Chryseobacterium nankingense sp nov WR21 effectively suppresses Ralstonia solanacearum growth via intensive root exudates competition

文献类型： 外文期刊

第一作者： Wei, Zhong

作者： Wei, Zhong;Hu, Jie;Yang, Chunlan;Gu, Yi'an;Mei, Xinlan;Shen, Qirong;Xu, Yangchun;Huang, Jianfeng;Riaz, Kashif

作者机构：

关键词： Ralstonia solanacearum;Bacterial wilt;Resource competition;Root exudates;Biocontrol

期刊名称：BIOCONTROL （ 影响因子：3.571； 五年影响因子：3.243 ）

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年卷期：

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收录情况： SCI

摘要： Previous studies demonstrated that the Chryseobacterium sp. WR21 could effectively control the bacterial wilt disease caused by Ralstonia solanacearum through effective root colonization. The strain WR21 exhibited a low level of DNA homology with Chryseobacterium strains DSM 15235(T) (24.1%), DSM 17724(T) (24.8%), and DSM 18014(T) (10.4%), suggesting that WR21 may represent a novel species, for which the name Chryseobacterium nankingense sp. nov. is proposed. The in vitro competition experiments with strain WR21 indicated it significantly inhibited growth of the pathogen in co-culture with six of nine tested nutrients (e.g. root exudates) that could be utilized by strain WR21 and R. solanacearum. Similar trends were observed in co-culturing experiments using tissue exudates of tomato. A positive relationship (r = 0.785) was noticed between the differences in the average growth rate of both strains and the disease suppression effects. In conclusion, Chryseobacterium nankingense sp. nov. WR21 exhibits antagonism through nutrient competition that might be used for achieving biocontrol of Ralstonia solanacearum induced wilts.

分类号： S476

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