NDLI: Silencing of mitochondrial uncoupling protein gene aggravates chilling stress by altering mitochondrial respiration and electron transport in tomato

Content Provider	Springer Nature Link
Author	Liu, Airong Chen, Shuangchen Wang, Mengmeng Wang, Zhonghong Zheng, Caixia Zhao, Puyan Guo, Dalong Ahammed, Golam Jalal
Copyright Year	2015
Abstract	Mitochondrial uncoupling proteins (UCPs) play crucial role in the regulation of metabolic thermogenesis, photosynthesis, redox poise, and response to stress situations. However, the involvements UCPs and its regulatory mechanisms in plant mitochondrial respiration and electron transport have not yet been fully substantiated. In this article, we show that UCP is essential for effective respiratory balance and mitochondrial electron transport poise under chilling stress in tomato. Compared with pTRV (non-silenced) plants, suppression of LeUCP the expression by virus-induced gene silencing significantly decreased the total, SHAM-resistant, and CN-resistant respiratory rates, but increased cytosolic glycolysis pathway-related gene expression and enzymes’ activities under chilling stress. The transcripts’ abundances of UCRH, COX1, COX2, AOX1a, AOX2, and NDC1 genes involved in main and bypass miETC components were decreased, while those of NDUO and SDH4 were slightly increased in the leaves of LeUCP-silenced plants. In addition, silencing of LeUCP aggravated H$_{2}$O$_{2}$ and O$_{2}$ $^{−}$ accumulation levels in leaves under chilling stress. Our results provide strong evidence that LeUCP is critical for respiratory homeostasis and mitochondrial electron transport signaling under chilling stress in tomato.
Starting Page	1
Ending Page	9
Page Count	9
File Format	PDF
ISSN	01375881
Journal	Acta Physiologiae Plantarum
Volume Number	37
Issue Number	11
e-ISSN	18611664
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-10-06
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Electron transport chain Mitochondrial uncoupling protein Respiratory homeostasis Solanum lycopersicum Plant Physiology Plant Genetics & Genomics Plant Biochemistry Plant Pathology Plant Anatomy/Development Agriculture
Content Type	Text
Resource Type	Article
Subject	Physiology Plant Science Agronomy and Crop Science

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