The antimicrobial peptaibol trichokonin IV promotes plant growth and induces systemic resistance against Botrytis cinerea infection in moth orchid.

Autor: Zhao, Peibao, Ren, Aizhi, Dong, Ping, Sheng, Yinsheng, Chang, Xue, Zhang, Xiusheng
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Zdroj: Journal of Phytopathology; May2018, Vol. 166 Issue 5, p346-354, 9p
Abstrakt: Abstract: Trichokonins (TKs) are antimicrobial peptaibols that are extracted from Trichoderma pseudokoningii strain SMF2. We discovered that TK VI, the primary active constituent of TKs, not only promotes growth, but also induces systemic resistance against grey mould caused by Botrytis cinerea in moth orchid (Phalaenopsis). Firstly, following treatment with TK VI, the growth of several varieties of Phalaenopsis increased relative to the control treatment. Both the aboveground and belowground biomass increased, particularly the length, superficial area, volume and root branching. Secondly, treatment with TK VI by either root or foliar application controlled grey mould on the moth orchids. Following irrigation with TK VI, the activities of defence‐related enzymes, including peroxidase, polyphenol oxidase and phenylalanine ammonia‐lyase, and the resistance‐related enzymes, including superoxide dismutase and catalase, all increased, while those of harmful substance malondialdehyde decreased. These findings indicated that induced systemic resistance was the primary mechanism of control. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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