WEAK SEED DORMANCY 1, an aminotransferase protein, regulates seed dormancy in rice through the GA and ABA pathways
文献类型: 外文期刊
第一作者: Huang, Yunshuai
作者: Huang, Yunshuai;Song, Jiawei;Hao, Qixian;Mou, Changling;Wu, Hongming;Zhang, Fulin;Zhu, Ziyan;Wang, Ping;Ma, Tengfei;Fu, Kai;Chen, Yaping;Nguyen, Thanhliem;Liu, Shijia;Jiang, Ling;Wan, Jianmin;Wan, Jianmin;Nguyen, Thanhliem
作者机构: Nanjing Agr Univ, Natl Key Lab Crop Genet & Germplasm Enhancement &, Jiangsu Nanjing Natl Field Sci Observat & Res Stn, Nanjing 210095, Peoples R China;Inst Crop Sci, Chinese Acad Agr Sci, Natl Key Facil Crop Gene Resources & Genet Improve, Beijing 100081, Peoples R China;Quynhon Univ, Fac Nat Sci, Quynhon 590000, Binhdinh, Vietnam
关键词: Seed germination; Oryza sativa; Pre-harvest sprouting; WSD1
期刊名称:PLANT PHYSIOLOGY AND BIOCHEMISTRY ( 2022影响因子:6.5; 五年影响因子:6.4 )
ISSN: 0981-9428
年卷期: 2023 年 202 卷
收录情况: SCI
摘要: Seed dormancy is a critical trait that enhances plant survival by preventing seed germination at the wrong time or under unsuitable conditions. Lack of seed dormancy in rice can lead to pre-harvest sprouting on mother plants leading to reduced yield and seed quality. Although some genes have been identified, knowledge of regulation of seed dormancy is limited. Here, we characterized a weak seed dormancy mutant named weak seed dormancy 1 (wsd1) that showed a higher seed germination percentage than the wild-type following the harvest ripeness. We cloned the WSD1 encoding an aminotransferase protein using a MutMap approach. WSD1 was stably expressed after imbibition and its protein was localized in the endoplasm reticulum. A widely targeted metabolomics assay and amino acid analysis showed that WSD1 had a role in regulating homeostasis of amino acids. PAC treatment and RNA-seq analysis showed that WSD1 regulates seed dormancy by involvement in the GA biosynthesis pathway. GA1 content and expression of GA biosynthesis-related genes were increased in the wsd1 mutant compared with the wild-type. The wsd1 mutant had reduced sensitivity to ABA. Our overall results indicated that WSD1 regulates seed dormancy by balancing the ABA and GA pathways.
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