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http://dx.doi.org/10.5423/PPJ.2004.20.3.172

Rhizobacteria-mediated Induced Systemic Resistance in Cucumber Plants against Anthracnose Disease Caused by Colletotrichum orbiculare  

Jeun, Yong-Chull (Department of Plant Resource Science, the Research Institute for Subtropical Agriculture and Biotechnology, Cheju National University)
Lee, Yun-Jeong (Plant Nutrition Division, National Institute of Agricultural Science and Technology, RDA)
Bae, Yeoung-Seuk (Plant Pathology Division, National Institute of Agricultural Science and Technology, RDA)
Publication Information
The Plant Pathology Journal / v.20, no.3, 2004 , pp. 172-176 More about this Journal
Abstract
Bacterial isolates TRL2-3 and TRK2-2 showing anti-fungal activity in vitro test against some plant pathogens were identified as Pseudomonas putida and Micrococcus luteus, respectively. Pre-treatment with both bacterial isolates at the concentration 1.0$\times$ $10^7$ and $10^6$cfu/ml in the rhizosphere could trigger induced systemic resistance in the aerial part of cucumber plants against anthracnose caused by Colletotrichum orbiculare. However, the pre-treatment with the higher concentration at 1.0 $\times$ $10^8$ cfu/ml of both isolates could not induce resistance after challenge inoculation with C. orbiculare. As a positive control, the treatment with DL-3 amino butyric acid caused a remarkable reduction of disease severity whereas the lesions on the leaves of untreated plants developed apparently after the fungal inoculation. From these results, it was recomended that disease control using both bacterial isolates inducing systemic resistance in the field where chemical application is forbid.
Keywords
Antifungal activity; Colletotrichum orbiculare; Cucumber; Induced systemic resistance; Plant growth promoting rhizobacteria (PGPR);
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