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991.
Tingting Ding Feng Zhang Junxia Wang Fengxia Wang Jiajia Liu Chuantian Xie Yangjie Hu Eilon Shani Xiangpei Kong Zhaojun Ding Huiyu Tian 《The Plant journal : for cell and molecular biology》2021,106(4):928-941
The plant hormone auxin plays a critical role in root growth and development; however, the contributions or specific roles of cell-type auxin signals in root growth and development are not well understood. Here, we mapped tissue and cell types that are important for auxin-mediated root growth and development by manipulating the local response and synthesis of auxin. Repressing auxin signaling in the epidermis, cortex, endodermis, pericycle or stele strongly inhibited root growth, with the largest effect observed in the endodermis. Enhancing auxin signaling in the epidermis, cortex, endodermis, pericycle or stele also caused reduced root growth, albeit to a lesser extent. Moreover, we established that root growth was inhibited by enhancement of auxin synthesis in specific cell types of the epidermis, cortex and endodermis, whereas increased auxin synthesis in the pericycle and stele had only minor effects on root growth. Our study thus establishes an association between cellular identity and cell type-specific auxin signaling that guides root growth and development. 相似文献
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Ruiqi Liu Tingting Chen Xiao Yin Gaoqing Xiang Jing Peng Qingqing Fu Mengyuan Li Boxing Shang Hui Ma Guotian Liu Yuejin Wang Yan Xu 《The Plant journal : for cell and molecular biology》2021,106(6):1557-1570
Pathogens secrete a large number of effectors that manipulate host processes to create an environment conducive to pathogen colonization. However, the underlying mechanisms by which Plasmopara viticola effectors manipulate host plant cells remain largely unclear. In this study, we reported that RXLR31154, a P. viticola RXLR effector, was highly expressed during the early stages of P. viticola infection. In our study, stable expression of RXLR31154 in grapevine (Vitis vinifera) and Nicotiana benthamiana promoted leaf colonization by P. viticola and Phytophthora capsici, respectively. By yeast two-hybrid screening, the 23-kDa oxygen-evolving enhancer 2 (VpOEE2 or VpPsbP), encoded by the PsbP gene, in Vitis piasezkii accession Liuba-8 was identified as a host target of RXLR31154. Overexpression of VpPsbP enhanced susceptibility to P. viticola in grapevine and P. capsici in N. benthamiana, and silencing of NbPsbPs, the homologs of PsbP in N. benthamiana, reduced P. capcisi colonization, indicating that PsbP is a susceptibility factor. RXLR31154 and VpPsbP protein were co-localized in the chloroplast. Moreover, VpPsbP reduced H2O2 accumulation and activated the 1O2 signaling pathway in grapevine. RXLR31154 could stabilize PsbP. Together, our data revealed that RXLR31154 reduces H2O2 accumulation and activates the 1O2 signaling pathway through stabilizing PsbP, thereby promoting disease. 相似文献
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Rong Yu Shiyu Wen Qiaona Wang Congying Wang Liping Zhang Xingxin Wu Jianmei Li Lingdong Kong 《Journal of neurochemistry》2021,157(6):1979-1991