Laboratório de Crescimento e Desenvolvimento de Plantas, Setor de Fisiologia Vegetal, Universidade Federal de Lavras, Lavras, Minas Gerais CEP 37200-000, Brazil.
Laboratório de Citogenética, Universidade Federal de Lavras, Lavras, Minas Gerais CEP 37200-000, Brazil.
J Agric Food Chem. 2024 Mar 27;72(12):6289-6301. doi: 10.1021/acs.jafc.3c08566. Epub 2024 Mar 19.
The indiscriminate use of synthetic herbicides reduces its effectiveness. Bioherbicides produced with metabolites emerge as an alternative to managing weeds. We aimed to analyze the phytotoxic potential of the essential oil of (EOVA) and the α-bisabolol molecule, its main component. We evaluated the effects of EOVA and α-bisabolol at different concentrations on the germination, growth, antioxidant metabolism, and photosynthesis of different species. EOVA and α-bisabolol showed promising phytotoxic effects on the germination and initial growth of the weed , inhibiting the activity of the antioxidant enzymes and increasing lipid peroxidation. α-Bisabolol reduced the weed seedling growth by inducing oxidative stress, which suggests a greater role in postemergence. Moreover, in the weed postemergence, both EOVA and α-bisabolol caused damage in the shoots, reduced the chlorophyll content, and increased lipid peroxidation besides reducing photosynthesis in . Overall, we suggest the promising action of α-bisabolol and EOVA as bioherbicides for weed control.
滥用人造除草剂会降低其效果。利用代谢物生产的生物除草剂成为管理杂草的一种替代方法。我们旨在分析 （EOVA）精油及其主要成分 α- 双醇的植物毒性潜力。我们评估了 EOVA 和 α-双醇在不同浓度下对不同物种的发芽、生长、抗氧化代谢和光合作用的影响。EOVA 和 α-双醇对杂草种子的发芽和初期生长表现出有希望的植物毒性作用，抑制了抗氧化酶的活性并增加了脂质过氧化。α-双醇通过诱导氧化应激抑制杂草幼苗生长，这表明其在芽后期的作用更大。此外，在杂草芽后期，EOVA 和 α-双醇都会对茎叶造成伤害，降低叶绿素含量，增加脂质过氧化，同时降低 的光合作用。总的来说，我们认为 α-双醇和 EOVA 作为生物除草剂控制杂草具有很大的应用潜力。
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