Plant Physiol.
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Plant Physiology 49:490-496 (1972)
© 1972 American Society of Plant Biologists

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Heichel, G. H.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Heichel, G. H.
Agricola
Right arrow Articles by Heichel, G. H.
Articles

Postillumination Respiration of Maize in Relation to Oxygen Concentration and Glycolic Acid Metabolism

G. H. Heichel

a Department of Ecology and Climatology, The Connecticut Agricultural Experiment Station, New Haven, Connecticut 06504

Prior illumination in CO2-free air enhances a respiration from maize (Zea mays L.) leaves different in onset and duration from the postillumination burst of photorespiration. The course of respiration after brief illumination of attached leaves was measured as CO2 efflux in darkness into CO2-free atmospheres with four O2 concentrations. The peak of CO2 efflux following illumination was suppressed by 2.23% O2, was completely eliminated by 0.04% O2, and was not stimulated by 40% O2 compared with air. Compared with air, steady dark respiration was suppressed by 0.04% O2 but was not affected by 2.23% nor 40% O2. Excision and subsequent uptake of distilled water through the vascular system nearly eliminated the enhanced respiration.

Several metabolites fed to excised leaves through the vascular system during illumination doubled or tripled the respiration of maize in darkness. The sensitivity to 2.23% O2 of the respiration of glycolic acid in the dark imitated the sensitivity to O2 of attached leaves.

The respiration of glycolic acid was inhibited by {alpha}-hydroxy-2-pyridinemethanesulfonate.

While attached leaves and leaves fed glycolic acid both released little CO2 into CO2-free air in bright light, declining illuminance caused a larger and prompter CO2 efflux from leaves fed glycolic acid than from attached leaves. Leaves fed glycolic acid plus 3-(p-chlorophenyl)-1, 1-dimethyl urea released more CO2 into CO2-free air in bright light than did controls fed glycolic acid.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
ASPB Publications PLANT PHYSIOLOGY THE PLANT CELL
Copyright © 1972 by the American Society of Plant Biologists