RAL6 encodes a seed allergenic protein that positively regulates grain weight and seed germination
文献类型： 外文期刊
作者： Yan, Xin 1 ; Zhou, Wei 2 ; Huang, Xirui 1 ; Ouyang, Jiexiu 1 ; Li, Shaobo 1 ; Gao, Jiadong 3 ; Wang, Xin 1 ;
作者机构： 1.Nanchang Univ, Coll Life Sci, Key Lab Mol Biol & Gene Engn Jiangxi Prov, Nanchang 330031, Peoples R China
2.Xinyang Normal Univ, Coll Life Sci, Xinyang 464000, Peoples R China
3.Guangdong Key Lab Crop Germplasm Resources Preserv, Guangzhou 510640, Peoples R China
4.Guangdong Acad Agr Sci, Agro Biol Gene Res Ctr, Guangzhou 510555, Peoples R China
关键词： Germination; Grain weight; Oryza sativa; RAL6; Rice albumin
期刊名称：JOURNAL OF PLANT RESEARCH （ 影响因子：2.3； 五年影响因子：2.9 ）
ISSN： 0918-9440
年卷期： 2024 年 137 卷 6 期
页码：
收录情况： SCI
摘要： The rice albumin (RAG) gene family belongs to the Tryp_alpha_amyl family. RAG2, specifically expressed in 14-21 DAP (days after pollination) seeds, regulates grain yield and quality. In this study, we identified another RAG family gene, RAL6, which exhibits specific expression in developing seeds, particularly in 7, 10, and 15 DAP seeds. Employing the CRISPR/Cas9 system, we analyzed functions of RAL6 and found that the ral6 lines (ral6-1, ral6-2, ral6-3, and ral6-4) displayed thinner seeds with significantly decreased 1000-grain weight and grain thickness compared to ZH11. Additionally, the cell width of spikelet cells, total protein and glutelin contents were significantly reduced in ral6. The germination assay and 1% TTC staining revealed a significant decrease in seed vigor among the ral6 lines. The alpha-amylase activity in ral6 mutant seeds was also markedly lower than in ZH11 seeds after 2 days of imbibition. Furthermore, co-expression analysis and GO annotation showed that co-expressed genes were involved in immune response, oligopeptide transport, and the glucan biosynthetic process. Collectively, our findings suggest that RAL6 plays a coordinating role in regulating grain weight and seed germination in rice.
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