Chryseobacterium nankingense sp nov WR21 effectively suppresses Ralstonia solanacearum growth via intensive root exudates competition
Chryseobacterium nankingense sp nov WR21 effectively suppresses Ralstonia solanacearum growth via intensive root exudates competition
复制标题
金黄杆菌 nankingense sp nov WR21 通过强烈的根系分泌物竞争有效抑制青枯菌生长
DOI：
10.1007/s10526-017-9812-1
复制
发表时间：
2017
期刊：
影响因子：
2.5
通讯作者：
Riaz Kashif
中科院分区：
文献类型：
--
作者：
Huang Jianfeng;Wei Zhong;Hu Jie;Yang Chunlan;Gu Yi'an;Mei Xinlan;Shen Qirong;Xu Yangchun;Riaz Kashif
以往的研究表明，金黄杆菌属（Chryseobacterium sp.）WR21通过有效的根系定殖，能有效控制青枯病。WR21与金黄杆菌DSM 15235T（24.1%）、DSM 17724T（24.8%）和DSM 18014T（10.4%）的DNA同源性较低，提示WR21可能代表一个新种，命名为南京金黄杆菌（Chryseobacterium nankingensep.）十一是建议。与菌株WR 21的体外竞争实验表明，在与菌株WR 21和R.青枯菌属在番茄组织分泌物的共培养实验中也观察到类似的趋势。两个菌株的平均生长速率的差异与病害抑制效果之间存在正相关（r = 0.785）。综上所述，南京黄杆菌属（Chryseobacterium nankingensasp.）nov.WR21通过营养竞争表现出拮抗作用，可用于青枯菌枯萎病的生防。
Previous studies demonstrated that theChryseobacteriumsp. WR21 could effectively control the bacterial wilt disease caused byRalstonia solanacearumthrough effective root colonization. The strain WR21 exhibited a low level of DNA homology withChryseobacteriumstrains DSM 15235T(24.1%), DSM 17724T(24.8%), and DSM 18014T(10.4%), suggesting that WR21 may represent a novel species, for which the nameChryseobacterium nankingensesp. 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 andR. 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 nankingensesp. nov. WR21 exhibits antagonism through nutrient competition that might be used for achieving biocontrol ofRalstonia solanacearuminduced wilts.