近日,中国科学技术大学赵忠、田朝霞等研究人员合作发现,WUSCHEL在植物干细胞中触发先天抗病毒免疫。该项研究成果发表在2020年10月9日出版的《科学》杂志上。
Title: WUSCHEL triggers innate antiviral immunity in plant stem cells
Author: Haijun Wu, Xiaoya Qu, Zhicheng Dong, Linjie Luo, Chen Shao, Joachim Forner, Jan U. Lohmann, Meng Su, Mengchu Xu, Xiaobin Liu, Lei Zhu, Jian Zeng, Sumei Liu, Zhaoxia Tian, Zhong Zhao
Issue&Volume: 2020/10/09
Abstract: Stem cells in plants constantly supply daughter cells to form new organs and are expected to safeguard the integrity of the cells from biological invasion. Here, we show how stem cells of the Arabidopsis shoot apical meristem and their nascent daughter cells suppress infection by cucumber mosaic virus (CMV). The stem cell regulator WUSCHEL responds to CMV infection and represses virus accumulation in the meristem central and peripheral zones. WUSCHEL inhibits viral protein synthesis by repressing the expression of plant S-adenosyl-L-methionine–dependent methyltransferases, which are involved in ribosomal RNA processing and ribosome stability. Our results reveal a conserved strategy in plants to protect stem cells against viral intrusion and provide a molecular basis for WUSCHEL-mediated broad-spectrum innate antiviral immunity in plants.
DOI: 10.1126/science.abb7360
Source: https://science.sciencemag.org/content/370/6513/227