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Physiological response and Resistance of Plants to Disease and Pest Stress

Plant Diseases and Pests 2024年第4期15卷 1-6,12页

作者： Cong CHEN Xiaoxia CAI Yimin PENG Lingling LIU Zilei LIANG Guangzu DU Yanjun GUO Institute of Pomology/College of Life Sciences Zhaoqing UniversityZhaoqing 526061China College of Plant Protection Yunnan Agricultural University/State Key Laboratory for Conservation and Utilization of Bio-Resources in YunnanKunming 650201China

This paper outlines the physiological responses of plants to pathogenic microbial infection and pest feeding stress,as well as the resistance characteristics of plants to diseases and pests,and proposes new directions for future research on crop resistance to diseases and *** objective of this paper is to provide a reference framework for the breeding of crops with enhanced resistance to diseases and pests,the utilization of natural immunity in crops,and the efficient prevention and control of diseases and *** framework is intended to facilitate the healthy and sustainable development of the agricultural industry.

关键词： Pathogenic microorganism Pest Disease resistance Pest resistance Resistance breeding defensive response

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The Signal Peptide-like Segment Affects HpaXm Transport,but without the Pathogenicity of Xanthomonas citri ***

The Signal Peptide-like Segment Affects HpaXm Transport,but ...

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中国植物病理学会2016年学术年会

作者： LIU Yue MIAO Wei-guo ZHENG Fu-cong Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource/College of Environment and Plant Protection Hainan University

HpaXm,encoded by the hpaXm gene of Xanthomonas citri ***(Xcm),is a novel harpin protein described from cotton leaf blight *** predicted that the N-terminal leader peptide(1- MNSLNTQIGANSSFL- 15) was a putative signal peptide of hpaXm,and determined here whether this segment are related to HpaXm transport or the pathogenicity of the pathogen ***,transgenic tobacco lines expressing the full-length hpaXm and the signal peptide-like segment-deleted mutant hpaXm△LP were developed using transformation mediated by Agrobacterium *** the extracted soluble-protein activity was *** the defensive responses and resistance to tobacco mosaic virus(TMV) of transgenic tobacco were ***,differences in the association sites between the endogenously expressed hpaXm and hpaXm△LP in transgenic tobacco tissues were *** identification showed that the target genes had already integrated into the recipient genomes of transgenic tobacco respectively and were expressed *** proteins extracted from plants transformed with hpaXm and hpaXm△LP were *** responses of hpaXm and hpaXm△LP as micro-HR were observed on transgenic tobacco *** resistance bioassays showed that tobacco plants transformed with hpaXm had slightly enhanced resistance to TMV compared to those transformed with hpaXm△*** colloidal-gold detection showed that the hpaXm expressed in transgenic tobaccos was transferred to the plasma membrane and the cell wall of tobacco,but in the deletion mutant hpaXm△LP expressed in transgenic tobacco could not cross the membrane to reach the cell *** summary,the N-terminal signal peptide-like fragment(1 5bp) in HpaXm sequence was not necessary for endogenous expression and bioactivity of HpaXm in transgenic tobacco and the pathogenicity of Xanthomonas citri *** in the deletion mutant it prevented hpaXm△LP being transferred to the cell wall

关键词： HpaXm Suspected signal peptide HR reaction defensive response Immune colloidal gold position

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