Expression profile analysis of the polygalacturonase-inhibiting protein genes in rice and their responses to phytohormones and fungal infection.

Plant Cell Reports
Liaoxun LuYongjun Lin

Abstract

Polygalacturonase-inhibiting proteins (PGIPs) are typically leucine-rich repeat (LRR) proteins that can inhibit the activity of fungal polygalacturonases (PGs). In this study, two new Ospgip genes, named Ospgip6 and Ospgip7 with consensus sequence of ten imperfect LRR motif located on rice chromosomes 8 and 9, were identified using BLAST analysis. Both of them appear to be extracellular glycoproteins. To have a global view of the dynamic gene expression pattern, seven Ospgip genes were first analyzed using the Affymetrix rice genome array data from online resource. All of these seven Ospgip genes showed variable expression patterns among tissues/organs. In order to further investigate the potential function of these Ospgip genes, the responses of Ospgip genes to the treatment of various phytohormones (abscisic acid, brassinosteroid, gibberellic acid, 3-indole acetic acid, jasmonic acid, kinetin, naphthalene acetic acid and salicylic acid) as well as fungal infection were analyzed by real-time PCR using time course array. Generally, all the Ospgip genes were slightly up-regulated in the indica rice cultivar Minghui 63 under GA(3), KT and NAA treatments (except Ospgip2, which was down-regulated under KT treatment). In the japonic...Continue Reading

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Citations

Dec 10, 2014·Functional & Integrative Genomics·Aiyun WangZengyan Zhang
Dec 10, 2014·Plant Molecular Biology·Rui WangYongjun Lin

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