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

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...

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Bibliographic Details
Published inJournal of phytopathology Vol. 166; no. 5; pp. 346 - 354
Main Authors Zhao, Peibao, Ren, Aizhi, Dong, Ping, Sheng, Yinsheng, Chang, Xue, Zhang, Xiusheng
Format Journal Article
LanguageEnglish
Published Berlin Wiley Subscription Services, Inc 01.05.2018
Subjects
Ammonia
Antiinfectives and antibacterials
Botrytis cinerea
Catalase
Enzymes
Foliar applications
Grey mold
induced systemic resistance
Malondialdehyde
Peroxidase
Phalaenopsis
Phenylalanine
Plant growth
Polyphenol oxidase
Superoxide dismutase
Trichoderma pseudokoningii
trichokonins
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Summary: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.
ISSN:0931-1785
1439-0434
DOI:10.1111/jph.12692