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The phosphotransferase system gene ptsH plays an important role in MnSOD production, biofilm formation, swarming motility, and root colonization in Bacillus cereus 905

文献类型： 外文期刊

作者： Gao, Tantan 1 ; Ding, Mingzheng 2 ; Yang, Ching-Hong 3 ; Fan, Haiyan 2 ; Chai, Yunrong 4 ; Li, Yan 2 ;

作者机构： 1.Chinese Acad Agr Sci, State Key Lab Biol Plant Dis & Insect Pests, Inst Plant Protect, Beijing 100193, Peoples R China

2.China Agr Univ, Dept Plant Pathol, Coll Plant Protect, Beijing 100193, Peoples R China

3.Univ Wisconsin, Dept Biol Sci, Milwaukee, WI 53211 USA

4.Northeastern Univ, Dept Biol, 360 Huntington Ave, Boston, MA 02215 USA

关键词： Bacillus cereus; ptsH; Superoxide dismutase; Biofilm formation; Swarming motility; Root colonization

期刊名称：RESEARCH IN MICROBIOLOGY （ 影响因子：3.992； 五年影响因子：4.061 ）

ISSN： 0923-2508

年卷期： 2019 年 170 卷 2 期

页码：

收录情况： SCI

摘要： The rhizosphere bacterium Bacillus cereus 905 is capable of promoting plant growth through effective colonization on plant roots. The sodA2-encoding manganese-containing superoxide dismutase (MnSOD2) is important for survival of B. cereus 905 in the wheat rhizosphere. However, the genes involved in regulating sodA2 expression and the mechanisms of rhizosphere colonization of B. cereus 905 are not well elucidated. In this study, we found that the deletion of the ptsH gene, which encodes the histidine-phosphorylatable protein (HPr), a component of the phospho transferase system (PTS), causes a decrease of about 60% in the MnSOD2 expression. Evidences indicate that the ptsH dramatically influences resistance to oxidative stress, glucose uptake, as well as biofilm formation and swarming motility of B. cereus 905. Root colonization assay demonstrated that AptsH is defective in colonizing wheat roots, while complementation of the sodA2 gene could partially restore the ability in utilization of arabinose, a non-PTS sugar, and root colonization caused by the loss of the ptsH gene. In toto, based on the current findings, we propose that PtsH contributes to root colonization of B. cereus 905 through multiple indistinct mechanisms, involving PTS and uptake of PTS-sugars, up-regulation of MnSOD2 production, and promotion of biofilm formation and swarming motility. (C) 2018 Institut Pasteur. Published by Elsevier Masson SAS. All rights reserved.

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