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首页> 外文期刊>Biocontrol Science and Technology >Microbial interference ameliorates essential oil yield and diminishes root-knot infestation in sweet basil under field conditions
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Microbial interference ameliorates essential oil yield and diminishes root-knot infestation in sweet basil under field conditions

机译：在田间条件下，微生物干扰改善了甜罗勒的精油产量并减少了根结侵扰

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摘要

Despite the vast exploration of bioinoculants for disease resistance and crop yield enhancement, knowledge about their impact on quality and quantity of essential oil as well as induction of antioxidant is scarce, especially in medicinal and aromatic crops. In the present two-year field experimentation, a subset of Bacillus spp., namely Bacillus flexus, B. subtilis, B. megaterium and B. aryabhattai, was evaluated against the most devastating root-knot nematode, Meloidogyne incognita (Kofoid and White) Chitwood infestation and essential oil yield enhancement in Ocimum basilicum var. CIM-Soumya (Sweet basil). The plants treated with B. subtilis showed significant (P 0.05) enhancement in fresh biomass (42%), essential oil content (121%), nutrient uptake (83%) and reduced root-knot infestation (54%) as compared to untreated control. The defence afforded by bioinoculants was observed based on augmentation of the phenolic (97%), flavonoid (93%), free radical scavenging activity (34%) and total antioxidant (33%) in Bacillus-treated infected plants as compared to untreated infected plants. The higher concentration of essential oil constituents, namely linalool (54%) and methyl chavicol (33%), was also recorded in same treatment. An increase in essential oil yield was reflected by induction of antioxidant machinery. The present study for the first time delineates nematicidal potentials of B. flexus and B. aryabhattai. Altogether these findings suggest that exploitation of bioinoculants could be helpful for effective management of the root-knot nematode infestation along with higher qualitative and quantitative essential oil yield with augmented antioxidants in sweet basil.
机译：尽管为抑制疾病和提高农作物产量广泛探索了生物杀菌剂，但对于其对精油的质量和数量以及抗氧化剂的诱导作用的了解仍然很少，尤其是在药用和芳香性作物中。在目前的两年实地实验中，针对最具破坏力的根结线虫线虫Meloidogyne incognita（Kofoid和White），评估了芽孢杆菌属的一个亚种，即弯曲芽孢杆菌，枯草芽孢杆菌，巨大芽孢杆菌和阿里阿巴泰芽孢杆菌。 Ocimum basilicum var中的奇特伍德出没和精油增产。 CIM-Soumya（甜罗勒）。与之相比，用枯草芽孢杆菌处理的植物显示出新鲜生物量（42％），精油含量（121％），养分吸收（83％）和根结病侵害（54％）显着（P <0.05）增强。未经处理的对照。与未经处理的被感染植物相比，经芽孢杆菌处理的被感染植物中酚类化合物（97％），类黄酮（93％），自由基清除活性（34％）和总抗氧化剂（33％）的增加可观察到生物防御剂提供的防御植物。在相同的处理中，也记录了较高浓度的精油成分，即芳樟醇（54％）和甲基查韦醇（33％）。诱导抗氧化剂机制可以反映出精油产量的增加。本研究首次描述了弯曲双歧杆菌和aryabhattai的杀线虫潜力。总的来说，这些发现表明，利用生物育种剂可以有效处理根结线虫侵染，并通过在甜罗勒中增加抗氧化剂来提高定性和定量的精油产量。

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