Calcineurin B-like interacting protein kinase OsCIPK23 functions in pollination and drought stress responses in rice (Oryza sativa L.)

a.
Institute of Genetics and Developmental Biology, Chinese Academy of Sciences; National Centre for Plant Gene Research, Beijing 100190, China
b.
Graduate School of Chinese Academy of Sciences, Beijing 100049, China

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Corresponding author: E-mail address: ybxue@genetics.ac.cn (Yongbiao Xue)

摘要

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Abstract: Drought is very harmful to grain yield due to its adverse effect on reproduction, especially on pollination process in rice. However, the molecular basis of such an effect still remains largely unknown. Here, we report the role of a member of CBL (Calcineurin B-Like) Interacting Protein Kinase (CIPK) family, OsCIPK23, in pollination and stress responses in rice. Molecular analyses revealed that it is mainly expressed in pistil and anther but up-regulated by pollination, as well as by treatments of various abiotic stresses and phytohormones. RNA interference-mediated suppression ofOsCIPK23 expression significantly reduced seed set and conferred a hypersensitive response to drought stress, indicating its possible roles in pollination and drought stress. In consistent, overexpression of OsCIPK23 induced the expression of several drought tolerance related genes. Taken together, these results indicate that OsCIPK23 is a multistress induced gene and likely mediates a signaling pathway commonly shared by both pollination and drought stress responses in rice.
- water /
- pollination /
- drought

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参考文献(49)

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