018; 93:142-154. [PMID: 29124795 DOI: 10.1111/tpj.13766] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2017] [Revised: 10/20/2017] [Accepted: 10/25/2017] [Indexed: 05/18/2023]
Abstract
Protein lysine acetylation (KAC) is a dynamic and reversible post-translational modification that has important biological roles in many organisms. Although KAC has been shown to affect reproductive development and meiosis in yeast and animals, similar studies are largely lacking in flowering plants, especially proteome-scale investigations for particular reproductive stages. Here, we report results from a proteomic investigation to detect the KAC status of the developing rice anthers near the time of meiosis (RAM), providing strong biochemical evidence for roles of many KAC-affected proteins during anther development and meiosis in rice. We identified a total of 1354 KAC sites in 676 proteins. Among these, 421 acetylated proteins with 629 KAC sites are novel, greatly enriching our knowledge on KAC in flowering plants. Gene Ontology enrichment analysis showed chromatin silencing, protein folding, fatty acid biosynthetic process and response to stress to be over-represented. In addition, certain potentially specific KAC motifs in RAM were detected. Importantly, 357 rice meiocyte proteins were acetylated; and four proteins genetically identified to be important for rice tapetum and pollen development were acetylated on 14 KAC sites in total. Furthermore, 47 putative secretory proteins were detected to exhibit acetylated status in RAM. Moreover, by comparing our lysine acetylome with the RAM phosphoproteome we obtained previously, we proposed a correlation between KAC and phosphorylation as a potential modulatory mechanism in rice RAM. This study provides the first global survey of KAC in plant reproductive development, making a promising starting point for further functional analysis of KAC during rice anther development and meiosis.
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Affiliation(s)
- Xiaojing Li
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center of Genetics and Development, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai, 200433, China
| | - Juanying Ye
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center of Genetics and Development, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai, 200433, China
| | - Hong Ma
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center of Genetics and Development, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai, 200433, China
| | - Pingli Lu
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center of Genetics and Development, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai, 200433, China
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167
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Ni E, Zhou L, Li J, Jiang D, Wang Z, Zheng S, Qi H, Zhou Y, Wang C, Xiao S, Liu Z, Zhou H, Zhuang C. OsCER1 Plays a Pivotal Role in Very-Long-Chain Alkane Biosynthesis and Affects Plastid Development and Programmed Cell Death of Tapetum in Rice ( Oryza sativa L.). FRONTIERS IN PLANT SCIENCE 2018; 9:1217. [PMID: 30237804 PMCID: PMC6136457 DOI: 10.3389/fpls.2018.01217] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Accepted: 07/30/2018] [Indexed: 05/07/2023]
Abstract
Cuticle waxes, which are primarily comprised of very-long-chain (VLC) alkanes, play an important role in plant reproductive development. ECERIFERUM1 (CER1) is recognized as the core element for VLC alkane biosynthesis in Arabidopsis (Arabidopsis thaliana). However, genes involved in the VLC alkane biosynthesis in rice remain unclear, and the alkane-form pathway in rice has still to be further explored. Here, we show that OsCER1, a homology of CER1, functions in VLC alkanes biosynthesis, which also could regulate anther development and plastids differentiation in rice. OsCER1 was highly expressed in the tapetum (stage 10) and bicellular pollen cells (stage 11). The decreased content of VLC alkanes (C25 and C27) in the OsCER1 knocked down plants as well as the increased content of C27 alkanes in the OsCER1 overexpression plants indicates that OsCER1 participates in VLC alkane biosynthesis. Downregulation of OsCER1 in rice led to sterility, and fewer amyloplasts within the mature pollen grains. In addition, the downregulation of OsCER1 in rice caused delayed tapetal programmed cell death and abnormal development of plastids in the tapetal cells. Furthermore, significantly altered levels of expression of genes involved in the pollen development were exhibited in the OsCER1 knocked down plants. These results indicate that OsCER1 is critical for VLC alkanes biosynthesis, plastids differentiation, and pollen development. This work provides insights into the VLC alkanes biosynthesis in anther development in rice.
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Affiliation(s)
- Erdong Ni
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources – Key Laboratory of Plant Functional Genomics and Biotechnology of Guangdong Provincial Higher Education Institutions, College of Life Sciences, South China Agricultural University, Guangzhou, China
| | - Lingyan Zhou
- Laboratory Center of Basic Biology and Biotechnology, Education Department of Guangdong Province, Zhongkai University of Agriculture and Engineering, Guangzhou, China
| | - Jing Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources – Key Laboratory of Plant Functional Genomics and Biotechnology of Guangdong Provincial Higher Education Institutions, College of Life Sciences, South China Agricultural University, Guangzhou, China
| | - Dagang Jiang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources – Key Laboratory of Plant Functional Genomics and Biotechnology of Guangdong Provincial Higher Education Institutions, College of Life Sciences, South China Agricultural University, Guangzhou, China
| | - Zhonghua Wang
- Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Yangling, China
| | - Shaoyan Zheng
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources – Key Laboratory of Plant Functional Genomics and Biotechnology of Guangdong Provincial Higher Education Institutions, College of Life Sciences, South China Agricultural University, Guangzhou, China
| | - Hua Qi
- State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Ying Zhou
- State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Cimei Wang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources – Key Laboratory of Plant Functional Genomics and Biotechnology of Guangdong Provincial Higher Education Institutions, College of Life Sciences, South China Agricultural University, Guangzhou, China
| | - Shi Xiao
- State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Zhenlan Liu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources – Key Laboratory of Plant Functional Genomics and Biotechnology of Guangdong Provincial Higher Education Institutions, College of Life Sciences, South China Agricultural University, Guangzhou, China
| | - Hai Zhou
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources – Key Laboratory of Plant Functional Genomics and Biotechnology of Guangdong Provincial Higher Education Institutions, College of Life Sciences, South China Agricultural University, Guangzhou, China
- *Correspondence: Hai Zhou, Chuxiong Zhuang,
| | - Chuxiong Zhuang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources – Key Laboratory of Plant Functional Genomics and Biotechnology of Guangdong Provincial Higher Education Institutions, College of Life Sciences, South China Agricultural University, Guangzhou, China
- *Correspondence: Hai Zhou, Chuxiong Zhuang,
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168
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Zou T, Xiao Q, Li W, Luo T, Yuan G, He Z, Liu M, Li Q, Xu P, Zhu J, Liang Y, Deng Q, Wang S, Zheng A, Wang L, Li P, Li S. OsLAP6/OsPKS1, an orthologue of Arabidopsis PKSA/LAP6, is critical for proper pollen exine formation. RICE (NEW YORK, N.Y.) 2017; 10:53. [PMID: 29282604 PMCID: PMC5745217 DOI: 10.1186/s12284-017-0191-0] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Accepted: 12/06/2017] [Indexed: 05/06/2023]
Abstract
BACKGROUND Male fertility is crucial for rice yield, and the improvement of rice yield requires hybrid production that depends on male sterile lines. Although recent studies have revealed several important genes in male reproductive development, our understanding of the mechanisms of rice pollen development remains unclear. RESULTS We identified a rice mutant oslap6 with complete male sterile phenotype caused by defects in pollen exine formation. By using the MutMap method, we found that a single nucleotide polymorphism (SNP) variation located in the second exon of OsLAP6/OsPKS1 was responsible for the mutant phenotype. OsLAP6/OsPKS1 is an orthologous gene of Arabidopsis PKSA/LAP6, which functions in sporopollenin metabolism. Several other loss-of-function mutants of OsLAP6/OsPKS1 generated by the CRISPR/Cas9 genomic editing tool also exhibited the same phenotype of male sterility. Our cellular analysis suggested that OsLAP6/OsPKS1 might regulate pollen exine formation by affecting bacula elongation. Expression examination indicated that OsLAP6/OsPKS1 is specifically expressed in tapetum, and its product is localized to the endoplasmic reticulum (ER). Protein sequence analysis indicated that OsLAP6/OsPKS1 is conserved in land plants. CONCLUSIONS OsLAP6/OsPKS1 is a critical molecular switch for rice male fertility by participating in a conserved sporopollenin precursor biosynthetic pathway in land plants. Manipulation of OsLAP6/OsPKS1 has potential for application in hybrid rice breeding.
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Affiliation(s)
- Ting Zou
- State Key Laboratory of Hybrid Rice, Rice Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
- Chongqing Key Laboratory of Economic Plant Biotechnology, Collaborative Innovation Center of Special Plant Industry in Chongqing, Institute of Special Plants, Chongqing University of Arts and Sciences, Yongchuan, 402160, China
| | - Qiao Xiao
- State Key Laboratory of Hybrid Rice, Rice Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Wenjie Li
- State Key Laboratory of Hybrid Rice, Rice Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Tao Luo
- State Key Laboratory of Hybrid Rice, Rice Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Guoqiang Yuan
- State Key Laboratory of Hybrid Rice, Rice Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Zhiyuan He
- State Key Laboratory of Hybrid Rice, Rice Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Mingxing Liu
- State Key Laboratory of Hybrid Rice, Rice Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Qiao Li
- State Key Laboratory of Hybrid Rice, Rice Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
- Chongqing Key Laboratory of Economic Plant Biotechnology, Collaborative Innovation Center of Special Plant Industry in Chongqing, Institute of Special Plants, Chongqing University of Arts and Sciences, Yongchuan, 402160, China
| | - Peizhou Xu
- State Key Laboratory of Hybrid Rice, Rice Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Jun Zhu
- State Key Laboratory of Hybrid Rice, Rice Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
- State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Changsha, 410125, China
| | - Yueyang Liang
- State Key Laboratory of Hybrid Rice, Rice Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Qiming Deng
- State Key Laboratory of Hybrid Rice, Rice Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Shiquan Wang
- State Key Laboratory of Hybrid Rice, Rice Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Aiping Zheng
- State Key Laboratory of Hybrid Rice, Rice Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Lingxia Wang
- State Key Laboratory of Hybrid Rice, Rice Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Ping Li
- State Key Laboratory of Hybrid Rice, Rice Research Institute, Sichuan Agricultural University, Chengdu, 611130, China.
- State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Changsha, 410125, China.
| | - Shuangcheng Li
- State Key Laboratory of Hybrid Rice, Rice Research Institute, Sichuan Agricultural University, Chengdu, 611130, China.
- State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Changsha, 410125, China.
