数字农科院2.0

Alpha Beta-Dehydrocurvularin Isolated From The Fungus Aspergillus Welwitschiae Effectively Inhibited The Behaviour And Development Of The Root-Knot Nematode Meloidogyne Graminicola In Rice Roots

文献类型： 外文期刊

作者： Xiang, C; Liu, Y; Liu, SM; Huang, YF; Kong, LA; Peng, H; Liu, MY; Liu, J; Peng, DL; Huang, WK

作者机构：

关键词： Meloidogyne Graminicola; Alpha Beta-Dehydrocurvularin; Nematicidal Activity; Attractiveness; Development; Behaviour

期刊名称： BMC MICROBIOLOGY

ISSN： 1471-2180

年卷期： 2020 年 20 卷 1 期

页码：

收录情况： JCR（2021版）

摘要： BackgroundThe root-knot nematode Meloidogyne graminicola has become a serious threat to rice production as a result of the cultivation changes from transplanting to direct seeding. The nematicidal activity of Aspergillus welwitschiae have been investigated in vitro, and the disease control efficacy of the active compound has been evaluated under greenhouse and field conditions.ResultsThe active compound alpha beta -dehydrocurvularin (alpha beta -DC), isolated by nematicidal assay-directed fractionation, showed significant nematicidal activity against M. graminicola, with a median lethal concentration (LC50) value of 122.2 mu gmL(-1). alpha beta -DC effectively decreased the attraction of rice roots to nematodes and the infection of nematodes and also suppressed the development of nematodes under greenhouse conditions. Moreover, alpha beta -DC efficiently reduced the root gall index under field conditions.ConclusionsTo our knowledge, this is the first report to describe the nematicidal activity of alpha beta -DC against M. graminicola. The results obtained under greenhouse and field conditions provide a basis for developing commercial formulations from alpha beta -DC to control M. graminicola in the future.

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