Abstract
A transient CO2 burst is exhibited by irradiated leaves of the C3 plant geranium (Pelargonium X hortorum, Bailey) after the irradiance is quickly lowered. The light CO2 burst appears to be related to photorespiration because of its irradiance dependency and its sensitivity to other environmental components such as CO2 and O2 concentration. The term post-lower-irradiance CO2 burst or PLIB is used to describe the phenomenon. The PLIB appears to be a quantitative measurement of photorespiration with intact geranium leaves. The PLIB has been observed with intact leaves of other C3 plants but not with C4 leaves. Therefore, it is proposed that, after maximizing intact leaf photosynthetic rates and leaf chamber gas measuring conditions, photorespiration can be measured with intact C3 leaves such as geranium as a transient post-lower-irradiance CO2 burst.
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- Crews C. E., Vines H. M., Black C. C. Postillumination burst of carbon dioxide in crassalacean Acid metabolism plants. Plant Physiol. 1975 Apr;55(4):652–657. doi: 10.1104/pp.55.4.652. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Decker J. P. A Rapid, Postillumination Deceleration of Respiration in Green Leaves. Plant Physiol. 1955 Jan;30(1):82–84. doi: 10.1104/pp.30.1.82. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Decker J. P. Comparative Responses of Carbon Dioxide Outburst and Uptake in Tobacco. Plant Physiol. 1959 Mar;34(2):100–102. doi: 10.1104/pp.34.2.100. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Forrester M. L., Krotkov G., Nelson C. D. Effect of oxygen on photosynthesis, photorespiration and respiration in detached leaves. I. Soybean. Plant Physiol. 1966 Mar;41(3):422–427. doi: 10.1104/pp.41.3.422. [DOI] [PMC free article] [PubMed] [Google Scholar]