Components of the Pseudomonas syringae Type III Secretion System Can Suppress and May Elicit Plant Innate Immunity
| Autor: | Alan Collmer, Duck Hwan Park, Hye-Sook Oh |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Hypersensitive response
Physiology Pseudomonas syringae Nicotiana benthamiana Chromosomal translocation Microbiology Type three secretion system chemistry.chemical_compound Bacterial Proteins Tobacco Plant Diseases Innate immune system biology Effector fungi Callose Gene Expression Regulation Bacterial General Medicine biochemical phenomena metabolism and nutrition biology.organism_classification Immunity Innate Plant Leaves Protein Transport chemistry Host-Pathogen Interactions bacteria Reactive Oxygen Species Agronomy and Crop Science |
| Zdroj: | Molecular Plant-Microbe Interactions®. 23:727-739 |
| ISSN: | 1943-7706 0894-0282 |
| DOI: | 10.1094/mpmi-23-6-0727 |
| Popis: | The type III secretion system (T3SS) of Pseudomonas syringae translocates into plant cells multiple effectors that suppress pathogen-associated molecular pattern (PAMP)-triggered immunity (PTI). P. syringae pv. tomato DC3000 no longer delivers the T3SS translocation reporter AvrPto-Cya in Nicotiana benthamiana leaf tissue in which PTI was induced by prior inoculation with P. fluorescens(pLN18). Cosmid pLN18 expresses the T3SS system of P. syringae pv. syringae 61 but lacks the hopA1Psy61 effector gene. P. fluorescens(pLN18) expressing HrpHPtoDC3000 or HopP1PtoDC3000, two T3SS-associated putative lytic transglycosylases, suppresses PTI, based on multiple assays involving DC3000 challenge inoculum (AvrPto-Cya translocation, hypersensitive response elicitation, and colony development in planta) or on plant responses (vascular dye uptake or callose deposition). Analysis of additional mutations in pHIR11 derivatives revealed that the pLN18-encoded T3SS elicits a higher level of reactive oxygen species (ROS) than does P. fluorescens without a T3SS, that enhanced ROS production is dependent on the HrpK1 translocator, and that HopA1Psy61 suppresses ROS elicitation attributable to both the P. fluorescens PAMPs and the presence of a functional T3SS. |
| Databáze: | OpenAIRE |
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