Control Effects of 3-(4-Hydroxyphenyl)-propionic Acid Isolated Xenorhabdus nematophila K1 against Phytophthora Blight and Anthracnose of Red Pepper

Research in Plant Disease 2013;19(3):208-215.
Published online September 30, 2013.

Xenorhabdus nematophila K1 대사물질 3-(4-hydroxyphenyl)-propionic acid의 고추 역병과 탄저병에 대한 방제 효과

천원수 ( Won Su Cheon ) , 김도연 ( Do Yeon Kim ) , 김용균 ( Yongg Yun Kim ) , 홍용표 ( Yong Pyo Hong ) , 이영근 ( Young Keun Yi )

Control Effects of 3-(4-Hydroxyphenyl)-propionic Acid Isolated Xenorhabdus nematophila K1 against Phytophthora Blight and Anthracnose of Red Pepper

Wonsu Cheon1, Doyeon Kim1, Yonggyun Kim1,2, Yong Pyo Hong3 and Youngkeun Yi1,2*

¹Department of Plant Medicine, Andong National University, Andong 760-749, Korea
²Institute of Agricultural Science and Technology, Andong National University, Andong 760-749, Korea
³Department of Applied Chemistry, Andong National University, Andong 760-749, Korea

Received: March 19, 2013 Revised: August 06, 2013 Accepted: August 12, 2013

Abstract

3-(4-Hydroxyphenyl)-propionic acid (HPP) is a bacterial metabolite synthesized and released by an entomopathogenic bacterium Xenorhabdus nematophila K1. In this study, the control efficacy of HPP was tested against Phytophthora blight and anthracnose of red pepper plants. HPP suppressed mycelial growth of Phytophthora blight and anthracnose pathogens. Under natural sunlight condition, HPP maintained the antifungal activity on the diseases for at least twenty five days. The antifungal activity was not decreased even in the condition of soil-water. It was proved that HPP was able to penetrate the roots and travel upward of the red pepper plants. When HPP suspension was applied to soil rhizosphere before transplanting the red pepper seedlings or was regularly sprayed to the foliage of the plants with ten days interval, it resulted in significant reduction of the disease occurrences (Phytophthora blight and anthracnose) without any phytotoxicity. These results suggested that HPP can be developed to a systemic agrochemical against Phytophthora blight and anthracnose of red pepper plants.

Key Words: Anthracnose, Disease control, 3-, 4-Hydroxyphenyl-propionic acid, Phytophthora blight, Red pepper plants