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HERO ID
853741
Reference Type
Journal Article
Title
Metabolism of reactive oxygen species and reactive nitrogen species in pepper (Capsicum annuum L.) plants under low temperature stress
Author(s)
Airaki, M; Leterrier, M; Mateos, RM; Valderrama, R; Chaki, M; Barroso, JB; Del Río, LA; Palma, JM; Corpas, FJ
Year
2012
Is Peer Reviewed?
1
Journal
Plant, Cell and Environment
ISSN:
0140-7791
EISSN:
1365-3040
Volume
35
Issue
2
Page Numbers
281-295
Language
English
PMID
21414013
DOI
10.1111/j.1365-3040.2011.02310.x
Web of Science Id
WOS:000298795600008
Abstract
Low temperature is an environmental stress that affects crop production and quality and regulates the expression of many genes, and the level of a number of proteins and metabolites. Using leaves from pepper (Capsicum annum L.) plants exposed to low temperature (8 °C) for different time periods (1 to 3 d), several key components of the metabolism of reactive nitrogen and oxygen species (RNS and ROS, respectively) were analysed. After 24 h of exposure at 8 °C, pepper plants exhibited visible symptoms characterized by flaccidity of stems and leaves. This was accompanied by significant changes in the metabolism of RNS and ROS with an increase of both protein tyrosine nitration (NO(2) -Tyr) and lipid peroxidation, indicating that low temperature induces nitrosative and oxidative stress. During the second and third days at low temperature, pepper plants underwent cold acclimation by adjusting their antioxidant metabolism and reverting the observed nitrosative and oxidative stress. In this process, the levels of the soluble non-enzymatic antioxidants ascorbate and glutathione, and the activity of the main NADPH-generating dehydrogenases were significantly induced. This suggests that ascorbate, glutathione and the NADPH-generating dehydrogenases have a role in the process of cold acclimation through their effect on the redox state of the cell.
Keywords
antioxidants; NADP-dehydrogenases; nitric oxide; nitrotyrosine; RNS; ROS
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