Microbial community composition is related to soil biological and chemical properties and bacterial wilt outbreak.
Microbial community composition is related to soil biological and chemical properties and bacterial wilt outbreak.
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DOI：
10.1038/s41598-017-00472-6
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发表时间：
2017-03-23
影响因子：
4.6
通讯作者：
Zhao X
中科院分区：
文献类型：
--
作者：
Wang R;Zhang H;Sun L;Qi G;Chen S;Zhao X
土壤微生物在植物生长和健康中起着重要作用。青枯病菌侵染土壤与健康土壤微生物的差异尚不清楚。通过Illumina-MiSeq序列分析发现，青枯病菌感染土壤和健康土壤的微生物组成和多样性存在差异。在不同的植物生长阶段，由于根系分泌物组成和土壤pH值的变化，土壤微生物群落也发生了变化。健康土壤中的有益微生物种类较多，包括芽孢杆菌属、土壤霉菌属、小单孢菌属、假诺卡氏菌属、枝顶孢菌属、溶杆菌属、中慢生根瘤菌属、微球孢菌属、枝顶孢菌属和毛壳菌属。与青枯病菌侵染土壤相比，健康土壤的过氧化氢酶、转化酶和脲酶活性以及土壤pH、速效磷和速效钾含量均显著增加。总之，土壤中有益微生物的丰度越高，土壤质量越好，植物生长越好，病害发生率越低，土壤养分含量、土壤酶活性和土壤pH值越高。
Soil microbes play important roles in plant growth and health. Little is known about the differences of soil microbes between healthy and bacterial wilt infected soils with Ralstonia solanacearum. By Illumina-MiSeq sequencing of 16S rRNA and 18S rRNA gene amplicons, we found the soil microbial composition and diversity were distinct between healthy and bacterial wilt infected soils. Soil microbial community varied at different plant growth stages due to changes of root exudates composition and soil pH. Healthy soils exhibited higher microbial diversity than the bacterial wilt infected soils. More abundant beneficial microbes including Bacillus, Agromyces, Micromonospora, Pseudonocardia, Acremonium, Lysobacter, Mesorhizobium, Microvirga, Bradyrhizobium, Acremonium and Chaetomium were found in the healthy soils rather than the bacterial wilt infected soils. Compared to bacterial wilt infected soils, the activities of catalase, invertase and urease, as well as soil pH, available phosphorous and potassium content, were all significantly increased in the healthy soils. In a conclusion, the higher abundance of beneficial microbes are positively related the higher soil quality, including better plant growth, lower disease incidence, and higher nutrient contents, soil enzyme activities and soil pH.