photorespiration


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pho·to·res·pir·a·tion

(fō'tō-res'pĭr-ā'shŭn),
Light-enhanced respiration in photosynthetic organisms; that is, light increases O2 utilization.

photorespiration

(fō′tō-rĕs′pə-rā′shən)
n.
Oxidation of carbohydrates in plants with the release of carbon dioxide during photosynthesis.

photorespiration

a process in which products from photosynthesis are oxidized to release CO2. Mitochondria are not involved and there is no yield of ATP, thus wasting some of the solar energy used to fix CO2 in the initial photosynthetic reactions.
References in periodicals archive ?
23) The term refers to oxygen competing with carbon dioxide and preventing its fixation; the net effect of photorespiration is that oxygen in the atmosphere depresses the rate of photosynthesis.
This reaction is essential to the production of glutamine and also serves as an effective means of using ammonia that has been produced by photorespiration and other metabolic processes in plants.
Role of enzyme rubisco on photosynthesis and photorespiration demonstrated.
No effects could be found on the CO2 compensation point of field grown cotton when applied with foliar methanol, indicating common rates of photorespiration [48].
2] emission by transpiration and photorespiration equals the carbon fixed by photosynthesis) was 53.
The rate of reopening of RCIIs in high light may result from either an enhanced rate of the linear electron transport that leads to the formation of ATP and NADPH, or from enhanced rates of alternative electron transport pathways (pseudo-cyclic or cyclic) that are associated with sink processes such as photorespiration, [O.
1993) proposed that inhibition of photorespiration may lower the rate of biosynthesis of oxalate in spinach.
The production of ROS during stresses results from pathways, such as photorespiration, from the photosynthetic apparatus and from mitochondrial respiration [15].
3] species, which means that it is subject to photorespiration when it is under high irradiance.