A system to study the expression of phytopathogenic genes encoded byBurkholderia glumae

文献类型： 外文期刊

第一作者： Mirghasempour, A.

作者： Mirghasempour, A.;Hou, Y.;Huang, S.;Glick, B. R.

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关键词： Rice; Gene expression; Burkholderia glumae; Root exudates; Virulence genes

期刊名称：ARCHIVES OF MICROBIOLOGY （ 影响因子：2.552； 五年影响因子：2.475 ）

ISSN： 0302-8933

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收录情况： SCI

摘要： Rice is often infected by bacterial panicle blight disease caused byBurkholderia glumae. Since most studies have assessed the transcriptome of the plant when it is exposed to bacteria, the gene expression of the phytopathogenic bacteria have not been well elaborated during the infection process or in the host cell. Recently, a few researches were conducted to evaluate the in vivo transcriptome of bacteria during the infective process. Most bacterial cells do not express genes involved in pathogenicity in culture medium making it difficult to investigate gene expression of bacterial cells in plant cells. Here, we sought a simulated patho-system that would allow bacterial cells to express their pathogenic genes. Thus, rice root exudates (RE) and bacterialN-acyl homoserine lactone (AHL) were used and their effects on bacterial gene expression were assessed. Transcription patterns ofB. glumaevirulence determinants showed that enrichment medium (LB + RE + C8-HSL) could significantly induce virulence factor genes compared with Luria Bertani (LB; control) medium. The data indicate that the artificial environment is similar to the real patho-system, and that this induced maximum relevant gene expression. In this model system, bacterial gene expression changes are traceable in the infection process. Bacterial cells exposed to either an artificial environment or LB + RE + C8-HSL behaved similarly to the natural environment in situ.

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