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- Title
Plant Respiration and Global Climatic Changes.
- Authors
Rakhmankulova, Z. F.
- Abstract
The review summarizes current notions about biochemical, physiological, and molecular mechanisms underlying the response of respiratory pathways to the elevation of atmospheric СО2 concentration (eCO2) and associated factors (high temperature and drought). Direct and indirect, as well as brief and long-term, effects of climatic changes on individual stages of respiration and its functional components were analyzed. It was ascertained that energy-efficient (EE) pathways of respiration (glycolysis, the Krebs cycle, and cytochrome ETC pathway) are highly variable depending on the intensity, duration, and nature of the climatic agents and on the species and age of plants. An important role in adaptation to climatic changes and the maintenance of energy balance is performed by energy inefficient (EI) components of respiration. They comprise glucose-6-phosphate shunt of oxidative pentose phosphate pathway, alternative oxidase (АОХ), type II NADPH dehydrogenases, and photorespiration. It is assumed that their stimulation upon climatic changes (except for photorespiration at eCO2) is related to a rise in expenditures on the maintenance of antioxidant mechanisms and depends on dissipation of excess metabolites and energy necessary for protection and normal operation of the photosynthetic apparatus.
- Subjects
CLIMATE change; RESPIRATION; RESPIRATION in plants; PENTOSE phosphate pathway; NAD(P)H dehydrogenases; KREBS cycle; DROUGHTS; SOIL respiration
- Publication
Russian Journal of Plant Physiology, 2022, Vol 69, Issue 6, p1
- ISSN
1021-4437
- Publication type
Article
- DOI
10.1134/S1021443722060218