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journal1 ›› 2018, Vol. 34 ›› Issue (5): 762-770.DOI: 10.16409/j.cnki.2095-039x.2018.05.016

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Effect of Trichoderma on the Growth of Cucumber Seedlings, Membrane Lipid Indexes and Control Effect against Fusarium Wilt

GAO Changmin1, MA Guangshu1, LIAN Hua1, LIU mingxin1, ZHANG Chunqiu1, QU Hongyun2   

  1. 1. College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing 163319, China;
    2. Heilongjiang Academy of Agricultural Sciences Horticulture Branch, Harbin 150069, China
  • Received:2018-02-01 Online:2018-10-08 Published:2018-10-15

Abstract: Cucumber Fusarium wilt is one of the major destructive soil-borne disease in the cucumber production, and the application of biocontrol fungi to control cucumber wilt is of great significance to the safe production of cucumber. To clarify the effect of biocontrol Trichoderma on the growth of cucumber seedlings, membrane lipid peroxidation and the control effect against cucumber Fusarium wilt, three antagonistic fungi against pathogen of cucumber Fusarium wilt, T. asperellum 525, T. harzianum 610 and T. pseudokoningii 886, were used to carry out pot experiment in this paper. The results showed that the field control effect of three Trichoderma strains against cucumber Fusarium wilt were more than 78%, and the field control effect of T. asperellum 525 was the highest, reaching 81.53%. Compared with the treatment with the cucumber Fusarium Wilt pathogen alone, all those treatments with Trichoderma alone and simultaneous inoculation with Trichoderma and pathogen significantly improved cucumber plant height, stem diameter, leaf area, root volume, above ground fresh weight and underground fresh weight of cucumber, increased the activities of superoxide dismutase (SOD), peroxidase (POD), catalase (CAT) and polyphenol oxidase (PPO) activity, and decreased membrane permeability and malondialdehyde (MDA) content. The results indicated that the three Trichoderma strains have the function of controlling cucumber Fusarium wilt and promoting growth of cucumber. Trichoderma can induce cucumber resistance to Fusarium wilt by promoting cucumber seedling growth, increasing plant antioxidant enzyme activity and reducing plasma membrane permeability and malondialdehyde content.

Key words: Trichoderma, cucumber Fusarium wilt, seedlings growth, membrane lipid peroxidation

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