Ostkpr1 functions in anther cuticle development and pollen wall formation in rice
- Shanghai Jiao Tong Univ. (China). School of Life Sciences and Biotechnology. Shanghai Jiao Tong Univ.-Univ. of Adelaide Joint Centre for Agriculture and Health. Joint International Research Lab. of Metabolic & Developmental Sciences; Shanghai Jiao Tong Univ. (China). School of Life Sciences and Biotechnology. Flow Station of Post-doctoral Scientific Research
- Shanghai Jiao Tong Univ. (China). School of Life Sciences and Biotechnology. Shanghai Jiao Tong Univ.-Univ. of Adelaide Joint Centre for Agriculture and Health. Joint International Research Lab. of Metabolic & Developmental Sciences
- Univ. of Adelaide, SA (Australia). Food and Wine. School of Agriculture
- Shanghai Jiao Tong Univ. (China). School of Life Sciences and Biotechnology. Shanghai Jiao Tong Univ.-Univ. of Adelaide Joint Centre for Agriculture and Health. Joint International Research Lab. of Metabolic & Developmental Sciences; Univ. of Adelaide, SA (Australia). Food and Wine. School of Agriculture
Background: During pollen wall formation in flowering plants, a conserved metabolon consisting of acyl-CoA synthetase (ACOS), polyketide synthase (PKS) and tetraketide α-pyrone reductase (TKPR), is required for sporopollenin synthesis. Despite this, the precise function of each of these components in different species remains unclear. Results: In this study, we characterized the function of OsTKPR1, a rice orthologue of Arabidopsis TKPR1. Loss of function of OsTKPR1 delayed tapetum degradation, reduced the levels of anther cuticular lipids, and impaired Ubisch body and pollen exine formation, resulting in complete male sterility. In addition, the phenylpropanoid pathway in mutant anthers was remarkably altered. Localization studies suggest that OsTKPR1 accumulates in the endoplasmic reticulum, while specific accumulation of OsTKPR1 mRNA in the anther tapetum and microspores is consistent with its function in anther and pollen wall development. Conclusions: Our results show that OsTKPR1 is indispensable for anther cuticle development and pollen wall formation in rice, providing new insights into the biochemical mechanisms of the conserved sporopollenin metabolon in flowering plants.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1626851
- Journal Information:
- BMC Plant Biology, Vol. 19, Issue 1; ISSN 1471-2229
- Publisher:
- BioMed CentralCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Tapetum-Dependent Male Meiosis Progression in Plants: Increasing Evidence Emerges
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journal | January 2020 |
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