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首页> 外文期刊>Scientific reports. >The effect of combined application of Streptomyces rubrogriseus HDZ-9-47 with soil biofumigation on soil microbial and nematode communities
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The effect of combined application of Streptomyces rubrogriseus HDZ-9-47 with soil biofumigation on soil microbial and nematode communities

机译：链霉菌杂草HDZ-9-47与土壤微生物和线虫社区土壤生物造成的施用效果

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Meloidogyne incognita causes significant damage to many different crops. Previous studies showed that Streptomyces rubrogriseus HDZ-9-47 is a promising biocontrol agent. Combining it with biofumigation improved its efficacy against M. incognita. In the present study, the reason for the improved efficacy of the combination was investigated by analyzing its impact on both the soil microbial and the nematode communities in the field. The results showed that the combined application reduced root galls by 41% and its control efficacy was greater than each treatment alone. Cultivation-based analyses showed that the combination treatment affected the soil microbial community. Actinomycetes and bacterial densities were negatively correlated with the root knot score. In contrast, the fungal densities were positively correlated with the root knot score. Denaturing gradient gel electrophoresis (DGGE) results showed that the combination of S. rubrogriseus HDZ-9-47 and biofumigation enriched beneficial microbes and reduced certain soil-borne fungal phytopathogens, thereby enhancing the efficacies of both S. rubrogriseus HDZ-9-47 and biofumigation against M. incognita. And HDZ-9-47 could colonize in soil. The total abundance of nematode and plant parasites, the ratio of soil fungivore nematode to fungivore plus bacterivore nematode, and the nematode diversity indices all decreased with the combination treatment. Overall, the results of this study demonstrate that combined application of HDZ-9-47 with biofumigation was a useful and effective approach to suppress M. incognita by manipulating soil microbial communities in field.
机译：Meloidogyne Incognita对许多不同作物造成重大损害。之前的研究表明，Streptomyces rubrogriseus HDZ-9-47是一种有前途的生物控制剂。将其与Biofunigation结合起来改善了对M. Incognita的功效。在本研究中，通过分析其对土壤微生物和线虫群落的影响，研究了该组合的改善效能的原因。结果表明，组合施用减少41％的根胆汁，其对照功效仅大于单独治疗。基于培养的分析表明，组合治疗影响了土壤微生物群落。放线菌和细菌密度与根结分数负相关。相比之下，真菌密度与根结得分正相关。变性梯度凝胶电泳（DGGE）结果表明，S. rubrogriseus HDZ-9-47和生物萌射的组合富含有益微生物，并减少了某些土壤传播的真菌植物病变，从而提高了S. rubrogriseus HDZ-9-47的效果Biofumation对抗M. Incognita。和HDZ-9-47可以在土壤中进行殖民。线虫和植物寄生虫的总丰富，土壤功能性导线与菌和烟草线虫的比例，以及线虫多样性指数随着组合治疗而降低。总体而言，本研究的结果表明HDZ-9-47与Biofumation的合并应用是通过操纵土壤微生物群落来抑制M.Inmognita的有用而有效的方法。

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