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Efficiency of chitosan application against Phytophthora infestans and the activation of defence mechanisms in potato

文献类型： 外文期刊

作者： Zheng, Kangkai 1 ; Lu, Jie 1 ; Li, Jie 1 ; Yu, Yin 1 ; Zhang, Jia 1 ; He, Ziwei 1 ; Omayma M Ismail 3 ; Wu, Jie 4 ; Xie, Xue 1 ;

作者机构： 1.China Agr Univ, Coll Plant Protect, Dept Plant Pathol, Beijing 100193, Peoples R China

2.Heilongjiang Acad Agr Sci, Harbin 150086, Peoples R China

3.Natl Res Ctr NRC, Hort Crop Technol, Cairo 12311, Egypt

4.Hebei Acad Agr & Forestry Sci, IPM Ctr Hebei Prov, Inst Plant Protect, Baoding 071000, Peoples R China

5.Changzhou Inst Technol, Changzhou 213032, Peoples R China

6.Guangdong Acad Agr Sci, Crops Res Inst, Guangdong Prov Key Lab Crop Genet Improvement, Guangzhou 510640, Guangdong, Peoples R China

关键词： Chitosan; RNA-seq; Potato plant defence; Phytophthora infestans; efficiency

期刊名称：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES （ 影响因子：6.953； 五年影响因子：6.737 ）

ISSN： 0141-8130

年卷期： 2021 年 182 卷

页码：

收录情况： SCI

摘要： Late blight, caused by the oomycete Phytophthora infestans, is one of the most devastating diseases that results in huge losses of potato crops worldwide. Chitosan as a defence elicitor can induce plant innate immunity against pathogen infection, but the efficiency and specific defence mechanism of chitosan against late blight in potato have not been elaborated. In this study, we demonstrated that the application of chitosan significantly enhanced potato resistance and reduced P. infestans infection in potted potato and in the field. Large-scale transcriptomic analysis suggested that chitosan preferentially activated several important pathways related to the plant defence response. Notably, we revealed that chitosan triggered pattern-triggered immunity responses in potato. Chitosan could trigger pattern recognition receptors to initiate intracellular signalling, and gradually amplify the immune signal. qRT-PCR verification showed that chitosan induced the expression of defence-related genes in potato. Moreover, treatment with chitosan result in Induced Systemic Resistance (ISR) in potato, including an accumu-lation of plant hormone salicylic acid, increase in the level of phenylalanine ammonia lyase activity anda content decrease of malondialdehyde. These findings help elucidate chitosan-mediated activation of the immune system in potato and provide a potential ecofriendly strategy to control potato late blight in the field. (c) 2021 Elsevier B.V. All rights reserved.

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