A mitogen‐activated protein kinase phosphatase influences grain size and weight in rice
| Autor: | Junmin Wang, Haiyue Yu, Na Li, Jinsong Xu, Jing Li, Yunhai Li, Penggen Duan, Baolan Zhang, Jia Lyu, Tuanyao Chai, Ran Xu, Yu Li |
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| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
biology Edible Grain Kinase Phosphatase Mutant food and beverages Oryza Cell Biology Plant Science Genes Plant Grain size Cell biology 03 medical and health sciences 030104 developmental biology Mitogen-activated protein kinase Mutation Genetics biology.protein Mitogen-Activated Protein Kinase Phosphatases Phosphorylation Protein kinase A Cell Proliferation Plant Proteins |
| Zdroj: | The Plant Journal. 95:937-946 |
| ISSN: | 1365-313X 0960-7412 |
| Popis: | Grain size and weight are directly associated with grain yield in crops. However, the molecular mechanisms that set final grain size and weight remain largely unknown. Here, we characterize two large grain mutants, large grain8-1 (large8-1) and large grain8-2 (large8-2). LARGE8 encodes the mitogen-activated protein kinase phosphatase1 (OsMKP1). Loss of function mutations in OsMKP1 results in large grains, while overexpression of OsMKP1 leads to small grains. OsMKP1 determines grain size by restricting cell proliferation in grain hulls. OsMKP1 directly interacts with and deactivates the mitogen-activated protein kinase 6 (OsMAPK6). Taken together, we identify OsMKP1 as a crucial factor that influences grain size by deactivating OsMAPK6, indicating that the reversible phosphorylation of OsMAPK6 plays important roles in determining grain size in rice. |
| Databáze: | OpenAIRE |
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