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植物免疫调节F-Box蛋白在无病原体情况下支持质体功能。

The Plant Immunity Regulating F-Box Protein Supports Plastid Function in Absence of Pathogens.

作者信息

Hedtmann Christiane, Guo Wei, Reifschneider Elena, Heiber Isabelle, Hiltscher Heiko, van Buer Jörn, Barsch Aiko, Niehaus Karsten, Rowan Beth, Lortzing Tobias, Steppuhn Anke, Baier Margarete

机构信息

Plant Physiology, Dahlem Centre of Plant Sciences, Free University of BerlinBerlin, Germany.

Plant Physiology and Biochemistry, Bielefeld UniversityBielefeld, Germany.

出版信息

Front Plant Sci. 2017 Sep 22;8:1650. doi: 10.3389/fpls.2017.01650. eCollection 2017.

DOI:10.3389/fpls.2017.01650
PMID:29018463
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5615928/
Abstract

The mutant ( of was isolated in a genetic screening approach for mutants with defects in chloroplast-to-nucleus redox signaling. It has an atypically low activation status of the 2-Cys peroxiredoxin-A promoter in the seedling stage. shows wildtype-like germination, seedling development and greening, but slower growth and reduced biomass in the rosette stage. Mapping of the casual mutation revealed that carries a single nucleotide polymorphism in the gene encoding (At4g12560), leading to a premature stop codon. CPR1 is known as a repressor of pathogen signaling and regulator of microtubule organization. Allelism of and revealed a function of CPR1 in chloroplast stress protection. Expression studies in pathogen signaling mutants demonstrated that CPR1-mediated activation of genes for photosynthesis and chloroplast antioxidant protection is, in contrast to activation of pathogen responses, regulated independently from PAD4-controlled salicylic acid (SA) accumulation. We conclude that the support of plastid function is a basic, SA-independent function of CPR1.

摘要

该突变体（ ）是在一项针对叶绿体到细胞核氧化还原信号传导缺陷突变体的遗传筛选方法中分离得到的。它在幼苗期2-半胱氨酸过氧化物酶A启动子的激活状态异常低。 表现出类似野生型的萌发、幼苗发育和绿化，但在莲座期生长较慢且生物量减少。对该偶然突变的定位显示， 在编码 （At4g12560）的基因中携带一个单核苷酸多态性，导致提前出现终止密码子。CPR1是已知的病原体信号传导抑制因子和微管组织调节因子。 和 的等位基因分析揭示了CPR1在叶绿体应激保护中的功能。在病原体信号突变体中的表达研究表明，与病原体反应的激活相反，CPR1介导的光合作用基因和叶绿体抗氧化保护基因的激活独立于PAD4控制的水杨酸（SA）积累进行调节。我们得出结论，质体功能的支持是CPR1的一种基本的、不依赖SA的功能。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ac3d/5615928/005c6d954338/fpls-08-01650-g0012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ac3d/5615928/005c6d954338/fpls-08-01650-g0012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ac3d/5615928/b5f13ff2a5eb/fpls-08-01650-g0001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ac3d/5615928/41b7d465cd41/fpls-08-01650-g0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ac3d/5615928/25eab44091f2/fpls-08-01650-g0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ac3d/5615928/f60d68e2609c/fpls-08-01650-g0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ac3d/5615928/245be44a1472/fpls-08-01650-g0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ac3d/5615928/33420d5bd65c/fpls-08-01650-g0006.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ac3d/5615928/09f5d3b8f830/fpls-08-01650-g0008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ac3d/5615928/f0a0e0cf4d10/fpls-08-01650-g0009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ac3d/5615928/7ac1d4eb111a/fpls-08-01650-g0010.jpg
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