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169
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Lin H, Yu J, Pearce SP, Zhang D, Wilson ZA. RiceAntherNet: a gene co-expression network for identifying anther and pollen development genes. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2017; 92:1076-1091. [PMID: 29031031 DOI: 10.1111/tpj.13744] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Revised: 09/29/2017] [Accepted: 10/02/2017] [Indexed: 06/07/2023]
Abstract
In plants, normal anther and pollen development involves many important biological events and complex molecular regulatory coordination. Understanding gene regulatory relationships during male reproductive development is essential for fundamental biology and crop breeding. In this work, we developed a rice gene co-expression network for anther development (RiceAntherNet) that allows prediction of gene regulatory relationships during pollen development. RiceAntherNet was generated from 57 rice anther tissue microarrays across all developmental stages. The microarray datasets from nine rice male sterile mutants, including msp1-4, ostdl1a, gamyb-2, tip2, udt1-1, tdr, eat1-1, ptc1 and mads3-4, were used to explore and test the network. Among the changed genes, three clades showing differential expression patterns were constructed to identify genes associated with pollen formation. Many of these have known roles in pollen development, for example, seven genes in Clade 1 (OsABCG15, OsLAP5, OsLAP6, DPW, CYP703A3, OsNP1 and OsCP1) are involved in rice pollen wall formation. Furthermore, Clade 1 contained 12 genes whose predicted orthologs in Arabidopsis have been reported as key during pollen development and may play similar roles in rice. Genes in Clade 2 are expressed earlier than Clade 1 (anther stages 2-9), while genes in Clade 3 are expressed later (stages 10-12). RiceAntherNet serves as a valuable tool for identifying novel genes during plant anther and pollen development. A website is provided (https://www.cpib.ac.uk/anther/riceindex.html) to present the expression profiles for gene characterization. This will assist in determining the key relationships between genes, thus enabling characterization of critical genes associated with anther and pollen regulatory networks.
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Affiliation(s)
- Hong Lin
- School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
- Division of Plant & Crop Sciences, School of Biosciences, University of Nottingham, Loughborough, UK
| | - Jing Yu
- School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - Simon P Pearce
- School of Mathematics, University of Manchester, Manchester, UK
- Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - Dabing Zhang
- School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - Zoe A Wilson
- Division of Plant & Crop Sciences, School of Biosciences, University of Nottingham, Loughborough, UK
- Centre for Plant Integrative Biology, School of Biosciences, University of Nottingham, Nottingham, UK
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170
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Two rice receptor-like kinases maintain male fertility under changing temperatures. Proc Natl Acad Sci U S A 2017; 114:12327-12332. [PMID: 29087306 DOI: 10.1073/pnas.1705189114] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Plants employ dynamic molecular networks to control development in response to environmental changes, yet the underlying mechanisms are largely unknown. Here we report the identification of two rice leucine-rich repeat receptor-like kinases, Thermo-Sensitive Genic Male Sterile 10 (TMS10) and its close homolog TMS10-Like (TMS10L), which redundantly function in the maintenance of the tapetal cell layer and microspore/pollen viability under normal temperature conditions with TMS10 playing an essential role in higher temperatures (namely, 28 °C). tms10 displays male sterility under high temperatures but male fertility under low temperatures, and the tms10 tms10l double mutant shows complete male sterility under both high and low temperatures. Biochemical and genetic assays indicate that the kinase activity conferred by the intracellular domain of TMS10 is essential for tapetal degeneration and male fertility under high temperatures. Furthermore, indica or japonica rice varieties that contain mutations in TMS10, created by genetic crosses or genome editing, also exhibit thermo-sensitive genic male sterility. These findings demonstrate that TMS10 and TMS10L act as a key switch in postmeiotic tapetal development and pollen development by buffering environmental temperature changes, providing insights into the molecular mechanisms by which plants develop phenotypic plasticity via genotype-environment temperature interaction. TMS10 may be used as a genetic resource for the development of hybrid seed production systems in crops.
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171
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Analysis of the meiotic transcriptome reveals the genes related to the regulation of pollen abortion in cytoplasmic male-sterile pepper (Capsicum annuum L.). Gene 2017; 641:8-17. [PMID: 29031775 DOI: 10.1016/j.gene.2017.10.022] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Revised: 10/04/2017] [Accepted: 10/10/2017] [Indexed: 01/23/2023]
Abstract
CMS, which refers to the inability to generate functional pollen grains while still producing a normal gynoecium, has been widely used for pepper hybrid seed production. Pepper line 8214A is an excellent CMS line exhibiting 100% male sterility and superior economic characteristics. A TUNEL assay revealed the nuclear DNA is damaged in 8214A PMCs during meiosis. TEM images indicated that the 8214A PMCs exhibited asynchronous meiosis after prophase I, and some PMCs degraded prematurely with morphological features typical of PCD. Additionally, at the end of meiosis, the 8214A PMCs formed abnormal non-tetrahedral tetrads that degraded in situ. To identify the genes involved in the pollen abortion of line 8214A, the transcriptional profiles of the 8214A and the 8214B anthers (i.e., from the fertile maintainer line) during meiosis were analyzed using an RNA-seq approach. A total of 1355 genes were determined to be differentially expressed, including 424 and 931 up- and down- regulated genes, respectively, in the 8214A anthers during meiosis relative to the expression levels in the 8214B. The expression levels of ubiquitin ligase and cell cycle-related genes were apparently down-regulated, while the expression of methyltransferase genes was up-regulated in the 8214A anthers during meiosis, which likely contributed to the PCD of these PMCs during meiosis. Thus, our results may be useful for revealing the molecular mechanism regulating the pollen abortion of CMS pepper.
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172
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Liu YJ, Liu X, Chen H, Zheng P, Wang W, Wang L, Zhang J, Tu J. A Plastid-Localized Pentatricopeptide Repeat Protein is Required for Both Pollen Development and Plant Growth in Rice. Sci Rep 2017; 7:11484. [PMID: 28904339 PMCID: PMC5597598 DOI: 10.1038/s41598-017-10727-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Accepted: 08/14/2017] [Indexed: 11/18/2022] Open
Abstract
Several mitochondrial-targeted pentatricopeptide repeat (PPR) proteins involved in pollen development have been reported to be fertility restorer (Rf) proteins. However, the roles of plastid-localized PPR proteins in plant male reproduction are poorly defined. Here, we described a plastid-localized PPR-SMR protein, OsPPR676, which is required for plant growth and pollen development in rice. In this study, OsPPR676 was confirmed to be an interacted protein with Osj10gBTF3, β-subunit of nascent polypeptide-associated complex (β-NAC), by bimolecular fluorescence complementation assays, indicating that both proteins are probably involved in the same regulatory pathway of pollen development. Compared with other chloroplast-rich tissues, OsPPR676 was only weakly expressed in anther, but in the Mei and YM stages of pollen development, its expression was relatively strong in the tapetum. Disruption of OsPPR676 resulted in growth retardation of plants and partial sterility of pollens. Phenotypic analysis of different osppr676 mutant lines implied that the SMR domain was not essential for the function of OsPPR676. We further demonstrated that OsPPR676 is essential for production of plastid atpB subunit, and then plays crucial roles in biosynthesis of fatty acids, carbohydrates, and other organic matters via affecting activity of ATP synthase.
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Affiliation(s)
- Yu-Jun Liu
- Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, P. R. China.,State Key Lab of Agrobiotechnology, School of Life Science, The Chinese University of Hong Kong, N.T., Hong Kong, P. R. China
| | - Xuejiao Liu
- Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, P. R. China
| | - Hao Chen
- Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, P. R. China
| | - Peng Zheng
- Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, P. R. China
| | - Wenyi Wang
- Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, P. R. China
| | - Liangchao Wang
- Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, P. R. China
| | - Jianhua Zhang
- State Key Lab of Agrobiotechnology, School of Life Science, The Chinese University of Hong Kong, N.T., Hong Kong, P. R. China.
| | - Jumin Tu
- Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, P. R. China.
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173
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Zhu X, Yu J, Shi J, Tohge T, Fernie AR, Meir S, Aharoni A, Xu D, Zhang D, Liang W. The polyketide synthase OsPKS2 is essential for pollen exine and Ubisch body patterning in rice. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2017; 59:612-628. [PMID: 28783252 DOI: 10.1111/jipb.12574] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Accepted: 08/03/2017] [Indexed: 05/07/2023]
Abstract
Lipid and phenolic metabolism are important for pollen exine formation. In Arabidopsis, polyketide synthases (PKSs) are essential for both sporopollenin biosynthesis and exine formation. Here, we characterized the role of a polyketide synthase (OsPKS2) in male reproduction of rice (Oryza sativa). Recombinant OsPKS2 catalyzed the condensation of fatty acyl-CoA with malonyl-CoA to generate triketide and tetraketide α-pyrones, the main components of pollen exine. Indeed, the ospks2 mutant had defective exine patterning and was male sterile. However, the mutant showed no significant reduction in sporopollenin accumulation. Compared with the WT (wild type), ospks2 displayed unconfined and amorphous tectum and nexine layers in the exine, and less organized Ubisch bodies. Like the pksb/lap5 mutant of the Arabidopsis ortholog, ospks2 showed broad alterations in the profiles of anther-related phenolic compounds. However, unlike pksb/lap5, in which most detected phenolics were substantially decreased, ospks2 accumulated higher levels of phenolics. Based on these results and our observation that OsPKS2 is unable to fully restore the exine defects in the pksb/lap5, we propose that PKS proteins have functionally diversified during evolution. Collectively, our results suggest that PKSs represent a conserved and diversified biochemical pathway for anther and pollen development in higher plants.
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Affiliation(s)
- Xiaolei Zhu
- Joint International Research Laboratory of Metabolic & Developmental Sciences, Shanghai Jiao Tong University-University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jing Yu
- Joint International Research Laboratory of Metabolic & Developmental Sciences, Shanghai Jiao Tong University-University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jianxin Shi
- Joint International Research Laboratory of Metabolic & Developmental Sciences, Shanghai Jiao Tong University-University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Takayuki Tohge
- Central Metabolism Group, Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
| | - Alisdair R Fernie
- Central Metabolism Group, Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
| | - Sagit Meir
- Department of Plant Sciences, Weizmann Institute of Science, PO Box 26, Rehovot 76100, Israel
| | - Asaph Aharoni
- Department of Plant Sciences, Weizmann Institute of Science, PO Box 26, Rehovot 76100, Israel
| | - Dawei Xu
- Joint International Research Laboratory of Metabolic & Developmental Sciences, Shanghai Jiao Tong University-University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Dabing Zhang
- Joint International Research Laboratory of Metabolic & Developmental Sciences, Shanghai Jiao Tong University-University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
- School of Agriculture, Food and Wine, University of Adelaide, Waite Campus, SA 5005, Australia
| | - Wanqi Liang
- Joint International Research Laboratory of Metabolic & Developmental Sciences, Shanghai Jiao Tong University-University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
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174
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Zou T, Li S, Liu M, Wang T, Xiao Q, Chen D, Li Q, Liang Y, Zhu J, Liang Y, Deng Q, Wang S, Zheng A, Wang L, Li P. An atypical strictosidine synthase, OsSTRL2, plays key roles in anther development and pollen wall formation in rice. Sci Rep 2017; 7:6863. [PMID: 28761138 PMCID: PMC5537339 DOI: 10.1038/s41598-017-07064-4] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Accepted: 06/21/2017] [Indexed: 11/25/2022] Open
Abstract
Strictosidine synthase (STR) plays an important role in the biosynthesis of terpenoid indole alkaloids (TIAs) and is expressed in a range of active meristematic tissues of higher plants. STR proteins are involved in different physiological and biochemical pathways. However, the function of STR proteins in rice development remains poorly understood. In this study, we identified 21 possible STR-like (OsSTRL) family members in rice genome and found that only one gene, OsSTRL2, exhibited a pre-emergency specific florescence expression pattern. Tissue-specific expression profile analysis, β-glucuronidase histochemical (GUS) staining and RNA in situ hybridization confirmed that OsSTRL2 was highly expressed in tapetal cells and microspores. Comparative protein sequence analysis indicated that OsSTRL2 lacked the key catalytic residue found in a typical STR (STR1), although it possessed conserved β-propellers and α-helices formed the basic structure of STR1. OsSTRL2 knockout mutant resulted to male sterility because of the defects in anther development and pollen wall formation. Subcellular localization of OsSTRL2-YFP revealed that the OsSTRL2 protein was primarily localized in the endoplasmic reticulum (ER). Therefore, OsSTRL2 is an atypical strictosidine synthase that plays crucial roles in regulating anther development and pollen wall formation in rice.
