数字农科院2.0

RepA Protein Encoded by Oat dwarf virus Elicits a Temperature-Sensitive Hypersensitive Response-Type Cell Death That Involves Jasmonic Acid-Dependent Signaling

文献类型： 外文期刊

作者： Hou, Huwei;Shen, Qingtang;Cai, Xinzhong;Zhou, Xueping;Hou, Huwei;Zhou, Xueping;Sunter, Garry

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期刊名称： MOLECULAR PLANT-MICROBE INTERACTIONS

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收录情况： SCI

摘要： The hypersensitive response (HR) is a component of disease resistance that is often induced by pathogen infection, but essentially no information is available for members of the destructive mastreviruses. We have investigated an HR-type response elicited in Nicotiana species by Oat dwarf virus (ODV) and have found that expression of the ODV RepA protein but not other ODV-encoded proteins elicits the HR-type cell death associated with a burst of H2O2. Deletion mutagenesis indicates that the first nine amino acids (aa) at the N terminus of RepA and the two regions located between aa residues 173 and 195 and between aa residues 241 and 260 near the C terminus are essential for HR-type cell-death elicitation. Confocal and electron microscopy showed that the RepA protein is localized in the nuclei of plant cells and might contain bipartite nuclear localization signals. The HR-like lesions mediated by RepA were inhibited by temperatures above 30 degrees C and involvement of jasmonic acid (JA) in HR was identified by gain- and loss-of function experiments. To our knowledge, this is the first report of an elicitor of HR-type cell death from mastreviruses.

分类号： Q94

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