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http://dx.doi.org/10.5423/PPJ.2004.20.3.177

In Vitro Anti-Oomycete Activity and In Vivo Control Efficacy of Phenylacetic Acid Against Phytophthora capsici  

Lee, Jung-Yeop (Department of Medicinal Chemistry, College of Pharmacy, University of Michigan, Division of Bioscience and Technology, College of Life and Environmental Sciences, Korea University)
Kim, Hye-Sook (Division of Bioscience and Technology, College of Life and Environmental Sciences, Korea University)
Kim, Ki-Deok (Division of Bioscience and Technology, College of Life and Environmental Sciences, Korea University)
Hwang, Byung-Kook (Division of Bioscience and Technology, College of Life and Environmental Sciences, Korea University)
Publication Information
The Plant Pathology Journal / v.20, no.3, 2004 , pp. 177-183 More about this Journal
Abstract
Phenylacetic acid (PAA) was evaluated for in vitro anti-oomycete activity and in vivo control efficacy against Phytophthora capsici. Microscopic observation revealed that the high level of anti-oomycete activity of PAA (10 $\mu\textrm{g}$/ml) against P. capsici is mainly due to the lytic effect on zoospores. Zoospore lysis began in the presence of 5 u$\mu\textrm{g}$/ml of PAA and most of the zoospores were collapsed at 10 $\mu\textrm{g}$/ml. PAA showed inhibitory activity against the zoospore germination and hyphal growth of P. capsici at the concentration of 50 $\mu\textrm{g}$/ml. In the glasshouse, the protective effect of PAA against Phytophthora blight was high on pepper plants when treated just before inoculation with P. capsici. In the artificially infested field, protection of pepper plants against the Phyto-phthora epidemic was achieved at a considerable level by PAA treatment.
Keywords
Anti-oomycete activity; Phenylacetic acid; Phyto- phthora blight; Phytophthora capsic;
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