Brassica napus possesses an expanded set of polygalacturonase inhibitor protein genes that are differentially regulated in response to Sclerotinia sclerotiorum infection, wounding and defense hormone treatment.

Planta
Dwayne HegedusSamuel Roger Rimmer

Abstract

Most plants encode a limited set of polygalacturonase inhibitor (PGIP) genes that may be involved in aspects of plant development, but more importantly in the inactivation of polygalacturonases (PG) secreted by pathogens. Previously, we characterized two Brassica napus PGIP genes, BnPgip1 and BnPgip2, which were differentially expressed in response to pathogen infection and wounding. Here we report that the B. napus genome encodes a set of at least 16 PGIP genes that are similar to BnPgip1 or BnPgip2. This is the largest Pgip gene family reported to date. Comparison of the BnPGIPs revealed several sites within the xxLxLxx region of leucine rich repeats that form beta-sheets along the interacting face of the PGIP that are hypervariable and represent good candidates for generating PGIP diversity. Characterization of the regulatory regions and RT-PCR studies with gene-specific primers revealed that individual genes were differentially responsive to pathogen infection, mechanical wounding and signaling molecules. Many of the BnPgip genes responded to infection by the necrotic pathogen, Sclerotinia sclerotiorum; however, these genes were also induced either by jasmonic acid, wounding and salicylic acid or some combination thereof. T...Continue Reading

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Citations

Jun 20, 2012·BMC Plant Biology·Corina M FusariNorma B Paniego
Nov 25, 2011·Enzyme and Microbial Technology·Sebastián TorresMaría Inés Isla
Jun 6, 2009·Seminars in Cell & Developmental Biology·Stijn LagaertGuido Volckaert
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Jan 19, 2010·Molecular Plant Pathology·Zafer Dallal BashiMohammed H Borhan
Mar 6, 2021·Journal of Agricultural and Food Chemistry·Li-Na DingXiao-Li Tan

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