期刊
EMBO JOURNAL
卷 29, 期 5, 页码 1007-1018出版社
WILEY
DOI: 10.1038/emboj.2009.402
关键词
CaATPase; cryptogein; innate immunity; N-immune receptor; programmed cell death; TMV
资金
- NSF [DBI-0211872]
- NIH [GM62625]
Programmed cell death (PCD) initiated at the pathogen-infected sites during the plant innate immune response is thought to prevent the development of disease. Here, we describe the identification and characterization of an ER-localized type IIB Ca2+-ATPase (NbCA1) that function as a regulator of PCD. Silencing of NbCA1 accelerates viral immune receptor N- and fungal-immune receptor Cf9-mediated PCD, as well as non-host pathogen Pseudomonas syringae pv. tomato DC3000 and the general elicitor cryptogein-induced cell death. The accelerated PCD rescues loss-of-resistance phenotype of Rar1, HSP90-silenced plants, but not SGT1-silenced plants. Using a genetically encoded calcium sensor, we show that down-regulation of NbCA1 results in the modulation of intracellular calcium signalling in response to cryptogein elicitor. We further show that NbCAM1 and NbrbohB function as downstream calcium decoders in N- immune receptor-mediated PCD. Our results indicate that ER-Ca2+-ATPase is a component of the calcium efflux pathway that controls PCD during an innate immune response. The EMBO Journal (2010) 29, 1007-1018. doi: 10.1038/emboj.2009.402; Published online 14 January 2010
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