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- W139650930 endingPage "244" @default.
- W139650930 startingPage "223" @default.
- W139650930 abstract "Recent studies document that oxygen deprivation is not only restricted to stress conditions such as flooding, but is also associated with the normal development and growth of storage organs such as tubers, fruits, and seeds in well-oxygenated surroundings. The decrease in internal oxygen concentrations in these tissues is attributable to their active metabolism and internal restrictions in oxygen entry during their normal development. Short-term balancing of internal oxygen concentrations has been shown to involve an oxygen-sensing system that regulates respiration in response to normal fluctuations in internal oxygen concentrations. The resulting changes in adenylate energy state lead to a widespread regulation of ATP-consuming processes which are involved in storage and growth. Developmental changes in internal oxygen concentrations also have been found to be linked to global changes in gene transcription networks, leading to longer-term adaptive responses in storage metabolism and growth. This involves a switch to more energy-conserving pathways of (1) sucrose degradation via sucrose synthase, (2) nucleotide synthesis via salvage pathways, and (3) respiratory metabolism via alanine aminotransferase. Group VII ethylene-response-factor transcription factors have been identified to function as oxygen sensors in the regulation of these processes. They were shown to respond to a decrease in internal oxygen that occurs during the normal development of potato tubers, suggesting a role of these oxygen-sensor proteins in the regulation of sucrose and starch metabolism in response to tuber development. Possible implications for strategies to improve crop yield are discussed." @default.
- W139650930 created "2016-06-24" @default.
- W139650930 creator A5039822296 @default.
- W139650930 date "2013-12-06" @default.
- W139650930 modified "2023-09-23" @default.
- W139650930 title "Adaptation of Storage Metabolism to Oxygen Deprivation" @default.
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