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首页> 外文期刊>Plant and Soil >Composition and activity of rhizosphere microbial communities associated with healthy and diseased greenhouse tomatoes
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Composition and activity of rhizosphere microbial communities associated with healthy and diseased greenhouse tomatoes

机译：健康和患病温室番茄相关的根际微生物群落的组成和活性

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The goal of this study was to investigate the structure and functional potential of microbial communities associated with healthy and diseased tomato rhizospheres.Composition changes in the bacterial communities inhabiting the rhizospheric soil and roots of tomato plants were detected using 454 pyrosequencing. Microbial functional diversity was investigated with BIOLOG technology.There were significant shifts in the microbial composition of diseased samples compared with healthy samples, which had the highest bacterial diversity. The predominant phylum in both diseased and healthy samples was Proteobacteria, which accounted for 35.7-97.4 % of species. The class Gammaproteobacteria was more abundant in healthy than in diseased samples, while the Alphaproteobacteria and Betaproteobacteria were more abundant in diseased samples. The proportions of pathogenic Ralstonia solanacearum and Actinobacteria species were also elevated in diseased samples. The proportions of the various bacterial populations showed a similar trend both in rhizosphere soil and plant roots in diseased versus disease-free samples, indicating that pathogen infection altered the composition of bacterial communities in both plant and soil samples. In terms of microbial activity, functional diversity was suppressed in diseased soil samples. Soil enzyme activity, including urease, alkaline phosphatase and catalase activity, also declined.This is the first report that provides evidence that R. solanacearum infection elicits shifts in the composition and functional potential of microbial communities in a continuous-cropping tomato operation
机译：本研究的目的是研究与健康和患病的番茄根际相关的微生物群落的结构和功能潜力。使用454焦磷酸测序技术检测了番茄根际土壤和根系中细菌群落的组成变化。用BIOLOG技术研究了微生物的功能多样性，患病样品的微生物组成与健康样品相比有显着变化，而健康样品的细菌多样性最高。在患病和健康样品中主要的门是Proteobacteria，占物种的35.7-97.4％。健康的丙种变形杆菌比患病的样本更为丰富，而患病的样本中的阿尔法变形杆菌和β变形杆菌更为丰富。在患病样品中，致病性青枯雷尔氏菌和放线菌的比例也升高。在患病和无病样品中，根际土壤和植物根中各种细菌种群的比例都显示出相似的趋势，这表明病原体感染改变了植物和土壤样品中细菌群落的组成。在微生物活性方面，患病土壤样品的功能多样性受到抑制。土壤酶活性（包括脲酶，碱性磷酸酶和过氧化氢酶活性）也有所下降。这是第一份报告，证明青枯菌感染在连续种植番茄的操作中引起微生物群落组成和功能潜力的转变

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