Crop Science Grow Your Career with CSSA
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Published in Crop Sci 13:234-237 (1973)
© 1973 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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 Similar articles in this journal
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 Google Scholar
Google Scholar
Right arrow Articles by Akita, S.
Right arrow Articles by Moss, D. N.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Akita, S.
Right arrow Articles by Moss, D. N.
Agricola
Right arrow Articles by Akita, S.
Right arrow Articles by Moss, D. N.

Photosynthetic Responses to C02 and Light by Maize and Wheat Leaves Adjusted for Constant Stomatal Apertures1

Shigemi Akita and Dale N. Moss2

Previously we found that maize (Zea mays L.) leaf stomata were more responsive to changes in light intensity on CO2 concentration than were the stomata of wheat (Triticum aestivum L.). This study was undertaken to determine how the photosynthetic light and CO2 responses were affected by this differential stomatal sensitivity. Measurements of net photosynthesis and leaf diffusive resistances were made in various CO2 concentrations and light intensities on attached, mature leaves on 40- to 60- day-old potted maize and wheat plants grown in a glasshouse. The data for each leaf were adjusted to a constant leaf diffusive resistance according to the diffusive equation for photosynthesis as given by Gaastra.

The results showed that "apparent Km's" for CO2 response by whole maize leaves had large errors due to a changing leaf diffusive resistance as the CO2 concentration changed. The initial slope of the light response curves were greater for maize than for wheat when corrected for the changes in stomatal apertures caused by the treatment.

Key Words: Environmental responses • Stomatal physiology

1 Minnesota Agricultural Experiment Station Journal Series Paper No. 8062. Financial support for this work came in part from a Japanese Government Fellowship to the Senior Author and from Rockefeller Foundation Grant AGR 6972.

2 Visiting Scientist (Present Address: Department of Plant Physiology and Genetics, National Institute of Agricultural Sciences, Konosu, Saitama, Japan) and Professor, Department of Agronomy & Plant Genetics, University of Minnesota, St. Paul 55101.

Received for publication August 4, 1972.




HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
The SCI Journals Agronomy Journal Vadose Zone Journal
Journal of Natural Resources
and Life Sciences Education		 Soil Science Society of America Journal
Journal of Plant Registrations Journal of
Environmental Quality		 The Plant Genome
Copyright © 1973 by the Crop Science Society of America.