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Affiliation(s)
- Ting Zou
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Shuangcheng Li
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China.
- Rice Research Institute, Sichuan Agricultural University, Chengdu, 611130, China.
- Key Laboratory of Crop Genetic Resources and Improvement, Sichuan Agricultural University, Ministry of Education, Ya'an, 625014, China.
| | - Mingxing Liu
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Tao Wang
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Qiao Xiao
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Dan Chen
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Qiao Li
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Yanling Liang
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Jun Zhu
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
- Key Laboratory of Crop Genetic Resources and Improvement, Sichuan Agricultural University, Ministry of Education, Ya'an, 625014, China
| | - Yueyang Liang
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Qiming Deng
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
- Key Laboratory of Crop Genetic Resources and Improvement, Sichuan Agricultural University, Ministry of Education, Ya'an, 625014, China
| | - Shiquan Wang
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
- Key Laboratory of Crop Genetic Resources and Improvement, Sichuan Agricultural University, Ministry of Education, Ya'an, 625014, China
| | - Aiping Zheng
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Lingxia Wang
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
- Key Laboratory of Crop Genetic Resources and Improvement, Sichuan Agricultural University, Ministry of Education, Ya'an, 625014, China
| | - Ping Li
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China.
- Rice Research Institute, Sichuan Agricultural University, Chengdu, 611130, China.
- Key Laboratory of Crop Genetic Resources and Improvement, Sichuan Agricultural University, Ministry of Education, Ya'an, 625014, China.
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175
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Xu Y, Liu S, Liu Y, Ling S, Chen C, Yao J. HOTHEAD-Like HTH1 is Involved in Anther Cutin Biosynthesis and is Required for Pollen Fertility in Rice. PLANT & CELL PHYSIOLOGY 2017; 58:1238-1248. [PMID: 28838125 DOI: 10.1093/pcp/pcx063] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Accepted: 04/22/2017] [Indexed: 05/26/2023]
Abstract
The cuticle covering the outer surface of anthers is essential for male reproductive development in plants. However, the mechanism underlying the synthesis of these lipidic polymers remains unclear. HOTHEAD (HTH) in Arabidopsis thaliana is a presumptive glucose-methanol-choline (GMC) oxidoreductase involved in the biosynthesis of long-chain α-,ω-dicarboxylic fatty acids. In this study, we characterized the function of an anther-specific gene HTH1 in rice. HTH1 contains a conserved GMC oxidoreductase-like domain, and the sequence of HTH1 was highly similar to that of HTH in A. thaliana. Quantitative real-time PCR (qRT-PCR) and in situ hybridization analyses showed that HTH1 was highly expressed in epidermal cells of anthers. Rice plants with HTH1 suppression through CRISPR (clustered regularly interspaced short palindromic repeats) and RNA interference (RNAi) displayed defective anther wall and aborted pollen. Disorganized cuticle layers in anthers and shriveled pollen grains were observed in HTH1-RNAi lines. The total amounts of long-chain fatty acids and cutin monomers in anthers of HTH1-RNAi lines were significantly reduced compared with the wild type. Our results suggested that HTH1 is involved in cutin biosynthesis and is required for anther development and pollen fertility in rice.
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Affiliation(s)
- Ya Xu
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Shasha Liu
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Yaqin Liu
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Sheng Ling
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Caisheng Chen
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Jialing Yao
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
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176
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Yang X, Liang W, Chen M, Zhang D, Zhao X, Shi J. Rice fatty acyl-CoA synthetase OsACOS12 is required for tapetum programmed cell death and male fertility. PLANTA 2017; 246:105-122. [PMID: 28382520 DOI: 10.1007/s00425-017-2691-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Accepted: 04/02/2017] [Indexed: 05/18/2023]
Abstract
Loss of function mutation of rice OsACOS12 impairs lipid metabolism-mediated anther cuticle and pollen wall formation, and interferes with tapetum programmed cell death, leading to male sterility. Acyl-CoA Synthetase (ACOS) is one of the enzymes activating fatty acids for various metabolic functions in plants. Here, we show that OsACOS12, an orthologue of Arabidopsis ACOS5 in rice, is crucial for rice fertility. Similar to acos5, osaocs12 mutant had no mature pollen. But unlike acos5, osaocs12 produced defective anthers lacking cutin and Ubisch bodies on the epidermal and inner surfaces, respectively, and delayed programmed cell death (PCD)-induced tapetum degradation. Those phenotypic changes were evident at stage 10, during which OsACOS12 had its maximum expression in tapetal cells and microspores. Chemical analysis revealed that the levels of anther cuticular lipid components (wax and cutin monomers) were significantly reduced in osaocs12, while the expression levels of three known lipid biosynthetic genes were unchanged. Recombinant OsACOS12 enzyme was shown to catalyze the conversion of C18:1 fatty acid to C18:1 CoA in vitro. Phylogenetic analysis indicated that OsACOS12 is an ancient and conserved enzyme associated with the plant's colonization to earth. Collectively, our study suggests that OsACOS12 is an ancient enzyme participating in a conserved metabolic pathway for diversified biochemical functions to secure male reproduction in plants.
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Affiliation(s)
- Xijia Yang
- Joint International Research Laboratory of Metabolic and Developmental Sciences, Shanghai Jiao Tong University-University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Wanqi Liang
- Joint International Research Laboratory of Metabolic and Developmental Sciences, Shanghai Jiao Tong University-University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Minjiao Chen
- Joint International Research Laboratory of Metabolic and Developmental Sciences, Shanghai Jiao Tong University-University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Dabing Zhang
- Joint International Research Laboratory of Metabolic and Developmental Sciences, Shanghai Jiao Tong University-University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China
- Plant Genomics Center, School of Agriculture, Food and Wine, University of Adelaide, Waite Campus, Urrbrae, SA, 5064, Australia
- Key Laboratory of Crop Marker-Assisted Breeding of Huaian Municipality, Jiangsu Collaborative Innovation Center of Regional Modern Agriculture and Environmental Protection, Huaian, 223300, China
| | - Xiangxiang Zhao
- Key Laboratory of Crop Marker-Assisted Breeding of Huaian Municipality, Jiangsu Collaborative Innovation Center of Regional Modern Agriculture and Environmental Protection, Huaian, 223300, China
| | - Jianxin Shi
- Joint International Research Laboratory of Metabolic and Developmental Sciences, Shanghai Jiao Tong University-University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China.
- Key Laboratory of Crop Marker-Assisted Breeding of Huaian Municipality, Jiangsu Collaborative Innovation Center of Regional Modern Agriculture and Environmental Protection, Huaian, 223300, China.
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177
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Liu Z, Lin S, Shi J, Yu J, Zhu L, Yang X, Zhang D, Liang W. Rice No Pollen 1 (NP1) is required for anther cuticle formation and pollen exine patterning. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2017; 91:263-277. [PMID: 28378445 DOI: 10.1111/tpj.13561] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Revised: 03/20/2017] [Accepted: 03/24/2017] [Indexed: 05/28/2023]
Abstract
Angiosperm male reproductive organs (anthers and pollen grains) have complex and interesting morphological features, but mechanisms that underlie their patterning are poorly understood. Here we report the isolation and characterization of a male sterile mutant of No Pollen 1 (NP1) in rice (Oryza sativa). The np1-4 mutant exhibited smaller anthers with a smooth cuticle surface, abnormal Ubisch bodies, and aborted pollen grains covered with irregular exine. Wild-type exine has two continuous layers; but np1-4 exine showed a discontinuous structure with large granules of varying size. Chemical analysis revealed reduction in most of the cutin monomers in np1-4 anthers, and less cuticular wax. Map-based cloning suggested that NP1 encodes a putative glucose-methanol-choline oxidoreductase; and expression analyses found NP1 preferentially expressed in the tapetal layer from stage 8 to stage 10 of anther development. Additionally, the expression of several genes involved in biosynthesis and in the transport of lipid monomers of sporopollenin and cutin was decreased in np1-4 mutant anthers. Taken together, these observations suggest that NP1 is required for anther cuticle formation, and for patterning of Ubisch bodies and the exine. We propose that products of NP1 are likely important metabolites in the development of Ubisch bodies and pollen exine, necessary for polymerization, assembly, or both.
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Affiliation(s)
- Ze Liu
- Joint International Research Laboratory of Metabolic & Developmental Sciences, State Key Laboratory of Hybrid Rice, Shanghai Jiao Tong University-University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Sen Lin
- Joint International Research Laboratory of Metabolic & Developmental Sciences, State Key Laboratory of Hybrid Rice, Shanghai Jiao Tong University-University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Jianxin Shi
- Joint International Research Laboratory of Metabolic & Developmental Sciences, State Key Laboratory of Hybrid Rice, Shanghai Jiao Tong University-University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Jing Yu
- Joint International Research Laboratory of Metabolic & Developmental Sciences, State Key Laboratory of Hybrid Rice, Shanghai Jiao Tong University-University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Lu Zhu
- Joint International Research Laboratory of Metabolic & Developmental Sciences, State Key Laboratory of Hybrid Rice, Shanghai Jiao Tong University-University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Xiujuan Yang
- School of Agriculture, Food and Wine, University of Adelaide, Waite Campus, Urrbrae, South Australia, 5064, Australia
| | - Dabing Zhang
- Joint International Research Laboratory of Metabolic & Developmental Sciences, State Key Laboratory of Hybrid Rice, Shanghai Jiao Tong University-University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China
- School of Agriculture, Food and Wine, University of Adelaide, Waite Campus, Urrbrae, South Australia, 5064, Australia
| | - Wanqi Liang
- Joint International Research Laboratory of Metabolic & Developmental Sciences, State Key Laboratory of Hybrid Rice, Shanghai Jiao Tong University-University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China
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178
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Hao X, Chen C, Chen G, Cao B, Lei J. Cloning and expression analysis of a new anther-specific gene CaMF4 in Capsicum annuum. J Genet 2017; 96:25-31. [PMID: 28360386 DOI: 10.1007/s12041-016-0735-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Our previous study on the genic male sterile-fertile line 114AB of Capsicum annuum indicated a diversity of differentially expressed cDNA fragments in fertile and sterile lines. In this study, a transcript-derived fragment (TDF), male fertile 4 (CaMF4) was chosen for further investigation to observe that this specific fragment accumulates in the flower buds of the fertile line. The full genomic DNA sequence of CaMF4 was 894 bp in length, containing two exons and one intron, and the complete coding sequence encoded a putative 11.53 kDa protein of 109 amino acids. The derived protein of CaMF4 shared similarity with the members of PGPS/D3 protein family. The expression of CaMF4 was detected in both the flower buds at stage 8 and open flowers of the male fertile line. In contrast to this observation, expression of CaMF4 was not detected in any organs of the male sterile line. Further analysis revealed that CaMF4 was expressed particularly in anthers of the fertile line. Our results suggest that CaMF4 is an anther-specific gene and might be indispensable for anther or pollen development in C. annuum.
