Please use this identifier to cite or link to this item: http://223.31.159.10:8080/jspui/handle/123456789/1586
Title: Nitric oxide, energy and redox-dependent responses to hypoxia
Authors: Samant, Sanjib Bal
Yadav, Nidhi
Swain, Jagannath
Joseph, Josepheena
Kumari, Aprajita
Praveen, Afsana
Sahoo, Ranjan Kumar
Manjunatha, Girigowda
Seth, Chandra Shekar
Singla-Pareek, Sneh Lata
Foyer, Christine H
Pareek, Ashwani
Gupta, Kapuganti Jagadis
Keywords: Hypoxia
adaptations
aerenchyma
nitric oxide
phytoglobin
redox
Issue Date: 2024
Publisher: Oxford University Press
Citation: Journal of Experimental Botany, 75(15): 4573-4588
Abstract: Hypoxia occurs when the oxygen levels fall below the levels required for mitochondria to support respiration. Regulated hypoxia is associated with quiescence, particularly in storage organs (seeds) and stem cell niches. In contrast, environmentally-induced hypoxia poses significant challenges for metabolically-active cells that are adapted to aerobic respiration. The perception of oxygen availability through cysteine oxidases, which function as oxygen-sensing enzymes in plants that control the N-degron pathway, and the regulation of hypoxia-responsive genes and processes is essential to survival. Functioning together with reactive oxygen species (ROS), particularly hydrogen peroxide and reactive nitrogen species (RNS), such as nitric oxide (•NO), nitrogen dioxide (•NO2), S‐nitrosothiols (SNOs), and peroxynitrite (ONOO−), hypoxia signaling pathways trigger anatomical adaptations such as formation of aerenchyma, mobilization of sugar reserves for anaerobic germination, formation of aerial adventitious roots and hyponastic response. NO and hydrogen peroxide (H2O2) participate in local and systemic signaling pathways that facilitate acclimation to changing energetic requirements, controlling glycolytic fermentation, the GABA shunt and amino acid synthesis. NO enhances antioxidant capacity and contributes to the recycling of redox equivalents energy metabolism through the phytoglobin (Pgb)-NO cycle. Here, we summarize current knowledge, highlighting the central role of NO and redox regulation in adaptive responses that prevent hypoxia-induced death in challenging conditions such as flooding.
Description: Accepted date: 01 April 2024
URI: https://academic.oup.com/jxb/advance-article-abstract/doi/10.1093/jxb/erae139/7638665?redirectedFrom=fulltext&login=true
http://223.31.159.10:8080/jspui/handle/123456789/1586
ISSN: 1460-2431
0022-0957
Appears in Collections:Institutional Publications

Files in This Item:
File Description SizeFormat 
Gupta KJ_2024_6.pdf
  Restricted Access
2.18 MBAdobe PDFView/Open Request a copy


Items in IR@NIPGR are protected by copyright, with all rights reserved, unless otherwise indicated.