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Open AccessArticle

The Endochitinase of Clonostachysrosea Expression in Bacillus amyloliquefaciens Enhances the Botrytis cinerea Resistance of Tomato

1
College of Life Sciences, Northeast Agricultural University, Harbin 150030, China
2
Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Northeast Region), Ministry of Agriculture/Northeast Agricultural University, Harbin 150030, China
3
College of Sciences, Northeast Agricultural University, Harbin 150030, China
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Int. J. Mol. Sci. 2018, 19(8), 2221; https://doi.org/10.3390/ijms19082221
Received: 16 June 2018 / Revised: 19 July 2018 / Accepted: 24 July 2018 / Published: 30 July 2018
(This article belongs to the Section Molecular Plant Sciences)
To investigate whether the ech42 gene in Clonostachysrosea can improve the biocontrol efficacy of Bacillus amyloliquefaciens and its molecular mechanism. Compared to the wild type, the B. amyloliquefaciens transformed with the ech42 gene exhibited higher chitinase activity. The B. amyloliquefaciens-ech42 also showed significantly higher biocontrol efficiency compared to Botrytiscinerea when tomato plants were pre-treated with B. amyloliquefaciens-ech42. No significant difference in biocontrol efficiency was observed between the wild type and B.amyloliquefaciens-ech42 when tomato plants were first infected by Botrytiscinerea. In addition, the activity of the defense-related enzyme polyphenol oxidase, but not superoxide dismutase, was significantly higher in B. amyloliquefaciens-ech42 than in the wild type. The ech42 enhances the biocontrol efficiency of B.amyloliquefaciens by increasing the capacity of preventative/curative effects in plants, rather than by killing the pathogens. View Full-Text
Keywords: Bacillus amyloliquefaciens; chitinase; defense enzymes; biological control Bacillus amyloliquefaciens; chitinase; defense enzymes; biological control
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Zheng, Y.; Wang, X.; Liu, S.; Zhang, K.; Cai, Z.; Chen, X.; Zhang, Y.; Liu, J.; Wang, A. The Endochitinase of Clonostachysrosea Expression in Bacillus amyloliquefaciens Enhances the Botrytis cinerea Resistance of Tomato. Int. J. Mol. Sci. 2018, 19, 2221.

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