数字农科院2.0

Interactions of Oryza sativa OsCONTINUOUS VASCULAR RING-LIKE 1 (OsCOLE1) and OsCOLE1-INTERACTING PROTEIN reveal a novel intracellular auxin transport mechanism

文献类型： 外文期刊

作者： Liu, Fei;Zhang, Lan;Luo, Yanzhong;Xu, Miaoyun;Fan, Yunliu;Wang, Lei

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关键词： auxin transport;OsCOV-LIKE 1 (OsCOLE1)-INTERACTING PROTEIN (OsCLIP);OsCOV-LIKE 1 (OsCOLE1);rice (Oryza sativa);vacuole

期刊名称： NEW PHYTOLOGIST

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收录情况： SCI

摘要： Little is known about the transport mechanism of intracellular auxin. Here, we report two vacuole-localized proteins, Oryza sativa OsCONTINUOUS VASCULAR RING-LIKE 1 (OsCOLE1) and OsCOLE1-INTERACTING PROTEIN (OsCLIP), that regulate intracellular auxin transport and homoeostasis. Overexpression of OsCOLE1 markedly increased the internode length and auxin content of the stem base, whereas these parameters were decreased in RNA interference (RNAi) plants. OsCOLE1 was localized on the tonoplast and preferentially expressed in mature tissues. We further identified its interacting protein OsCLIP, which was co-localized on the tonoplast. Protein-protein binding assays demonstrated that the N-terminus of OsCOLE1 directly interacted with OsCLIP in yeast cells and the rice protoplast. Furthermore, H-3-indole-3-acetic acid (H-3-IAA) transport assays revealed that OsCLIP transported IAA into yeast cells, which was promoted by OsCOLE1. The results indicate that OsCOLE1 affects rice development by regulating intracellular auxin transport through interaction with OsCLIP, which provides a new insight into the regulatory mechanism of intracellular transport of auxin and the roles of vacuoles in plant development.

分类号： Q94

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