Herbicidal secondary metabolites from Bacillus velezensis JTB8-2 against Orobanche aegyptiaca
文献类型： 外文期刊
作者： He, Wei 1 ; Li, Yan 3 ; Luo, Wenfang 2 ; Zhou, Junhui 2 ; Zhao, Sifeng 1 ; Xu, Jianjun 2 ;
作者机构： 1.Shihezi Univ, Xinjiang Prod & Construct Corps, Agr Coll,Key Lab Special Fruits & Vegetables Cult, Key Lab,Univ Xinjiang Uygur Autonomous Reg Oasis, Shihezi 832003, Peoples R China
2.Xinjiang Acad Agr Sci, Inst Plant Protect, Minist Agr, Key Lab Integrated Pest Management Crops Northwes, Urumqi 830091, Xinjiang, Peoples R China
3.Chinese Acad Agr Sci, Inst Vegetables & Flowers, Beijing 100081, Peoples R China
关键词： Bacillus velezensis; Orobanche aegyptiaca; Secondary metabolites; Seed germination inhibitors; Microbial herbicide
期刊名称：AMB EXPRESS （ 影响因子：4.126； 五年影响因子：4.245 ）
ISSN： 2191-0855
年卷期： 2022 年 12 卷 1 期
页码：
收录情况： SCI
摘要： Egyptian broomrape (Orobanche aegyptiaca) is a parasitic plants that cause significant losses to important crops. The effective methods for controlling this weed are rare. Biological control could be one of the possible strategies to tackle these weeds efficiently. In this work, a bacteria strain Bacillus velezensis JTB8-2 was proven to possesse biological control functions against broomrapes in both pot and field experiments. Four secondary metabolites (1-4) were isolated from the B. velezensis JTB8-2 crude extracts, and all of them could inhibit the germination of O. aegyptiaca seeds at concentrations from 0.5 mM to 4 mM. Their structures were further elucidated by Nuclear Magnetic Resonance (NMR) and Mass Spectrometry (MS) analysis. Among the isolated compounds, 1 and 2 exhibited the strongest herbicidal activity with 100% inhibition rate against the germination of O. aegyptiaca seeds at 4 mM, and thus had great potential in the development of new herbicidal products to control O. aegyptiaca in the future.
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