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Affiliation(s)
- Xuefeng Hao
- Department of Biology, Taiyuan Normal University, Taiyuan 030012, Shanxi Province, People's Republic of China.
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179
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Ranjan R, Khurana R, Malik N, Badoni S, Parida SK, Kapoor S, Tyagi AK. bHLH142 regulates various metabolic pathway-related genes to affect pollen development and anther dehiscence in rice. Sci Rep 2017; 7:43397. [PMID: 28262713 PMCID: PMC5338287 DOI: 10.1038/srep43397] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Accepted: 01/20/2017] [Indexed: 01/14/2023] Open
Abstract
Apposite development of anther and its dehiscence are important for the reproductive success of the flowering plants. Recently, bHLH142, a bHLH transcription factor encoding gene of rice has been found to show anther-specific expression and mutant analyses suggest its functions in regulating tapetum differentiation and degeneration during anther development. However, our study on protein level expression and gain-of-function phenotype revealed novel aspects of its regulation and function during anther development. Temporally dissimilar pattern of bHLH142 transcript and polypeptide accumulation suggested regulation of its expression beyond transcriptional level. Overexpression of bHLH142 in transgenic rice resulted in indehiscent anthers and aborted pollen grains. Defects in septum and stomium rupture caused anther indehiscence while pollen abortion phenotype attributed to abnormal degeneration of the tapetum. Furthermore, RNA-Seq-based transcriptome analysis of tetrad and mature pollen stage anthers of wild type and bHLH142OEplants suggested that it might regulate carbohydrate and lipid metabolism, cell wall modification, reactive oxygen species (ROS) homeostasis and cell death-related genes during rice anther development. Thus, bHLH142 is an anther-specific gene whose expression is regulated at transcriptional and post-transcriptional/translational levels. It plays a role in pollen maturation and anther dehiscence by regulating expression of various metabolic pathways-related genes.
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Affiliation(s)
- Rajeev Ranjan
- National Institute of Plant Genome Research (NIPGR), Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Reema Khurana
- Department of Plant Molecular Biology, University of Delhi South Campus, Benito Juarez Marg, New Delhi 110021, India
| | - Naveen Malik
- National Institute of Plant Genome Research (NIPGR), Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Saurabh Badoni
- National Institute of Plant Genome Research (NIPGR), Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Swarup K. Parida
- National Institute of Plant Genome Research (NIPGR), Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Sanjay Kapoor
- Department of Plant Molecular Biology, University of Delhi South Campus, Benito Juarez Marg, New Delhi 110021, India
| | - Akhilesh K. Tyagi
- National Institute of Plant Genome Research (NIPGR), Aruna Asaf Ali Marg, New Delhi 110067, India
- Department of Plant Molecular Biology, University of Delhi South Campus, Benito Juarez Marg, New Delhi 110021, India
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180
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Escamez S, Tuominen H. Contribution of cellular autolysis to tissular functions during plant development. CURRENT OPINION IN PLANT BIOLOGY 2017; 35:124-130. [PMID: 27936412 DOI: 10.1016/j.pbi.2016.11.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Revised: 11/23/2016] [Accepted: 11/25/2016] [Indexed: 05/26/2023]
Abstract
Plant development requires specific cells to be eliminated in a predictable and genetically regulated manner referred to as programmed cell death (PCD). However, the target cells do not merely die but they also undergo autolysis to degrade their cellular corpses. Recent progress in understanding developmental cell elimination suggests that distinct proteins execute PCD sensu stricto and autolysis. In addition, cell death alone and cell dismantlement can fulfill different functions. Hence, it appears biologically meaningful to distinguish between the modules of PCD and autolysis during plant development.
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Affiliation(s)
- Sacha Escamez
- Umeå Plant Science Centre, Department of Plant Physiology, Umeå University, SE-90187 Umeå, Sweden
| | - Hannele Tuominen
- Umeå Plant Science Centre, Department of Plant Physiology, Umeå University, SE-90187 Umeå, Sweden.
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181
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Yue L, Twell D, Kuang Y, Liao J, Zhou X. Transcriptome Analysis of Hamelia patens (Rubiaceae) Anthers Reveals Candidate Genes for Tapetum and Pollen Wall Development. FRONTIERS IN PLANT SCIENCE 2017; 7:1991. [PMID: 28119704 PMCID: PMC5220384 DOI: 10.3389/fpls.2016.01991] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Accepted: 12/15/2016] [Indexed: 06/06/2023]
Abstract
Studies of the anther transcriptome on non-model plants without a known genome are surprisingly scarce. RNA-Seq and digital gene expression (DGE) profiling provides a comprehensive approach to identify candidate genes contributing to developmental processes in non-model species. Here we built a transcriptome library of developing anthers of Hamelia patens and analyzed DGE profiles from each stage to identify genes that regulate tapetum and pollen development. In total 7,720 putative differentially expressed genes across four anther stages were identified. The number of putative stage-specific genes was: 776 at microspore mother cell stage, 807 at tetrad stage, 322 at uninucleate microspore stage, and the highest number (1,864) at bicellular pollen stage. GO enrichment analysis revealed 243 differentially expressed and 108 stage-specific genes that are potentially related to tapetum development, sporopollenin synthesis, and pollen wall. The number of expressed genes, their function and expression profiles were all significantly correlated with anther developmental processes. Overall comparisons of anther and pollen transcriptomes with those of rice and Arabidopsis together with the expression profiles of homologs of known anther-expressed genes, revealed conserved patterns and also divergence. The divergence may reflect taxon-specific differences in gene expression, the use RNA-seq as a more sensitive methodology, variation in tissue composition and sampling strategies. Given the lack of genomic sequence, this study succeeded in assigning putative identity to a significant proportion of anther-expressed genes and genes relevant to tapetum and pollen development in H. patens. The anther transcriptome revealed a molecular distinction between developmental stages, serving as a resource to unravel the functions of genes involved in anther development in H. patens and informing the analysis of other members of the Rubiaceae.
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Affiliation(s)
- Lin Yue
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of SciencesGuangzhou, China
- College of Life Sciences, University of Chinese Academy of SciencesBeijing, China
| | - David Twell
- Department of Genetics, University of LeicesterLeicester, UK
| | - Yanfeng Kuang
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of SciencesGuangzhou, China
| | - Jingping Liao
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of SciencesGuangzhou, China
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182
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Zhang P, Zhang Y, Sun L, Sinumporn S, Yang Z, Sun B, Xuan D, Li Z, Yu P, Wu W, Wang K, Cao L, Cheng S. The Rice AAA-ATPase OsFIGNL1 Is Essential for Male Meiosis. FRONTIERS IN PLANT SCIENCE 2017; 8:1639. [PMID: 29021797 PMCID: PMC5624289 DOI: 10.3389/fpls.2017.01639] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Accepted: 09/06/2017] [Indexed: 05/18/2023]
Abstract
Meiosis is crucial in reproduction of plants and ensuring genetic diversity. Although several genes involved in homologous recombination and DNA repair have been reported, their functions in rice (Oryza sativa) male meiosis remain poorly understood. Here, we isolated and characterized the rice OsFIGNL1 (OsFidgetin-like 1) gene, encoding a conserved AAA-ATPase, and explored its function and importance in male meiosis and pollen formation. The rice Osfignl1 mutant exhibited normal vegetative growth, but failed to produce seeds and displayed pollen abortion phenotype. Phenotypic comparisons between the wild-type and Osfignl1 mutant demonstrated that OsFIGNL1 is required for anther development, and that the recessive mutation of this gene causes male sterility in rice. Complementation and CRISPR/Cas9 experiments demonstrated that wild-type OsFIGNL1 is responsible for the male sterility phenotype. Subcellular localization showed that OsFIGNL1-green fluorescent protein was exclusively localized in the nucleus of rice protoplasts. Male meiosis in the Osfignl1 mutant exhibited abnormal chromosome behavior, including chromosome bridges and multivalent chromosomes at diakinesis, lagging chromosomes, and chromosome fragments during meiosis. Yeast two-hybrid assays demonstrated OsFIGNL1 could interact with RAD51A1, RAD51A2, DMC1A, DMC1B, and these physical interactions were further confirmed by BiFC assay. Taken together, our results suggest that OsFIGNL1 plays an important role in regulation of male meiosis and anther development.
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Affiliation(s)
- Peipei Zhang
- Key Laboratory for Zhejiang Super Rice Research and State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, China
| | - Yingxin Zhang
- Key Laboratory for Zhejiang Super Rice Research and State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
| | - Lianping Sun
- Key Laboratory for Zhejiang Super Rice Research and State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
| | - Sittipun Sinumporn
- Key Laboratory for Zhejiang Super Rice Research and State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
| | - Zhengfu Yang
- Key Laboratory for Zhejiang Super Rice Research and State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
| | - Bin Sun
- Key Laboratory for Zhejiang Super Rice Research and State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
| | - Dandan Xuan
- Key Laboratory for Zhejiang Super Rice Research and State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
| | - Zihe Li
- Key Laboratory for Zhejiang Super Rice Research and State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
| | - Ping Yu
- Key Laboratory for Zhejiang Super Rice Research and State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
| | - Weixun Wu
- Key Laboratory for Zhejiang Super Rice Research and State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
| | - Kejian Wang
- Key Laboratory for Zhejiang Super Rice Research and State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
| | - Liyong Cao
- Key Laboratory for Zhejiang Super Rice Research and State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
- *Correspondence: Liyong Cao, Shihua Cheng,
| | - Shihua Cheng
- Key Laboratory for Zhejiang Super Rice Research and State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
- *Correspondence: Liyong Cao, Shihua Cheng,
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183
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Men X, Shi J, Liang W, Zhang Q, Lian G, Quan S, Zhu L, Luo Z, Chen M, Zhang D. Glycerol-3-Phosphate Acyltransferase 3 (OsGPAT3) is required for anther development and male fertility in rice. JOURNAL OF EXPERIMENTAL BOTANY 2017; 68:513-526. [PMID: 28082511 PMCID: PMC6055571 DOI: 10.1093/jxb/erw445] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Accepted: 11/09/2016] [Indexed: 05/20/2023]
Abstract
Lipid molecules are key structural components of plant male reproductive organs, such as the anther and pollen. Although advances have been made in the understanding of acyl lipids in plant reproduction, the metabolic pathways of other lipid compounds, particularly glycerolipids, are not fully understood. Here we report that an endoplasmic reticulum-localized enzyme, Glycerol-3-Phosphate Acyltransferase 3 (OsGPAT3), plays an indispensable role in anther development and pollen formation in rice. OsGPAT3 is preferentially expressed in the tapetum and microspores of the anther. Compared with wild-type plants, the osgpat3 mutant displays smaller, pale yellow anthers with defective anther cuticle, degenerated pollen with defective exine, and abnormal tapetum development and degeneration. Anthers of the osgpat3 mutant have dramatic reductions of all aliphatic lipid contents. The defective cuticle and pollen phenotype coincide well with the down-regulation of sets of genes involved in lipid metabolism and regulation of anther development. Taking these findings together, this work reveals the indispensable role of a monocot-specific glycerol-3-phosphate acyltransferase in male reproduction in rice.
