Biocontrol of Late Blight Disease (Phytophthora capsici) of Pepper and the Plant Growth Promotion by Paenibacillus ehimensis KWN38. Issue 6 (15th November 2013)

• Record Type: Journal Article
• Authors: Naing, Kyaw W.; Anees, Muhammad; Nguyen, Xuan H.; Lee, Yong S.; Jeon, Seung W.; Kim, Sang J.; Kim, Myung H.; Kim, Kil Y.
• Is Part Of: Journal of phytopathology. Volume 162:Issue 6(2014:Jun.)
• Page Start: 367
• Page End: 376
• Publication Date: 2013-11-15
• Subjects: Plant diseases -- Periodicals; 632
• DOI: 10.1111/jph.12198
• Languages: English
• ISSNs: 0931-1785

Abstract

<abstract abstract-type="main" id="jph12198-abs-0001"> <title>Abstract</title> <p>For field application of a bacterial strain used to control <italic>Phythophthora capsici</italic>, we will need a biologically and economically efficient carrier medium. The known antagonist <italic>Paenibacillus ehimensis</italic>KWN38 was grown in a grass medium where it showed high antifungal and lytic enzyme activities. To demonstrate the potential of <italic>P. ehimensis</italic>KWN38 for biocontrol of late blight disease in pepper, pot trials were conducted by treating the 1‐month‐old plants with water (W), a selected grass medium (G3), G plus <italic>P. ehimensis</italic>KWN38 inoculation (G3P) or synthetic fungicide (F). The shoot dry weight in G3P was higher than that in W and F treatments at 15 days after zoospore infection (DZI). The root dry weight in G3P was also higher than that in W. The root mortality of G3 and W increased over 58 and 80% at 15 DZI, and some plants in those treatments wilted due to the failure of root physiology. The plants in G3P and F survived well because of their better root health conditions. Soil cellulase activity of G3P was consistently higher than that of W and F at earlier observation times (0, 2 and 6 DZI). The root <italic>β</italic>‐1, 3‐glucanase activity of G3P promptly increased to maximum shortly after zoospore infection and reached the maximum value of 51.12 unit g<sup>−1</sup> of fresh weight at 2 DZI. All these results indicate that inoculation of <italic>P. ehimensis</italic>KWN38 to the root zone of potted pepper plants increases plant growth, root and soil enzyme activities and alleviates the root death caused by infection with <italic>P. capsici</italic> zoospores.</p> </abstract>