cGMP in ozone and NO dependent responses

被引：9

作者：

Ederli, Luisa ^{[1
]}

Meier, Stuart ^{[2
]}

Borgogni, Andrea ^{[1
]}

Reale, Lara ^{[1
]}

Ferranti, Francesco ^{[1
]}

Gehring, Chris ^{[2
]}

Pasqualini, Stefania ^{[1
]}

机构：

[1] Univ Perugia, Dept Plant Biol & Agroenvironm & Anim Biotechnol, I-06121 Perugia, Italy

[2] Univ Western Cape, Dept Biotechnol, Bellville, South Africa

来源：

PLANT SIGNALING & BEHAVIOR | 2008年 / 3卷 / 01期

关键词：

ozone; nitric oxide; ethylene; alternative oxidase (AOX); cGMP; Nicotiana tabacum L; Arabidopsis thaliana;

D O I：

10.4161/psb.3.1.4818

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

We have recently reported that ozone (O-3) can inhibit mitochondrial respiration and induce activation of the alternative oxidase (AOX) pathway and in particular AOX1a in tobacco. While O-3 causes mitochondrial H2O2, early leaf nitric oxide (NO) as well as transient ethylene (ET) accumulation, the levels of jasmonic acid and 12-oxo-phytodienoic acid remained unchanged. It was shown that both, NO and ET dependent pathways can induce AOX1a transcription by O-3. AOX plays a role in reducing reactive oxygen species (ROS) which in turn are linked to biotic and abiotic plant stresses, much like the second messengers guanosine 3',5' -cyclic monophosphate (cGMP). The goal is to unravel specific cGMP signatures and induction pathways downstream from O-3 and NO, including transcription of AOX1a. Here we propose that some late (> 3h) responses to NO, e.g., the accumulation of phenylalanine lyase (PAL) transcripts, are critically cGMP dependent, while the early (< 2h) responses, including AOX1a induction are not.

引用

页码：36 / 37

页数：2

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