Bacteria establish an aqueous living space in plants crucial for virulence [electronic resource]

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Tác giả:

Ngôn ngữ: eng

Ký hiệu phân loại: 579.2 *Viruses and subviral organisms

Thông tin xuất bản: Washington, D.C. : Oak Ridge, Tenn. : United States. Dept. of Energy. Office of Science ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2016

Mô tả vật lý: Size: p. 524-529 : , digital, PDF file.

Bộ sưu tập: Metadata

ID: 260673

 High humidity has a strong influence on the development of numerous diseases affecting the above-ground parts of plants (the phyllosphere) in crop fields and natural ecosystems, but the molecular basis of this humidity effect is not understood. Previous studies have emphasized immune suppression as a key step in bacterial pathogenesis. We show that humidity-dependent, pathogen-driven establishment of an aqueous intercellular space (apoplast) is another important step in bacterial infection of the phyllosphere. Bacterial effectors, such as <
 em>
 Pseudomonas syringae<
 /em>
  HopM1, induce establishment of the aqueous apoplast and are sufficient to transform non-pathogenic <
 em>
 P. syringae<
 /em>
  strains into virulent pathogens in immunodeficient <
 em>
 Arabidopsis thaliana<
 /em>
  under high humidity. <
 em>
 Arabidopsis<
 /em>
  quadruple mutants simultaneously defective in a host target (AtMIN7) of HopM1 and in pattern-triggered immunity could not only be used to reconstitute the basic features of bacterial infection, but also exhibited humidity-dependent dyshomeostasis of the endophytic commensal bacterial community in the phyllosphere. These results highlight a new conceptual framework for understanding diverse phyllosphere?bacterial interactions.
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