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Affiliation(s)
- Xiao Men
- State Key Laboratory of Hybrid Rice, Shanghai Jiao Tong University and University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - Jianxin Shi
- State Key Laboratory of Hybrid Rice, Shanghai Jiao Tong University and University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - Wanqi Liang
- State Key Laboratory of Hybrid Rice, Shanghai Jiao Tong University and University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - Qianfei Zhang
- State Key Laboratory of Hybrid Rice, Shanghai Jiao Tong University and University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - Gaibin Lian
- State Key Laboratory of Hybrid Rice, Shanghai Jiao Tong University and University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - Sheng Quan
- State Key Laboratory of Hybrid Rice, Shanghai Jiao Tong University and University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - Lu Zhu
- State Key Laboratory of Hybrid Rice, Shanghai Jiao Tong University and University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - Zhijing Luo
- State Key Laboratory of Hybrid Rice, Shanghai Jiao Tong University and University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - Mingjiao Chen
- State Key Laboratory of Hybrid Rice, Shanghai Jiao Tong University and University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - Dabing Zhang
- State Key Laboratory of Hybrid Rice, Shanghai Jiao Tong University and University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
- School of Agriculture, Food and Wine, University of Adelaide, Urrbrae, South Australia, Australia
- Correspondence:
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184
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Chang Z, Chen Z, Yan W, Xie G, Lu J, Wang N, Lu Q, Yao N, Yang G, Xia J, Tang X. An ABC transporter, OsABCG26, is required for anther cuticle and pollen exine formation and pollen-pistil interactions in rice. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2016; 253:21-30. [PMID: 27968990 DOI: 10.1016/j.plantsci.2016.09.006] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Revised: 09/15/2016] [Accepted: 09/16/2016] [Indexed: 05/21/2023]
Abstract
Wax, cutin and sporopollenin are essential components for the formation of the anther cuticle and the pollen exine, respectively. Their lipid precursors are synthesized by secretory tapetal cells and transported to the anther and microspore surface for deposition. However, the molecular mechanisms involved in the formation of the anther cuticle and pollen exine are poorly understood in rice. Here, we characterized a rice male sterile mutant osabcg26. Molecular cloning and sequence analysis revealed a point mutation in the gene encoding an ATP binding cassette transporter G26 (OsABCG26). OsABCG26 was specifically expressed in the anther and pistil. Cytological analysis revealed defects in tapetal cells, lipidic Ubisch bodies, pollen exine, and anther cuticle in the osabcg26 mutant. Expression of some key genes involved in lipid metabolism and transport, such as UDT1, WDA1, CYP704B2, OsABCG15, OsC4 and OsC6, was significantly altered in osabcg26 anther, possibly due to a disturbance in the homeostasis of anther lipid metabolism and transport. Additionally, wild-type pollen tubes showed a growth defect in osabcg26 pistils, leading to low seed setting in osabcg26 cross-pollinated with the wild-type pollen. These results indicated that OsABCG26 plays an important role in anther cuticle and pollen exine formation and pollen-pistil interactions in rice.
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Affiliation(s)
- Zhenyi Chang
- Shenzhen Institute of Molecular Crop Design, Shenzhen 518107, China; Guangdong Key Lab of Biotechnology for Plant Development, College of Life Sciences, South China Normal University, Guangzhou 510631, China
| | - Zhufeng Chen
- Shenzhen Institute of Molecular Crop Design, Shenzhen 518107, China
| | - Wei Yan
- School of Life Sciences, Capital Normal University, Beijing 100048, China
| | - Gang Xie
- Shenzhen Institute of Molecular Crop Design, Shenzhen 518107, China
| | - Jiawei Lu
- Shenzhen Institute of Molecular Crop Design, Shenzhen 518107, China
| | - Na Wang
- Shenzhen Institute of Molecular Crop Design, Shenzhen 518107, China
| | - Qiqing Lu
- Shenzhen Institute of Molecular Crop Design, Shenzhen 518107, China
| | - Nan Yao
- School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, China
| | - Guangzhe Yang
- State Key Laboratory of Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning 530005, China
| | - Jixing Xia
- State Key Laboratory of Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning 530005, China.
| | - Xiaoyan Tang
- Shenzhen Institute of Molecular Crop Design, Shenzhen 518107, China; Guangdong Key Lab of Biotechnology for Plant Development, College of Life Sciences, South China Normal University, Guangzhou 510631, China.
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185
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Sidorchuk YV, Kravets EA, Mursalimov SR, Plokhovskaya SG, Goryunova II, Yemets AI, Blume YB, Deineko EV. Efficiency of the induction of cytomixis in the microsporogenesis of dicotyledonous (N. tabacum L.) and monocotyledonous (H. distichum L.) plants by thermal stress. Russ J Dev Biol 2016. [DOI: 10.1134/s1062360416060072] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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186
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Construction of a male sterility system for hybrid rice breeding and seed production using a nuclear male sterility gene. Proc Natl Acad Sci U S A 2016; 113:14145-14150. [PMID: 27864513 DOI: 10.1073/pnas.1613792113] [Citation(s) in RCA: 143] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The breeding and large-scale adoption of hybrid seeds is an important achievement in agriculture. Rice hybrid seed production uses cytoplasmic male sterile lines or photoperiod/thermo-sensitive genic male sterile lines (PTGMS) as female parent. Cytoplasmic male sterile lines are propagated via cross-pollination by corresponding maintainer lines, whereas PTGMS lines are propagated via self-pollination under environmental conditions restoring male fertility. Despite huge successes, both systems have their intrinsic drawbacks. Here, we constructed a rice male sterility system using a nuclear gene named Oryza sativa No Pollen 1 (OsNP1). OsNP1 encodes a putative glucose-methanol-choline oxidoreductase regulating tapetum degeneration and pollen exine formation; it is specifically expressed in the tapetum and miscrospores. The osnp1 mutant plant displays normal vegetative growth but complete male sterility insensitive to environmental conditions. OsNP1 was coupled with an α-amylase gene to devitalize transgenic pollen and the red fluorescence protein (DsRed) gene to mark transgenic seed and transformed into the osnp1 mutant. Self-pollination of the transgenic plant carrying a single hemizygous transgene produced nontransgenic male sterile and transgenic fertile seeds in 1:1 ratio that can be sorted out based on the red fluorescence coded by DsRed Cross-pollination of the fertile transgenic plants to the nontransgenic male sterile plants propagated the male sterile seeds of high purity. The male sterile line was crossed with ∼1,200 individual rice germplasms available. Approximately 85% of the F1s outperformed their parents in per plant yield, and 10% out-yielded the best local cultivars, indicating that the technology is promising in hybrid rice breeding and production.
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187
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Fei Q, Yang L, Liang W, Zhang D, Meyers BC. Dynamic changes of small RNAs in rice spikelet development reveal specialized reproductive phasiRNA pathways. JOURNAL OF EXPERIMENTAL BOTANY 2016; 67:6037-6049. [PMID: 27702997 PMCID: PMC5100018 DOI: 10.1093/jxb/erw361] [Citation(s) in RCA: 84] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Dissection of the genetic pathways and mechanisms by which anther development occurs in grasses is crucial for both a basic understanding of plant development and for examining traits of agronomic importance such as male sterility. In rice, MULTIPLE SPOROCYTES1 (MSP1), a leucine-rich-repeat receptor kinase, plays an important role in anther development by limiting the number of sporocytes. OsTDL1a (a TPD1-like gene in rice) encodes a small protein that acts as a cofactor of MSP1 in the same regulatory pathway. In this study, we analyzed small RNA and mRNA changes in different stages of spikelets from wild-type rice, and from msp1 and ostdl1a mutants. Analysis of the small RNA data identified miRNAs demonstrating differential abundances. miR2275 was depleted in the two rice mutants; this miRNA is specifically enriched in anthers and functions to trigger the production of 24-nt phased secondary siRNAs (phasiRNAs) from PHAS loci. We observed that the 24-nt phasiRNAs as well as their precursor PHAS mRNAs were also depleted in the two mutants. An analysis of co-expression identified three Argonaute-encoding genes (OsAGO1d, OsAGO2b, and OsAGO18) that accumulate transcripts coordinately with phasiRNAs, suggesting a functional relationship. By mRNA in situ analysis, we demonstrated a strong correlation between the spatiotemporal pattern of these OsAGO transcripts and phasiRNA accumulations.
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Affiliation(s)
- Qili Fei
- Department of Plant & Soil Sciences and Delaware Biotechnology Institute, University of Delaware, Newark, DE 19711, USA
| | - Li Yang
- State Key Laboratory of Hybrid Rice, Joint International Research Laboratory of Metabolic and Developmental Sciences, Shanghai Jiao Tong University and University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Wanqi Liang
- State Key Laboratory of Hybrid Rice, Joint International Research Laboratory of Metabolic and Developmental Sciences, Shanghai Jiao Tong University and University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Dabing Zhang
- State Key Laboratory of Hybrid Rice, Joint International Research Laboratory of Metabolic and Developmental Sciences, Shanghai Jiao Tong University and University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
- School of Agriculture, Food and Wine, University of Adelaide, South Australia 5064, Australia
| | - Blake C Meyers
- Department of Plant & Soil Sciences and Delaware Biotechnology Institute, University of Delaware, Newark, DE 19711, USA
- Donald Danforth Plant Science Center, 975 North Warson Road, St. Louis, MO 63132, USA
- University of Missouri - Columbia, Division of Plant Sciences, 52 Agriculture Lab, Columbia, MO 65211, USA
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188
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Kravets EA, Sidorchuk YV, Horyunova II, Plohovskaya SH, Mursalimov SR, Deineko EV, Yemets AI, Blume YB. Intra- and intertissular cytomictic interactions in the microsporogenesis of mono- and dicotyledonous plants. CYTOL GENET+ 2016. [DOI: 10.3103/s0095452716050054] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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189
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Zhang K, Song Q, Wei Q, Wang C, Zhang L, Xu W, Su Z. Down-regulation of OsSPX1 caused semi-male sterility, resulting in reduction of grain yield in rice. PLANT BIOTECHNOLOGY JOURNAL 2016; 14:1661-72. [PMID: 26806409 PMCID: PMC5066639 DOI: 10.1111/pbi.12527] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Accepted: 12/06/2015] [Indexed: 05/03/2023]
Abstract
OsSPX1, a rice SPX domain gene, involved in the phosphate (Pi)-sensing mechanism plays an essential role in the Pi-signalling network through interaction with OsPHR2. In this study, we focused on the potential function of OsSPX1 during rice reproductive phase. Based on investigation of OsSPX1 antisense and sense transgenic rice lines in the paddy fields, we discovered that the down-regulation of OsSPX1 caused reduction of seed-setting rate and filled grain number. Through examination of anthers and pollens of the transgenic and wild-type plants by microscopy, we found that the antisense of OsSPX1 gene led to semi-male sterility, with lacking of mature pollen grains and phenotypes with a disordered surface of anthers and pollens. We further conducted rice whole-genome GeneChip analysis to elucidate the possible molecular mechanism underlying why the down-regulation of OsSPX1 caused deficiencies in anthers and pollens and lower seed-setting rate in rice. The down-regulation of OsSPX1 significantly affected expression of genes involved in carbohydrate metabolism and sugar transport, anther development, cell cycle, etc. These genes may be related to pollen fertility and male gametophyte development. Our study demonstrated that down-regulation of OsSPX1 disrupted rice normal anther and pollen development by affecting carbohydrate metabolism and sugar transport, leading to semi-male sterility, and ultimately resulted in low seed-setting rate and grain yield.
