文献类型：期刊文献

英文题名：Reduced Root Secretion of Valine in Rosa-Microbe Interaction Contributes to the Decreased Colonization of Pathogenic Agrobacterium tumefaciens

作者：Chen, Lin[1] Ma, Qinghua[1] Liu, Huihui[1] Bian, Lusen[1] Wang, Xinghong[1] Liu, Yunpeng[2]

第一作者：陈淋

通信作者：Liu, YP[1]

机构：[1]Chinese Acad Forestry, Expt Ctr Forestry North China, Beijing 102300, Peoples R China;[2]Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Key Lab Agr Microbial Resources Collect & Preserv, Minist Agr & Rural Affairs, Beijing 100081, Peoples R China

年份：2021

卷号：105

期号：3

起止页码：599-606

外文期刊名：PLANT DISEASE

收录：;Scopus(收录号：2-s2.0-85099557363);WOS:【SCI-EXPANDED(收录号:WOS:000663983700010)】；

基金：This work was supported by the Fundamental Research Funds for the Central Non-profit Research Institution of the Chinese Academy of Forestry (grant CAFYBB2017MA020) and National Natural Science Foundation of China (grants 31700548 and 31700571).

语种：英文

外文关键词：colonization; crown gall disease; root exudates; Rosa; valine

摘要：Root exudates play a critical role in root-microbe interactions. Agrobacterium tumefaciens causes crown gall disease in multiple plant species, but rose root exudate-mediated inhibition of Agrobacterium in the rhizosphere is poorly understood. In this study, the influence of preinoculation with beneficial bacteria or pathogens on root exudates and subsequent colonization by A. tumefaciens was investigated in a split-root system. We found that preinoculation of rose plants in a split-root system with Bacillus velezensis CLA178 or A. tumefaciens C58 inhibited subsequent colonization by C58. Root secretion of valine had positive effects on the chemotaxis, biofilm formation, colonization of C58, and crown gall disease severity, but valine secretion decreased significantly when Rosa multiflora plants were preinoculated with CLA178 or C58. These results indicated that rose plants reduced root secretion of valine in response to microbial colonization, thereby reducing the colonization of Agrobacterium colonization and disease severity. This study provides new insights into the root exudate-mediated interactions of rose plants, B. velezensis, and A. tumefaciens and proposes a potential way to control crown gall disease.