Postillumination Burst of Carbon Dioxide in Crassalacean Acid Metabolism Plants 1
AUTOR(ES)
Crews, Clifton E.
RESUMO
Immediately following exposure to light, a postillumination burst of CO2 has been detected in Crassulacean acid metabolism plants. A detailed study with pineapple (Ananas comosus) leaves indicates that the postillumination burst changes its amplitude and kinetics during the course of a day. In air, the postillumination burst in pineapple leaves generally is exhibited as two peaks. The postillumination burst is sensitive to atmospheric CO2 and O2 concentrations as well as to the light intensity under which plants are grown. We propose that the CO2 released in the first postillumination burst peak is indicative of photorespiration since it is sensitive to either O2 or CO2 concentration while the second CO2 evolution peak is likely due to decarboxylation of organic acids involved in Crassulacean acid metabolism.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=541681Documentos Relacionados
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