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Chinese Agricultural Science Bulletin ›› 2021, Vol. 37 ›› Issue (32): 127-131.doi: 10.11924/j.issn.1000-6850.casb2021-0034

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Effects of Two Inducers on Induced Resistance to Grapevine Downy Mildew

Wang Xiaolin1(), Wu Qinyan1, Peng Yanqiong2, Wu Jie1, Huang Jiexue1, Mao Nini1, Ji Muxiang1()   

  1. 1Zhenjiang Institute of Agricultural Science in Hilly Area of Jiangsu Province, Jurong Jiangsu 212400
    2Jiangsu Vocational College of Agriculture and Forestry, Jurong Jiangsu 212499
  • Received:2021-01-13 Revised:2021-05-16 Online:2021-11-15 Published:2022-01-07
  • Contact: Ji Muxiang E-mail:morethan365@126.com;jilvdun2800@163.com

Abstract:

In order to provide references for resistance inducing agent for grapevine downy mildew control, the resistance effects of different inducers applied on grapevine downy mildew were evaluated, furthermore the physiological mechanism of resistance were explored. In this paper, the leaf spray method was used to investigate the resistance inducing effect of 2 kinds of inducers on grapevine downy mildew. The results showed that the two resistance inducers had better control effect on grapevine downy mildew, and β-1,3-glucooligosaccharides with 10 times dilution had the best control efficiency (65.44%). Compared with the control group, β-1,3-glucooligosaccharides with 10 times dilution could significantly increase the activities of superoxide dismutase (SOD), peroxidase (POD) and chitinase (CHI), phenylalanine ammonia-lyase (PAL) in grape leaves at 3-day and 7-day after treatment. Taken together, this study confirms that β-1,3-glucooligosaccharides with 10 times dilution can induce grape leaves to produce systemic resistance through enhancing the activities of defense enzymes and resistance related protein, and sever as a resistance inducer applying for grapevine downy mildew control.

Key words: grape, inducer, downy mildew, resistance inducing, control effect

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