Biocontrol activity and induction of systemic resistance in pepper by compost water extracts against Phytophthora capsici

Phytopathology
Mee Kyung SangKi Deok Kim

Abstract

We investigated the effects of water extracts of composts (CWE) from commercial compost facilities for controlling root and foliar infection of pepper plants by Phytophthora capsici. Among 47 CWE tested, CWE from composts Iljuk-3, Iljuk-7, Shinong-8, and Shinong-9 significantly (P < 0.05) inhibited zoospore germination, germ tube elongation, mycelial growth, and population of P. capsici. All selected CWE significantly (P < 0.05) reduced the disease incidence and severity in the seedling and plant assays compared with the controls. However, there were no significant differences in zoospore germination, disease incidence, and disease severity between treatments of untreated, autoclaved, and filtered CWE. In addition, CWE significantly (P < 0.05) suppressed leaf infection of P. capsici through induced systemic resistance (ISR) in plants root-drenched with CWE. The tested CWE enhanced the expression of the pathogenesis-related genes, CABPR1, CABGLU, CAChi2, CaPR-4, CAPO1, or CaPR-10 as well as beta-1,3-glucanase, chitinase, and peroxidase activities, which resulted in enhanced plant defense against P. capsici in pepper plants. Moreover, the CWE enhanced the chemical and structural defenses of the plants, including H(2)O(2) generati...Continue Reading

References

Sep 2, 1999·Analytical Biochemistry·C GayJ M Gebicki
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Dec 1, 1999·Plant Disease·Jean Beagle Ristaino, Stephen A Johnston

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Citations

Mar 5, 2013·World Journal of Microbiology & Biotechnology·Francisco MarínMaría J Navarro
May 5, 2017·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Patrick HillChristopher N Boddy
Jun 28, 2018·Environmental Science and Pollution Research International·Oumar DoungousNjukeng Jetro Nkengafac
Nov 1, 2012·Plant Disease·Leah L GrankeMary K Hausbeck

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