Mitochondrial Signaling in Plants Under Hypoxia: Use of Reactive Oxygen Species (ROS) and Reactive Nitrogen Species (RNS)

Publikation: Bidrag til bog/antologi/rapport/proceedingBidrag til bog/antologiForskning

Hypoxia commonly occurs in roots in water-saturated soil and in maturing and germinating seeds. We here review the role of the mitochondria in the cellular response to hypoxia with an emphasis on the turnover of Reactive Oxygen Species (ROS) and Reactive Nitrogen Species (RNS) and their potential signaling function. Under hypoxia, aerobic respiration in the mitochondria can be limited by the oxygen supply, the electron transport component are more reduced and superoxide and NO are produced in increasing amounts at Complexes III and IV initiating the formation of a range of other ROS and RNS. Unless removed, these compounds can react with proteins either reversibly—one-step oxidation or nitrosylation of cysteine—or irreversibly by carbonylation and this affects the properties of the oxidized proteins in, as yet, mostly unknown ways. ROS, probably hydrogen peroxide, and/or oxidized peptides are thought to be responsible for retrograde signaling to the nucleus. NO, formed by nitrite reduction, is either recycled through the hemoglobin/NO cycle (an oxygen-consuming process) or lost from the tissue by diffusion. Under severe hypoxia this can be a significant drain on the plants fixed nitrogen reserves.
TitelReactive Oxygen and Nitrogen Species Signaling and Communication in Plants
RedaktørerA U Igamberdiev, K J Gupta
Antal sider5
ForlagSpringer International Publishing Switzerland
ISBN (trykt)978-3-319-10078-4
ISBN (Elektronisk)978-3-319-10079-1
StatusUdgivet - 2015
SerietitelSignaling and Communication in Plants

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