Chloroplast-mediated activation of plant immune signalling in Arabidopsis

被引：311

作者：

Nomura, Hironari ^{[1
,2
]}

Komori, Teiko ^{[1
]}

Uemura, Shuhei ^{[1
]}

Kanda, Yui ^{[1
]}

Shimotani, Koji ^{[1
]}

Nakai, Kana ^{[1
]}

Furuichi, Takuya ^{[3
]}

Takebayashi, Kohsuke ^{[4
]}

Sugimoto, Takanori ^{[4
]}

Sano, Satoshi ^{[1
]}

Suwastika, I. Nengah ^{[1
]}

Fukusaki, Eiichiro ^{[4
]}

Yoshioka, Hirofumi ^{[2
,5
]}

Nakahira, Yoichi ^{[1
]}

Shiina, Takashi ^{[1
]}

机构：

[1] Kyoto Prefectural Univ, Grad Sch Life & Environm Sci, Sakyo Ku, Kyoto 6068522, Japan

[2] Nagoya Univ, Grad Sch Bioagr Sci, Chikusa Ku, Nagoya, Aichi 4648601, Japan

[3] Nagoya Univ, Ecotopia Sci Inst, Chikusa Ku, Nagoya, Aichi 4648603, Japan

[4] Osaka Univ, Grad Sch Engn, Suita, Osaka 5650871, Japan

[5] Ehime Univ, Venture Business Lab, Matsuyama, Ehime 7908577, Japan

来源：

NATURE COMMUNICATIONS | 2012年 / 3卷

关键词：

TRANSCRIPTION FACTORS; HYDROGEN-PEROXIDE; PLASTID SIGNALS; GENE-EXPRESSION; CALCIUM; LIGHT; DEFENSE; STRESS; BIOSYNTHESIS; OXYGEN;

D O I：

10.1038/ncomms1926

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Chloroplasts have a critical role in plant immunity as a site for the production for salicylic acid and jasmonic acid, important mediators of plant immunity. However, the molecular link between chloroplasts and the cytoplasmic-nuclear immune system remains largely unknown. Here we show that pathogen-associated molecular pattern (PAMP) signals are quickly relayed to chloroplasts and evoke specific Ca2+ signatures in the stroma. We further demonstrate that a chloroplast-localized protein, named calcium-sensing receptor (CAS), is involved in stromal Ca2+ transients and responsible for both PAMP-induced basal resistance and R gene-mediated hypersensitive cell death. CAS acts upstream of salicylic acid accumulation. Transcriptome analysis demonstrates that CAS is involved in PAMP-induced expression of defence genes and suppression of chloroplast gene expression possibly through O-1(2)-mediated retrograde signalling, allowing chloroplast-mediated transcriptional reprogramming during plant immune responses. The present study reveals a previously unknown chloroplast-mediated signalling pathway linking chloroplasts to cytoplasmic-nuclear immune responses.

引用

页数：10

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