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 ?
Water deficit in field-grown Gossypium hirsutum primarily limits net photosynthesis by decreasing stomatal conductance, increasing photorespiration, and increasing the ratio of dark respiration to gross photosynthesis.
C4 plants possess biochemical and anatomical mechanisms to raise the intercellular carbon dioxide concentration at the site of fixation; this reduces (and sometimes eliminates) carbon losses by photorespiration.
O2] can be attributed to the PSII heterogeneity (Melis, 1991), the increase of photorespiration (Raven & Johnston, 1991) and the underexplored phenomena of PSII cycling (Feikema et al.
To construct accurate model predictions for soybean crops, some specific aspects, such as photorespiration and the CO2 assimilation rate, must be taken into consideration.
Libert and Franceschi (1987) suggested that photorespiration is not a prerequisite for oxalate synthesis.
2] increases rate of fixed carbon and also suppresses photorespiration.
The change in succinate dehydrogenase activity in different species may be because of the fact that change in the enzyme significantly affects the rate of TCA functioning and also the balance between photosynthesis, respiration and photorespiration in the cell (Popov et al, 2007).
3] species have a version of respiration called photorespiration that can use up a significant portion of the carbon energy fixed during photosynthesis.
In C3 plants, respiration rates increase in the light, a process termed photorespiration, and this increased use of photosynthesis decreases the efficiency of carbon fixation.
2]) is produced by the glycollate oxidase reaction in the process of photorespiration (Foyer et al.