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05.05.2017 | Original Article

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

verfasst von: Jianfeng Huang, Zhong Wei, Jie Hu, Chunlan Yang, Yi’an Gu, Xinlan Mei, Qirong Shen, Yangchun Xu, Kashif Riaz

Erschienen in: BioControl | Ausgabe 4/2017

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Abstract

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.

Vorheriger Artikel Competition is the mechanism of biocontrol of brown rot in stone fruit by Penicillium frequentans

Nächster Artikel Erratum to: Trends in the classical biological control of insect pests by insects: an update of the BIOCAT database

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Titel: Chryseobacterium nankingense sp. nov. WR21 effectively suppresses Ralstonia solanacearum growth via intensive root exudates competition
verfasst von: Jianfeng Huang
Zhong Wei
Jie Hu
Chunlan Yang
Yi’an Gu
Xinlan Mei
Qirong Shen
Yangchun Xu
Kashif Riaz
Publikationsdatum: 05.05.2017
Verlag: Springer Netherlands
Erschienen in: BioControl / Ausgabe 4/2017
Print ISSN: 1386-6141
Elektronische ISSN: 1573-8248
DOI: https://doi.org/10.1007/s10526-017-9812-1

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