Os09g0272900

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Annotated Information

Function

A prerequisite for the plant to induce defence response is the recognition of microbes and putative pathogens. Therefore, plants detect conserved microbial molecules called pathogen-(or microbe-) associated molecular patterns (PAMPs/MAMPs) as well as damage-associated molecular patterns.DAMPs are endogenous elicitors of the plant and are produced in consequence of the damage that is caused by plant-colonizing pathogens. However, resistance as a consequence of PAMP-induced defence responses is designated as PAMP-triggered immunity (PTI). PAMPs are usually epitopic structures within molecules and are essential structural components for the microbe. They are present in many microbial species, and are, while not existing in the potential host, perceived by a broad spectrum of host species. Some typical bacterial PAMPs are lipopolysaccharides (LPS), peptidoglycans (PGNs), flagellin, and the elongation factor Tu (EF-Tu). LPS are found in the outer membrane of Gram-negative bacteria, and plant cells predominantly recognise the conserved lipid A but also the core oligosaccharide and the O-antigen structure of LPS.

Expression

The expression of PR genes is often a result of triggered SA-, JA- or ethylene-dependent defence pathways. PR-proteins are classified in at least 17different families based on their primary structure.Many PR protein families possess direct antimicrobial activities: proteins of the PR3, PR4 and PR-11 families work as chitinases, whereas the PR-2 family represent β-1,3-glucanases. By contrast, the microbial targets of many PR-families are still unkown. How is PR gene expression activated? PR-1 gene expression is predominantly triggered by the SA-pathway and, exogenous application of SA is sufficient to induce PR-1 expression. NPR-1 (NON-EXPRESSOR OF PR GENES1) is acentral mediator of SA signalling and PR gene expression. The corresponding mutant impaired in NPR-1 expression does not respond to SA application by PR gene expression, but accumulates SA after pathogen infection.


Expression of PB.JPG

Evolution

The evolution of PB can be described as follows:


  Evolution of PB.JPG

Labs working on this gene

[1]Shandong university of science and technology college of life science, shandong zibo 255049;

[2]Shandong academy of agricultural sciences high-tech research center, shandong jinan 250100

[3]Shandong academy of agricultural sciences high-tech research center, jinan, shandong province, 250100

[4]Shandong academy of agricultural sciences high-tech research center, jinan, shandong province, 250100;

[5]The ministry of agriculture of huanghuaihai laboratory of crop genetic improvement and biotechnology, shandong jinan 250100

[6]Shandong university of science and technology college of life science, shandong zibo, 255049

References

[1]Local and systemic resistance in Arabidopsis thaliana in response to Pseudomonas syringae: impact of light and phytosterols. Dissertation zur Erlangung des naturwissenschaftlichen Doktorgrades der Julius-Maximilians-Universität Würzburg

[2]YANG Hui, XUE Yan-jiu, WANG Ying-ying, MA Hui-quan, XIE Xian-zhi.Expression Patterns of One Phytochrome B-Regulated NBS-LRR Family Gene in Rice.Shandong Agricultural Sciences.2011, (6).

Structured Information