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Affiliation(s)
- Kang Zhang
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Qian Song
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Qiang Wei
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Chunchao Wang
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Liwei Zhang
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Wenying Xu
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Zhen Su
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing, China
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190
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Kim YJ, Jang MG, Zhu L, Silva J, Zhu X, Sukweenadhi J, Kwon WS, Yang DC, Zhang D. Cytological characterization of anther development in Panax ginseng Meyer. PROTOPLASMA 2016; 253:1111-1124. [PMID: 26277352 DOI: 10.1007/s00709-015-0869-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2015] [Accepted: 08/05/2015] [Indexed: 06/04/2023]
Abstract
Ginseng (Panax ginseng), a valued medicinal herb, is a slow-growing plant that flowers after 3 years of growth with the formation of a solitary terminal umbel inflorescence. However, little is known about cytological events during ginseng reproduction, such as the development of the male organ, the stamen. To better understand the mechanism controlling ginseng male reproductive development, here, we investigated the inflorescence and flower structure of ginseng. Moreover, we performed cytological analysis of anther morphogenesis and showed the common and specialized cytological events including the formation of four concentric cell layers surrounding male reproductive cells followed by subsequent cell differentiation and degeneration of tapetal cells, as well as the formation of mature pollen grains via meiosis and mitosis during ginseng anther development. Particularly, our transverse section and microscopic observations showed that the ginseng tapetal layer exhibits obvious nonsynchronous cell division evidenced by the observation of one or two tapetal layers frequently observed in one anther lobe, suggesting the unique control of cell division. To facilitate the future study on ginseng male reproduction, we grouped the anther development into 10 developmental stages according to the characterized cytological events.
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Affiliation(s)
- Yu-Jin Kim
- Department of Oriental Medicine Biotechnology and Graduate School of Biotechnology, College of Life Science, Kyung Hee University, Youngin, 446-701, South Korea.
- Joint International Research Laboratory of Metabolic and Developmental Sciences, Shanghai Jiao Tong University-University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 20040, China.
| | - Moon-Gi Jang
- Department of Oriental Medicine Biotechnology and Graduate School of Biotechnology, College of Life Science, Kyung Hee University, Youngin, 446-701, South Korea
| | - Lu Zhu
- Joint International Research Laboratory of Metabolic and Developmental Sciences, Shanghai Jiao Tong University-University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 20040, China
| | - Jeniffer Silva
- Department of Oriental Medicine Biotechnology and Graduate School of Biotechnology, College of Life Science, Kyung Hee University, Youngin, 446-701, South Korea
| | - Xiaolei Zhu
- Joint International Research Laboratory of Metabolic and Developmental Sciences, Shanghai Jiao Tong University-University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 20040, China
| | - Johan Sukweenadhi
- Department of Oriental Medicine Biotechnology and Graduate School of Biotechnology, College of Life Science, Kyung Hee University, Youngin, 446-701, South Korea
| | - Woo-Saeng Kwon
- Department of Oriental Medicine Biotechnology and Graduate School of Biotechnology, College of Life Science, Kyung Hee University, Youngin, 446-701, South Korea
| | - Deok-Chun Yang
- Department of Oriental Medicine Biotechnology and Graduate School of Biotechnology, College of Life Science, Kyung Hee University, Youngin, 446-701, South Korea.
| | - Dabing Zhang
- Joint International Research Laboratory of Metabolic and Developmental Sciences, Shanghai Jiao Tong University-University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 20040, China
- School of Agriculture, Food and Wine, University of Adelaide, Waite Campus, Urrbrae, South Australia, 5064, Australia
- Key Laboratory of Crop Marker-Assisted Breeding of Huaian Municipality, Jiangsu Collaborative Innovation Center of Regional Modern Agriculture and Environmental Protection, Huaian, 223300, China
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191
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Li Z, Zhang P, Lv J, Cheng Y, Cui J, Zhao H, Hu S. Global Dynamic Transcriptome Programming of Rapeseed (Brassica napus L.) Anther at Different Development Stages. PLoS One 2016; 11:e0154039. [PMID: 27139433 PMCID: PMC4854403 DOI: 10.1371/journal.pone.0154039] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Accepted: 04/07/2016] [Indexed: 11/24/2022] Open
Abstract
Rapeseed (Brassica napus L.) is an important oil crop worldwide and exhibits significant heterosis. Effective pollination control systems, which are closely linked to anther development, are a prerequisite for utilizing heterosis. The anther, which is the male organ in flowering plants, undergoes many metabolic processes during development. Although the gene expression patterns underlying pollen development are well studied in model plant Arabidopsis, the regulatory networks of genome-wide gene expression during rapeseed anther development is poorly understood, especially regarding metabolic regulations. In this study, we systematically analyzed metabolic processes occurring during anther development in rapeseed using ultrastructural observation and global transcriptome analysis. Anther ultrastructure exhibited that numerous cellular organelles abundant with metabolic materials, such as elaioplast, tapetosomes, plastids (containing starch deposits) etc. appeared, accompanied with anther structural alterations during anther development, suggesting many metabolic processes occurring. Global transcriptome analysis revealed dynamic changes in gene expression during anther development that corresponded to dynamic functional alterations between early and late anther developmental stages. The early stage anthers preferentially expressed genes involved in lipid metabolism that are related to pollen extine formation as well as elaioplast and tapetosome biosynthesis, whereas the late stage anthers expressed genes associated with carbohydrate metabolism to form pollen intine and to accumulate starch in mature pollen grains. Finally, a predictive gene regulatory module responsible for early pollen extine formation was generated. Taken together, this analysis provides a comprehensive understanding of dynamic gene expression programming of metabolic processes in the rapeseed anther, especially with respect to lipid and carbohydrate metabolism during pollen development.
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Affiliation(s)
- Zhanjie Li
- State Key Laboratory of Crop Stress Biology in Arid Areas, Northwest A&F University, Yangling, Shaanxi 712100, China.,College of Life Sciences, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Peipei Zhang
- State Key Laboratory of Crop Stress Biology in Arid Areas, Northwest A&F University, Yangling, Shaanxi 712100, China.,College of Life Sciences, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Jinyang Lv
- State Key Laboratory of Crop Stress Biology in Arid Areas, Northwest A&F University, Yangling, Shaanxi 712100, China.,College of Life Sciences, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yufeng Cheng
- State Key Laboratory of Crop Stress Biology in Arid Areas, Northwest A&F University, Yangling, Shaanxi 712100, China.,College of Life Sciences, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Jianmin Cui
- State Key Laboratory of Crop Stress Biology in Arid Areas, Northwest A&F University, Yangling, Shaanxi 712100, China.,College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Huixian Zhao
- State Key Laboratory of Crop Stress Biology in Arid Areas, Northwest A&F University, Yangling, Shaanxi 712100, China.,College of Life Sciences, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Shengwu Hu
- State Key Laboratory of Crop Stress Biology in Arid Areas, Northwest A&F University, Yangling, Shaanxi 712100, China.,College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China
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192
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Walbot V, Egger RL. Pre-Meiotic Anther Development: Cell Fate Specification and Differentiation. ANNUAL REVIEW OF PLANT BIOLOGY 2016; 67:365-95. [PMID: 26735065 DOI: 10.1146/annurev-arplant-043015-111804] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Research into anther ontogeny has been an active and developing field, transitioning from a strictly lineage-based view of cellular differentiation events to a more complex understanding of cell fate specification. Here we describe the modern interpretation of pre-meiotic anther development, from the earliest cell specifications within the anther lobes through SPL/NZZ-, MSP1-, and MEL1-dependent pathways as well as the initial setup of the abaxial and adaxial axes and outgrowth of the anther lobes. We then continue with a look at the known information regarding further differentiation of the somatic layers of the anther (the epidermis, endothecium, middle layer, and tapetum), with an emphasis on male-sterile mutants identified as defective in somatic cell specification. We also describe the differences in developmental stages among species and use this information to discuss molecular studies that have analyzed transcriptome, proteome, and small-RNA information in the anther.
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Affiliation(s)
- Virginia Walbot
- Department of Biology, Stanford University, Stanford, California 94305-5020; ,
| | - Rachel L Egger
- Department of Biology, Stanford University, Stanford, California 94305-5020; ,
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193
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Abstract
Pollen plays important roles in the life cycle of angiosperms plants. It acts as not only a biological protector of male sperms but also a communicator between the male and the female reproductive organs, facilitating pollination and fertilization. Pollen is produced within the anther, and covered by the specialized outer envelope, pollen wall. Although the morphology of pollen varies among different plant species, the pollen wall is mainly comprised of three layers: the pollen coat, the outer exine layer, and the inner intine layer. Except the intine layer, the other two layers are basically of lipidic nature. Particularly, the outer pollen wall layer, the exine, is a highly resistant biopolymer of phenylpropanoid and lipidic monomers covalently coupled by ether and ester linkages. The precise molecular mechanisms underlying pollen coat formation and exine patterning remain largely elusive. Herein, we summarize the current genetic, phenotypic and biochemical studies regarding to the pollen exine development and underlying molecular regulatory mechanisms mainly obtained from monocot rice (Oryza sativa) and dicot Arabidopsis thaliana, aiming to extend our understandings of plant male reproductive biology. Genes, enzymes/proteins and regulatory factors that appear to play conserved and diversified roles in lipid biosynthesis, transportation and modification during pollen exine formation, were highlighted.
