期刊
JOURNAL OF BIOTECHNOLOGY
卷 140, 期 1-2, 页码 59-67出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jbiotec.2008.12.003
关键词
Metabolome; Proteome; Xanthomonas campestris pv. campestris; Plant extract; Pathogenicity
资金
- Federal Ministry of Education and Research
Xanthomonas campestris pathovar campestris (Xcc) is a plant pathogenic bacterium and as such has to adapt to a variety of environments. During the course of disease, Xcc colonizes the Surface of its host, infects the xylem in the early stages, and develops a fully saprophytic life-style, aided by secreted degradative enzymes, in the late stages. To get some insight into this complex regulation, Xcc was cultivated in the presence of low molecular weight host plant extract (<10 kDa). From this experiments it could be observed, that malate and Sucrose are taken LIP preferably in such an environment. Furthermore, it was demonstrated, that the plant extract has a negative effect on the gene expression of the hrp-gene cluster, although the activator hrpG was induced. Also, the secretion of degradative enzymes was shown to be upregulated. These observations indicate, that a low molecular weight plant extract (<10 kDa) is a sufficient signal to regulate metabolic pathways and the secretion of enzymes relevant for the development of virulence in Xanthomonas, but has a negative effect oil the expression of genes involved in type-III secretion, (C) 2009 Elsevier B.V. All rights reserved.
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