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电信号、钙信号和活性氧信号参与非光化学猝灭和光合作用系统调控的证据

Evidence for the Involvement of Electrical, Calcium and ROS Signaling in the Systemic Regulation of Non-Photochemical Quenching and Photosynthesis.

作者信息

Białasek Maciej, Górecka Magdalena, Mittler Ron, Karpiński Stanisław

机构信息

Department of Plant Genetics, Breeding and Biotechnology, Faculty of Horticulture, Biotechnology and Landscape Architecture, Warsaw University of Life Sciences SGGW, Nowoursynowska, Warsaw, Poland.

Department of Biological Sciences, College of Arts and Sciences, University of North Texas, Denton, Texas, USA.

出版信息

Plant Cell Physiol. 2017 Feb;58(2):207-215. doi: 10.1093/pcp/pcw232. Epub 2017 Feb 10.

DOI:10.1093/pcp/pcw232
PMID:28184891
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5444583/
Abstract

In contrast to the function of reactive oxygen species, calcium, hormones and small RNAs in systemic signaling, systemic electrical signaling in plants is poorly studied and understood. Pulse amplitude-modulated Chl fluorescence imaging and surface electrical potential measurements accompanied by pharmacological treatments were employed to study stimuli-induced electrical signals in leaves from a broad range of plant species and in Arabidopsis thaliana mutants. Here we report that rapid electrical signals in response to a local heat stimulus regulate systemic changes in non-photochemical quenching (NPQ) and PSII quantum efficiency. Both stimuli-induced systemic changes in NPQ and photosynthetic capacity as well as electrical signaling depended on calcium channel activity. Use of an Arabidopsis respiratory burst oxidase homolog D (RBOHD) mutant (rbohD) as well as an RBOH inhibitor further suggested a cross-talk between ROS and electrical signaling. Our results suggest that higher plants evolved a complex rapid long-distance calcium-dependent electrical systemic signaling in response to local stimuli that regulates and optimizes the balance between PSII quantum efficiency and excess energy dissipation in the form of heat by means of NPQ.

摘要

与活性氧、钙、激素和小RNA在系统信号传导中的功能不同，植物中的系统电信号传导研究较少且了解不足。采用脉冲幅度调制叶绿素荧光成像和表面电位测量，并结合药理学处理，以研究多种植物叶片以及拟南芥突变体中刺激诱导的电信号。在此我们报告，响应局部热刺激的快速电信号调节非光化学猝灭（NPQ）和PSII量子效率的系统变化。刺激诱导的NPQ和光合能力的系统变化以及电信号传导均依赖于钙通道活性。使用拟南芥呼吸爆发氧化酶同源物D（RBOHD）突变体（rbohD）以及RBOH抑制剂进一步表明了活性氧与电信号传导之间的相互作用。我们的结果表明，高等植物进化出了一种复杂的快速长距离钙依赖性电系统信号传导，以响应局部刺激，该刺激通过NPQ调节并优化PSII量子效率与以热形式存在的过剩能量耗散之间的平衡。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2824/5444583/800604f63d5b/pcw232f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2824/5444583/1cacce675e12/pcw232f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2824/5444583/e5b011ad72fc/pcw232f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2824/5444583/174de43a16b4/pcw232f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2824/5444583/067d32771268/pcw232f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2824/5444583/800604f63d5b/pcw232f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2824/5444583/1cacce675e12/pcw232f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2824/5444583/e5b011ad72fc/pcw232f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2824/5444583/174de43a16b4/pcw232f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2824/5444583/067d32771268/pcw232f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2824/5444583/800604f63d5b/pcw232f5.jpg

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