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Kim TY, Jang JY, Yu NH, Chi WJ, Bae CH, Yeo JH, Park AR, Hur JS, Park HW, Park JY, Park JH, Lee SK, Kim JC. Nematicidal activity of grammicin produced by Xylaria grammica KCTC 13121BP against Meloidogyne incognita. Pest Manag Sci 2018; 74:384-391. [PMID: 28851010 DOI: 10.1002/ps.4717] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Revised: 08/25/2017] [Accepted: 08/25/2017] [Indexed: 05/28/2023]
Abstract
BACKGROUND The endolichenic fungus Xylaria grammica KCTC 13121BP showed strong nematicidal activity against Meloidogyne incognita. This study aimed to identify the nematicidal metabolites and to evaluate the efficacy of the strain as a biocontrol agent under pot and field conditions. RESULTS Bioassay-guided fractionation and instrumental analyses led to grammicin being identified as the nematicidal metabolite. Because patulin is a mycotoxic isomer of grammicin and is known to have strong antibacterial and cytotoxic activities, several biological activities of the two compounds were compared. Grammicin showed strong second-stage juvenile killing and egg-hatching inhibitory effects, with a 50% effective concentration at 72 h (EC50/72 h ) of 15.9 µg/mL and a 50% effective concentration at 14 days (EC50/14 days ) of 5.87 µg/mL, respectively, whereas patulin was virtually inactive in both respects. Patulin was strongly active toward various phytopathogenic bacteria in vitro, whereas grammicin was weakly so. Patulin at the concentration range of 0.1-10 µg/mL also showed dose-dependent cytotoxicity toward the human first-trimester trophoblast cell line SW.71, whereas grammicin was not toxic toward this cell line. In pot and field experiments, a wettable powder-type formulation and fermentation broth filtrate of X. grammica KCTC 13121BP effectively suppressed the development of root-knot nematode disease on tomato and melon plants. CONCLUSION The results suggest that X. grammica and grammicin may have potential applications for control of root-knot nematode disease of various crops. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Tae Yoon Kim
- Division of Applied Bioscience and Biotechnology, Institute of Environmentally Friendly Agriculture, College of Agriculture and Life Sciences, Chonnam National University, Gwangju, Republic of Korea
| | - Ja Yeong Jang
- Division of Applied Bioscience and Biotechnology, Institute of Environmentally Friendly Agriculture, College of Agriculture and Life Sciences, Chonnam National University, Gwangju, Republic of Korea
| | - Nan Hee Yu
- Division of Applied Bioscience and Biotechnology, Institute of Environmentally Friendly Agriculture, College of Agriculture and Life Sciences, Chonnam National University, Gwangju, Republic of Korea
| | - Won Jae Chi
- Biological and Genetic Resources Assessment Division, National Institute of Biological Resources, Incheon, Republic of Korea
| | - Chang-Hwan Bae
- Biological and Genetic Resources Assessment Division, National Institute of Biological Resources, Incheon, Republic of Korea
| | - Joo Hong Yeo
- Biological and Genetic Resources Assessment Division, National Institute of Biological Resources, Incheon, Republic of Korea
| | - Ae Ran Park
- Division of Applied Bioscience and Biotechnology, Institute of Environmentally Friendly Agriculture, College of Agriculture and Life Sciences, Chonnam National University, Gwangju, Republic of Korea
| | - Jae-Seon Hur
- Korean Lichen Research Institute, Suncheon National University, Suncheon, Republic of Korea
| | - Hae Woong Park
- R&D Division, World Institute of Kimchi, Gwangju, Republic of Korea
| | - Ji-Yeon Park
- Laboratory of Animal Medicine, College of Veterinary Medicine and BK21 PLUS Project Team, Chonnam National University, Gwangju, Republic of Korea
| | - Jong-Hwan Park
- Laboratory of Animal Medicine, College of Veterinary Medicine and BK21 PLUS Project Team, Chonnam National University, Gwangju, Republic of Korea
| | - Sung Ki Lee
- Department of Obstetrics and Gynecology, College of Medicine, Konyang University, Daejeon, Republic of Korea
| | - Jin-Cheol Kim
- Division of Applied Bioscience and Biotechnology, Institute of Environmentally Friendly Agriculture, College of Agriculture and Life Sciences, Chonnam National University, Gwangju, Republic of Korea
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