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Wang Q, Lin Q, Wu T, Duan E, Huang Y, Yang C, Mou C, Lan J, Zhou C, Xie K, Liu X, Zhang X, Guo X, Wang J, Jiang L, Wan J. OsDOG1L-3 regulates seed dormancy through the abscisic acid pathway in rice. Plant Sci 2020; 298:110570. [PMID: 32771171 DOI: 10.1016/j.plantsci.2020.110570] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Revised: 06/12/2020] [Accepted: 06/15/2020] [Indexed: 06/11/2023]
Abstract
Seed dormancy is closely related to pre-harvest sprouting resistance. Both plant hormone abscisic acid (ABA) and DELAY OF GERMINATION 1 (DOG1) protein are key regulators of seed dormancy. Their relationship is well reported in Arabidopsis, but little is known in rice. Here, we show that a quantitative trait locus, qSd-1-1 contributes significantly to seed dormancy differences between the strongly dormant indica variety N22 and non-dormant japonica variety Nanjing35. It encodes a DOG1-like protein named OsDOG1L-3 with homology to Arabidopsis DOG1. There were evident promoter and expression differences in OsDOG1L-3 between N22 and Nanjing35, and overexpression or introduction of the N22 OsDOG1L-3 allele in Nanjing35 enhanced its seed dormancy. OsDOG1L-3 expression was positively correlated with seed dormancy and induced by ABA. OsbZIP75 and OsbZIP78 bound directly with the promoter of OsDOG1L-3 to induce its expression. Overexpression of OsbZIP75 increased OsDOG1L-3 protein abundance and promoted seed dormancy. OsDOG1L-3 upregulated expression of ABA-related genes and increased ABA content. We propose that the N22 OsDOG1L-3 allele is a candidate gene for the seed dormancy in QTL qSd-1-1, and that it participates in the ABA pathway to establish seed dormancy in rice.
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Affiliation(s)
- Qian Wang
- State Key Laboratory for Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, China
| | - Qibing Lin
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Tao Wu
- State Key Laboratory for Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, China
| | - Erchao Duan
- State Key Laboratory for Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yunshuai Huang
- State Key Laboratory for Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, China
| | - Chunyan Yang
- State Key Laboratory for Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, China
| | - Changling Mou
- State Key Laboratory for Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, China
| | - Jie Lan
- State Key Laboratory for Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, China
| | - Chunlei Zhou
- State Key Laboratory for Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, China
| | - Kun Xie
- State Key Laboratory for Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, China
| | - Xi Liu
- State Key Laboratory for Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, China
| | - Xin Zhang
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Xiuping Guo
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Jie Wang
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Ling Jiang
- State Key Laboratory for Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Jianmin Wan
- State Key Laboratory for Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, China; National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.
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