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Affiliation(s)
- Dabing Zhang
- School of Life Sciences and Biotechnology, Shanghai Jiao Tong University-University of Adelaide Joint Centre for Agriculture and Health, Shanghai Jiao Tong University, Dongchuan Road 800, Shanghai, 200240, China.
| | - Jianxin Shi
- School of Life Sciences and Biotechnology, Shanghai Jiao Tong University-University of Adelaide Joint Centre for Agriculture and Health, Shanghai Jiao Tong University, Dongchuan Road 800, Shanghai, 200240, China
| | - Xijia Yang
- School of Life Sciences and Biotechnology, Shanghai Jiao Tong University-University of Adelaide Joint Centre for Agriculture and Health, Shanghai Jiao Tong University, Dongchuan Road 800, Shanghai, 200240, China
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194
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Li Q, Deng Z, Gong C, Wang T. The Rice Eukaryotic Translation Initiation Factor 3 Subunit f (OseIF3f) Is Involved in Microgametogenesis. FRONTIERS IN PLANT SCIENCE 2016; 7:532. [PMID: 27200010 PMCID: PMC4844609 DOI: 10.3389/fpls.2016.00532] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Accepted: 04/04/2016] [Indexed: 05/13/2023]
Abstract
Microgametogenesis is the post-meiotic pollen developmental phase when unicellular microspores develop into mature tricellular pollen. In rice, microgametogenesis can influence grain yields to a great degree because pollen abortion occurs more easily during microgametogenesis than during other stages of pollen development. However, our knowledge of the genes involved in microgametogenesis in rice remains limited. Due to the dependence of pollen development on the regulatory mechanisms of protein expression, we identified the encoding gene of the eukaryotic translation initiation factor 3, subunit f in Oryza sativa (OseIF3f). Immunoprecipitation combined with mass spectrometry confirmed that OseIF3f was a subunit of rice eIF3, which consisted of at least 12 subunits including eIF3a, eIF3b, eIF3c, eIF3d, eIF3e, eIF3f, eIF3g, eIF3h, eIF3i, eIF3k, eIF3l, and eIF3m. OseIF3f showed high mRNA levels in immature florets and is highly abundant in developing anthers. Subcellular localization analysis showed that OseIF3f was localized to the cytosol and the endoplasmic reticulum in rice root cells. We further analyzed the biological function of OseIF3f using the double-stranded RNA-mediated interference (RNAi) approach. The OseIF3f-RNAi lines grew normally at the vegetative stage but displayed a large reduction in seed production and pollen viability, which is associated with the down-regulation of OseIF3f. Further cytological observations of pollen development revealed that the OseIF3f-RNAi lines showed no obvious abnormalities at the male meiotic stage and the unicellular microspore stage. However, compared to the wild-type, OseIF3f-RNAi lines contained a higher percentage of arrested unicellular pollen at the bicellular stage and a higher percentage of arrested unicellular and bicellular pollen, and aborted pollen at the tricellular stage. These results indicate that OseIF3f plays a role in microgametogenesis.
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Affiliation(s)
- Qi Li
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of SciencesBeijing, China
- University of Chinese Academy of SciencesBeijing, China
| | - Zhuyun Deng
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of SciencesBeijing, China
| | - Chunyan Gong
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of SciencesBeijing, China
| | - Tai Wang
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of SciencesBeijing, China
- *Correspondence: Tai Wang,
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195
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Gómez JF, Talle B, Wilson ZA. Anther and pollen development: A conserved developmental pathway. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2015; 57:876-91. [PMID: 26310290 PMCID: PMC4794635 DOI: 10.1111/jipb.12425] [Citation(s) in RCA: 182] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Accepted: 08/23/2015] [Indexed: 05/19/2023]
Abstract
Pollen development is a critical step in plant development that is needed for successful breeding and seed formation. Manipulation of male fertility has proved a useful trait for hybrid breeding and increased crop yield. However, although there is a good understanding developing of the molecular mechanisms of anther and pollen anther development in model species, such as Arabidopsis and rice, little is known about the equivalent processes in important crops. Nevertheless the onset of increased genomic information and genetic tools is facilitating translation of information from the models to crops, such as barley and wheat; this will enable increased understanding and manipulation of these pathways for agricultural improvement.
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Affiliation(s)
- José Fernández Gómez
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire, LE12 5RD, UK
| | - Behzad Talle
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire, LE12 5RD, UK
| | - Zoe A Wilson
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire, LE12 5RD, UK
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196
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Shi J, Cui M, Yang L, Kim YJ, Zhang D. Genetic and Biochemical Mechanisms of Pollen Wall Development. TRENDS IN PLANT SCIENCE 2015; 20:741-753. [PMID: 26442683 DOI: 10.1016/j.tplants.2015.07.010] [Citation(s) in RCA: 236] [Impact Index Per Article: 26.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Revised: 07/26/2015] [Accepted: 07/31/2015] [Indexed: 05/18/2023]
Abstract
The pollen wall is a specialized extracellular cell wall matrix that surrounds male gametophytes and plays an essential role in plant reproduction. Uncovering the mechanisms that control the synthesis and polymerization of the precursors of pollen wall components has been a major research focus in plant biology. We review current knowledge on the genetic and biochemical mechanisms underlying pollen wall development in eudicot model Arabidopsis thaliana and monocot model rice (Oryza sativa), focusing on the genes involved in the biosynthesis, transport, and assembly of various precursors of pollen wall components. The conserved and divergent aspects of the genes involved as well as their regulation are addressed. Current challenges and future perspectives are also highlighted.
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Affiliation(s)
- Jianxin Shi
- Joint International Research Laboratory of Metabolic and Developmental Sciences, Shanghai Jiao Tong University (SJTU)-University of Adelaide Joint Centre for Agriculture and Health, State Key Laboratory of Hybrid Rice, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Meihua Cui
- Joint International Research Laboratory of Metabolic and Developmental Sciences, Shanghai Jiao Tong University (SJTU)-University of Adelaide Joint Centre for Agriculture and Health, State Key Laboratory of Hybrid Rice, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Li Yang
- Joint International Research Laboratory of Metabolic and Developmental Sciences, Shanghai Jiao Tong University (SJTU)-University of Adelaide Joint Centre for Agriculture and Health, State Key Laboratory of Hybrid Rice, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Yu-Jin Kim
- Joint International Research Laboratory of Metabolic and Developmental Sciences, Shanghai Jiao Tong University (SJTU)-University of Adelaide Joint Centre for Agriculture and Health, State Key Laboratory of Hybrid Rice, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China; Department of Oriental Medicinal Biotechnology and Graduate School of Biotechnology, College of Life Science, Kyung Hee University, Youngin, 446-701, South Korea
| | - Dabing Zhang
- Joint International Research Laboratory of Metabolic and Developmental Sciences, Shanghai Jiao Tong University (SJTU)-University of Adelaide Joint Centre for Agriculture and Health, State Key Laboratory of Hybrid Rice, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China; School of Agriculture, Food, and Wine, University of Adelaide, South Australia 5064, Australia.
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197
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Mirgorodskaya OE, Koteyeva NK, Volchanskaya AV, Miroslavov EA. Pollen development in Rhododendron in relation to winter dormancy and bloom time. PROTOPLASMA 2015; 252:1313-23. [PMID: 25643916 DOI: 10.1007/s00709-015-0764-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Accepted: 01/19/2015] [Indexed: 05/23/2023]
Abstract
Microsporogenesis and microgametogenesis of Rhododendron ledebourii (semi-deciduous), Rhododendron luteum (deciduous), and Rhododendron catawbiense (evergreen) were studied by light and electron microscopies in order to determine the stages of pollen development in relation to period of winter dormancy and bloom time throughout an annual growth cycle. Development of generative organs starts in June in R. ledebourii and in July in R. luteum and R. catawbiense and reaches completion about 11 months later. R. luteum and R. catawbiense microspores undergo meiosis at the end of the August and spend winter at the vacuolization stage. Mitosis with the formation of bicellular pollen grain occurs shortly before flowering at the beginning of June. R. ledebourii develops two types of flowers which differ in the timing of microgametogenesis. The first type is characterized by early microspore meiosis and mitosis leading to development of bicellular pollen grains by the end of August, and is prone to fall blooming during warm autumn temperatures. Microspores of the second flower type have a more prolonged vacuolization stage with mitosis and subsequent bicellular pollen grains occurring in November. By winter, flower buds in R. ledebourii are more advanced developmentally than in R. catawbiense and R. luteum, and bloom about 1 month earlier. The different strategies of pollen development identified both within and between these three Rhododendron species were recognized which are not associated with leaf drop during winter but appear to be related to the time of spring flowering and the frequency of autumn flowering.
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Affiliation(s)
- Olga E Mirgorodskaya
- V.L. Komarov Botanical Institute of Russian Academy of Science, 2, Prof. Popov St., 197376, St. Petersburg, Russia
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198
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Cao H, Li X, Wang Z, Ding M, Sun Y, Dong F, Chen F, Liu L, Doughty J, Li Y, Liu YX. Histone H2B Monoubiquitination Mediated by HISTONE MONOUBIQUITINATION1 and HISTONE MONOUBIQUITINATION2 Is Involved in Anther Development by Regulating Tapetum Degradation-Related Genes in Rice. PLANT PHYSIOLOGY 2015; 168:1389-405. [PMID: 26143250 PMCID: PMC4528728 DOI: 10.1104/pp.114.256578] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2014] [Accepted: 07/02/2015] [Indexed: 05/06/2023]
Abstract
Histone H2B monoubiquitination (H2Bub1) is an important regulatory mechanism in eukaryotic gene transcription and is essential for normal plant development. However, the function of H2Bub1 in reproductive development remains elusive. Here, we report rice (Oryza sativa) HISTONE MONOUBIQUITINATION1 (OsHUB1) and OsHUB2, the homologs of Arabidopsis (Arabidopsis thaliana) HUB1 and HUB2 proteins, which function as E3 ligases in H2Bub1, are involved in late anther development in rice. oshub mutants exhibit abnormal tapetum development and aborted pollen in postmeiotic anthers. Knockout of OsHUB1 or OsHUB2 results in the loss of H2Bub1 and a reduction in the levels of dimethylated lysine-4 on histone 3 (H3K4me2). Anther transcriptome analysis revealed that several key tapetum degradation-related genes including OsC4, rice Cysteine Protease1 (OsCP1), and Undeveloped Tapetum1 (UDT1) were down-regulated in the mutants. Further, chromatin immunoprecipitation assays demonstrate that H2Bub1 directly targets OsC4, OsCP1, and UDT1 genes, and enrichment of H2Bub1 and H3K4me2 in the targets is consistent to some degree. Our studies suggest that histone H2B monoubiquitination, mediated by OsHUB1 and OsHUB2, is an important epigenetic modification that in concert with H3K4me2, modulates transcriptional regulation of anther development in rice.
