Regulation of a proteinaceous elicitor-induced Ca2+ influx and production of phytoalexins by a putative voltage-gated cation channel, OsTPC1, in cultured rice cells.

ABSTRACT: Pathogen/microbe- or plant-derived signaling molecules (PAMPs/MAMPs/DAMPs) or elicitors induce increases in the cytosolic concentration of free Ca(2+) followed by a series of defense responses including biosynthesis of antimicrobial secondary metabolites called phytoalexins; however, the molecular links and regulatory mechanisms of the phytoalexin biosynthesis remains largely unknown. A putative voltage-gated cation channel, OsTPC1 has been shown to play a critical role in hypersensitive cell death induced by a fungal xylanase protein (TvX) in suspension-cultured rice cells. Here we show that TvX induced a prolonged increase in cytosolic Ca(2+), mainly due to a Ca(2+) influx through the plasma membrane. Membrane fractionation by two-phase partitioning and immunoblot analyses revealed that

SUBMITTER: Hamada H 

PROVIDER: S-EPMC3322971 | biostudies-literature | 2012 Mar

REPOSITORIES: biostudies-literature