Systemic Resistance and Expression of the Pathogenesis-Related Genes Mediated by the Plant Growth-Promoting Rhizobacterium Bacillus amyloliquefaciens EXTN-1 Against Anthracnose Disease in Cucumber.
- Author:
Kyungseok PARK
;
Il Pyung AHN
;
Choong Hoe KIM
- Publication Type:Original Article
- Keywords:
Biological control;
Induced systemic resistance(ISR);
Pathogenesis-related proteins;
Rhizobacteria
- MeSH:
Bacillus*;
Colletotrichum;
Gene Expression;
Plants*;
Salicylic Acid;
Tobacco
- From:Mycobiology
2001;29(1):48-53
- CountryRepublic of Korea
- Language:English
-
Abstract:
Plants have the ability to acquire an enhanced level of resistance to pathogen attack after being exposed to specific biotic stimuli. To obtain plant growth-promoting rhizobacteria inducing resistance against cucumber anthracnose by Colletotrichum orbiculare, more than 800 strains of rhizobacteria were screened in the greenhouse. Among these strains, Bacillus amyloliquefaciens solate EXTN-1 showed significant disease control efficacy on the plants. Induction of pathogenesis-related(PR-la) gene expression by EXTN-1 was assessed using tobacco plants transformed with PR-1a::beta-glucuronidase (GUS) construct. GUS activities of tobacco treated with EXTN-1 and salicylic acid-treated transgenic tobacco were significantly higher than those of tobacco plants with other treatments. Gene expression analyses indicated that EXTN-1 induces the accumulation of defense-related genes of tobacco. The results showed that some defense genes are expressed by the treatment with EXTN-1 suggesting the similar resistance mechanism by salicylic acid.
