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OrMKK3 Influences Morphology and Grain Size in Rice

文献类型： 外文期刊

作者： Pan, Ying Hua 1 ; Gao, Li Jun 2 ; Liang, Yun Tao 1 ; Zhao, Yan 3 ; Liang, Hai Fu 1 ; Chen, Wei Wei 1 ; Yang, Xing Hai; 1 ;

作者机构： 1.Guangxi Acad Agr Sci, Rice Res Inst, Guangxi Key Lab Rice Genet & Breeding, Nanning 530007, Peoples R China

2.Guangxi Acad Agr Sci, Guangxi Crop Genet Improvement & Biotechnol Lab, Nanning 530007, Peoples R China

3.Shandong Agr Univ, Coll Agron, State Key Lab Crop Biol, Shandong Key Lab Crop Biol, Tai An 271018, Shandong, Peoples R China

关键词： Oryza officinalis Wall; ex Watt; OrMKK3; Morphology; Grain size

期刊名称：JOURNAL OF PLANT BIOLOGY （ 影响因子：2.434； 五年影响因子：2.455 ）

ISSN： 1226-9239

年卷期：

页码：

收录情况： SCI

摘要： Although morphology and grain size are important to rice growth and yield, the identity of abundant natural allelic variations that determine agronomically important differences in crops is unknown. Here, we characterized the function of mitogen-activated protein kinase 3 from Oryza officinalis Wall. ex Watt encoded by OrMKK3. Different alternative splicing variants occurred in OrMKK3. Green fluorescent protein (GFP)-OrMKK3 fusion proteins localized to the cell membrane and nuclei of rice protoplasts. Overexpression of OrMKK3 influenced the expression levels of the grain size-related genes SMG1, GW8, GL3, GW2, and DEP3. Phylogenetic analysis showed that OrMKK3 is well conserved in plants while showing large amounts of variation between indica, japonica, and wild rice. In addition, OrMKK3 slightly influenced brassinosteroid (BR) responses and the expression levels of BR-related genes. Our findings thus identify a new gene, OrMKK3, influencing morphology and grain size and that represents a possible link between mitogen-activated protein kinase and BR response pathways in grain growth.

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