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Affiliation(s)
- Hong Cao
- Key Laboratory of Plant Molecular Physiology (H.C., X.L., Z.W., M.D., Y.S., F.D., F.C., Y.-X.L.) and Beijing Botanical Garden (L.L.), Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China;University of Chinese Academy of Sciences, Beijing 100049, China (X.L., M.D.);Department of Biology and Biochemistry, University of Bath, Bath BA2 7AY, United Kingdom (J.D.); andDepartment of Internal Medicine IV, University of Hospital Freiburg, 79106 Freiburg, Germany (Y.L.)
| | - Xiaoying Li
- Key Laboratory of Plant Molecular Physiology (H.C., X.L., Z.W., M.D., Y.S., F.D., F.C., Y.-X.L.) and Beijing Botanical Garden (L.L.), Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China;University of Chinese Academy of Sciences, Beijing 100049, China (X.L., M.D.);Department of Biology and Biochemistry, University of Bath, Bath BA2 7AY, United Kingdom (J.D.); andDepartment of Internal Medicine IV, University of Hospital Freiburg, 79106 Freiburg, Germany (Y.L.)
| | - Zhi Wang
- Key Laboratory of Plant Molecular Physiology (H.C., X.L., Z.W., M.D., Y.S., F.D., F.C., Y.-X.L.) and Beijing Botanical Garden (L.L.), Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China;University of Chinese Academy of Sciences, Beijing 100049, China (X.L., M.D.);Department of Biology and Biochemistry, University of Bath, Bath BA2 7AY, United Kingdom (J.D.); andDepartment of Internal Medicine IV, University of Hospital Freiburg, 79106 Freiburg, Germany (Y.L.)
| | - Meng Ding
- Key Laboratory of Plant Molecular Physiology (H.C., X.L., Z.W., M.D., Y.S., F.D., F.C., Y.-X.L.) and Beijing Botanical Garden (L.L.), Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China;University of Chinese Academy of Sciences, Beijing 100049, China (X.L., M.D.);Department of Biology and Biochemistry, University of Bath, Bath BA2 7AY, United Kingdom (J.D.); andDepartment of Internal Medicine IV, University of Hospital Freiburg, 79106 Freiburg, Germany (Y.L.)
| | - Yongzhen Sun
- Key Laboratory of Plant Molecular Physiology (H.C., X.L., Z.W., M.D., Y.S., F.D., F.C., Y.-X.L.) and Beijing Botanical Garden (L.L.), Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China;University of Chinese Academy of Sciences, Beijing 100049, China (X.L., M.D.);Department of Biology and Biochemistry, University of Bath, Bath BA2 7AY, United Kingdom (J.D.); andDepartment of Internal Medicine IV, University of Hospital Freiburg, 79106 Freiburg, Germany (Y.L.)
| | - Fengqin Dong
- Key Laboratory of Plant Molecular Physiology (H.C., X.L., Z.W., M.D., Y.S., F.D., F.C., Y.-X.L.) and Beijing Botanical Garden (L.L.), Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China;University of Chinese Academy of Sciences, Beijing 100049, China (X.L., M.D.);Department of Biology and Biochemistry, University of Bath, Bath BA2 7AY, United Kingdom (J.D.); andDepartment of Internal Medicine IV, University of Hospital Freiburg, 79106 Freiburg, Germany (Y.L.)
| | - Fengying Chen
- Key Laboratory of Plant Molecular Physiology (H.C., X.L., Z.W., M.D., Y.S., F.D., F.C., Y.-X.L.) and Beijing Botanical Garden (L.L.), Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China;University of Chinese Academy of Sciences, Beijing 100049, China (X.L., M.D.);Department of Biology and Biochemistry, University of Bath, Bath BA2 7AY, United Kingdom (J.D.); andDepartment of Internal Medicine IV, University of Hospital Freiburg, 79106 Freiburg, Germany (Y.L.)
| | - Li'an Liu
- Key Laboratory of Plant Molecular Physiology (H.C., X.L., Z.W., M.D., Y.S., F.D., F.C., Y.-X.L.) and Beijing Botanical Garden (L.L.), Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China;University of Chinese Academy of Sciences, Beijing 100049, China (X.L., M.D.);Department of Biology and Biochemistry, University of Bath, Bath BA2 7AY, United Kingdom (J.D.); andDepartment of Internal Medicine IV, University of Hospital Freiburg, 79106 Freiburg, Germany (Y.L.)
| | - James Doughty
- Key Laboratory of Plant Molecular Physiology (H.C., X.L., Z.W., M.D., Y.S., F.D., F.C., Y.-X.L.) and Beijing Botanical Garden (L.L.), Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China;University of Chinese Academy of Sciences, Beijing 100049, China (X.L., M.D.);Department of Biology and Biochemistry, University of Bath, Bath BA2 7AY, United Kingdom (J.D.); andDepartment of Internal Medicine IV, University of Hospital Freiburg, 79106 Freiburg, Germany (Y.L.)
| | - Yong Li
- Key Laboratory of Plant Molecular Physiology (H.C., X.L., Z.W., M.D., Y.S., F.D., F.C., Y.-X.L.) and Beijing Botanical Garden (L.L.), Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China;University of Chinese Academy of Sciences, Beijing 100049, China (X.L., M.D.);Department of Biology and Biochemistry, University of Bath, Bath BA2 7AY, United Kingdom (J.D.); andDepartment of Internal Medicine IV, University of Hospital Freiburg, 79106 Freiburg, Germany (Y.L.)
| | - Yong-Xiu Liu
- Key Laboratory of Plant Molecular Physiology (H.C., X.L., Z.W., M.D., Y.S., F.D., F.C., Y.-X.L.) and Beijing Botanical Garden (L.L.), Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China;University of Chinese Academy of Sciences, Beijing 100049, China (X.L., M.D.);Department of Biology and Biochemistry, University of Bath, Bath BA2 7AY, United Kingdom (J.D.); andDepartment of Internal Medicine IV, University of Hospital Freiburg, 79106 Freiburg, Germany (Y.L.)
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199
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Chen R, Shen LP, Wang DH, Wang FG, Zeng HY, Chen ZS, Peng YB, Lin YN, Tang X, Deng MH, Yao N, Luo JC, Xu ZH, Bai SN. A Gene Expression Profiling of Early Rice Stamen Development that Reveals Inhibition of Photosynthetic Genes by OsMADS58. MOLECULAR PLANT 2015; 8:1069-89. [PMID: 25684654 DOI: 10.1016/j.molp.2015.02.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2014] [Revised: 01/28/2015] [Accepted: 02/03/2015] [Indexed: 05/19/2023]
Abstract
Stamen is a unique plant organ wherein germ cells or microsporocytes that commit to meiosis are initiated from somatic cells during its early developmental process. While genes determining stamen identity are known according to the ABC model of floral development, little information is available on how these genes affect germ cell initiation. By using the Affymetrix GeneChip Rice Genome Array to assess 51 279 transcripts, we established a dynamic gene expression profile (GEP) of the early developmental process of rice (Oryza sativa) stamen. Systematic analysis of the GEP data revealed novel expression patterns of some developmentally important genes including meiosis-, tapetum-, and phytohormone-related genes. Following the finding that a substantial amount of nuclear genes encoding photosynthetic proteins are expressed at the low levels in early rice stamen, through the ChIP-seq analysis we found that a C-class MADS box protein, OsMADS58, binds many nuclear-encoded genes participated in photosystem and light reactions and the expression levels of most of them are increased when expression of OsMADS58 is downregulated in the osmads58 mutant. Furthermore, more pro-chloroplasts are observed and increased signals of reactive oxygen species are detected in the osmads58 mutant anthers. These findings implicate a novel link between stamen identity determination and hypoxia status establishment.
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Affiliation(s)
- Rui Chen
- State Key Laboratory of Protein and Plant Gene Research, College of Life Sciences, Peking University, Beijing 100871, China
| | - Li-Ping Shen
- State Key Laboratory of Protein and Plant Gene Research, College of Life Sciences, Peking University, Beijing 100871, China
| | - Dong-Hui Wang
- State Key Laboratory of Protein and Plant Gene Research, College of Life Sciences, Peking University, Beijing 100871, China
| | - Fu-Gui Wang
- Center for Quantitative Biology, Peking University, Beijing 100871, China; School of Mathematical Sciences, Peking University, Beijing 100871, China
| | - Hong-Yun Zeng
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
| | - Zhi-Shan Chen
- State Key Laboratory of Protein and Plant Gene Research, College of Life Sciences, Peking University, Beijing 100871, China
| | - Yi-Ben Peng
- State Key Laboratory of Protein and Plant Gene Research, College of Life Sciences, Peking University, Beijing 100871, China
| | - Ya-Nan Lin
- State Key Laboratory of Protein and Plant Gene Research, College of Life Sciences, Peking University, Beijing 100871, China
| | - Xing Tang
- State Key Laboratory of Protein and Plant Gene Research, College of Life Sciences, Peking University, Beijing 100871, China; Center for Bioinformatics, Peking University, Beijing 100871, China
| | - Ming-Hua Deng
- Center for Quantitative Biology, Peking University, Beijing 100871, China; School of Mathematical Sciences, Peking University, Beijing 100871, China
| | - Nan Yao
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
| | - Jing-Chu Luo
- State Key Laboratory of Protein and Plant Gene Research, College of Life Sciences, Peking University, Beijing 100871, China; Center for Bioinformatics, Peking University, Beijing 100871, China
| | - Zhi-Hong Xu
- State Key Laboratory of Protein and Plant Gene Research, College of Life Sciences, Peking University, Beijing 100871, China
| | - Shu-Nong Bai
- Center for Quantitative Biology, Peking University, Beijing 100871, China; The National Center of Plant Gene Research, Beijing 100871, China; State Key Laboratory of Protein and Plant Gene Research, College of Life Sciences, Peking University, 624 Jin-Guang Life Science Building, 5 Yiheyuan Road, Beijing 100871, China.
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Nguyen V, Fleury D, Timmins A, Laga H, Hayden M, Mather D, Okada T. Addition of rye chromosome 4R to wheat increases anther length and pollen grain number. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2015; 128:953-64. [PMID: 25716820 DOI: 10.1007/s00122-015-2482-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Accepted: 02/09/2015] [Indexed: 05/25/2023]
Abstract
The research identified rye chromosome 4R arms associated with good pollinator traits, and demonstrated possible use of rye genetic resources to develop elite pollinators for hybrid wheat breeding. Bread wheat (Triticum aestivum) is a predominantly self-pollinating plant which has relatively small-sized anthers and produces a low number of pollen grains. These features limit the suitability of most wheat lines as pollinators for hybrid seed production. One strategy for improving the pollination ability of wheat is to introgress cross-pollination traits from related species. One such species is rye (Secale cereale L.), which has suitable traits such as high anther extrusion, long anthers containing large amounts of pollen and long pollen viability. Therefore, introducing these traits into wheat is of great interest in hybrid wheat breeding. Here, we investigated wheat-rye chromosome addition lines for the effects of rye chromosomes on anther and pollen development in wheat. Using a single nucleotide polymorphism genotyping array, we detected 984 polymorphic markers that showed expected syntenic relationships between wheat and rye. Our results revealed that the addition of rye chromosomes 1R or 2R reduced pollen fertility, while addition of rye chromosome 4R increased anther size by 16% and pollen grain number by 33%. The effect on anther length was associated with increases in both cell size and the number of endothecium cells and was attributed to the long arm of chromosome 4R. In contrast, the effect on pollen grain number was attributed to the short arm of chromosome 4R. These results indicate that rye chromosome 4R contains at least two genetic factors associated with increased anther size and pollen grain number that can favourably affect pollination traits in wheat.
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Affiliation(s)
- Vy Nguyen
- Australian Centre for Plant Functional Genomics and School of Agriculture, Food and Wine, Waite Research Institute, The University of Adelaide, Glen Osmond, SA, 5064, Australia
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