The molecular basis of the interaction between Brassinosteroid induced and phosphorous deficiency induced leaf inclination in rice

文献类型： 外文期刊

第一作者： Zou, Linyuan

作者： Zou, Linyuan;Qu, Minghao;Zeng, Longjun;Xiong, Guosheng;Xiong, Guosheng

作者机构：

关键词： Plant architecture; Leaf inclination; Lamina joint; Phosphate starvation response; BR signaling

期刊名称：PLANT GROWTH REGULATION （ 影响因子：3.412； 五年影响因子：3.691 ）

ISSN： 0167-6903

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页码：

收录情况： SCI

摘要： The phosphorous deficiency in arable land limits crop production globally. Plants developed a set of coordinated biochemical and developmental responses to cope with Pi deficiency during evolution. One of typical developmental responses to Pi deficiency is the induction of leaf erectness, which reduced the light capture ability and inhibited photosynthesis to conserve Pi in rice. It has been revealed that Pi deficiency induced leaf inclination by regulating the expression of BR pathway genes. However, how canonic BR signaling coordinates Pi deficiency responses in rice lamina joint development was not clear. Understanding mechanism underlying Pi-deficiency-induced leaf inclination enable us to breed new rice cultivars with increased Pi efficiency. Here we reported the molecular mechanism underlying the interaction of phosphorous deficiency-induced and BR-induced leaf inclination. We showed that BR deficiency can attenuate the leaf inclination by compromising Pi deficiency-induced BU1 expression and that constitutively activated or repressed BR signaling resulted in the insensitivity of Pi deficiency-induced leaf inclination. Furthermore, we compared expression profile of WT and BR signaling constitutively activated or repressed transgenic plants under normal and deficient phosphorous conditions by RNA-seq analysis. Our work revealed the complexity of Pi deficiency stress-induced and BR induced leaf inclinations in rice.

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