Agronomy Journal Grow Your Career With ASA
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Published online 1 September 1975
Published in Agron J 67:629-632 (1975)
© 1975 American Society of Agronomy
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 Bielorai, H.
Right arrow Articles by Hopmans, P. A. M.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Bielorai, H.
Right arrow Articles by Hopmans, P. A. M.
Agricola
Right arrow Articles by Bielorai, H.
Right arrow Articles by Hopmans, P. A. M.

Recovery of Leaf Water Potential, Transpiration, and Photosynthesis of Cotton During Irrigation Cycles

H. Bielorai and P. A. M. Hopmans1

The ability of a plant to recover from temporary and/or prolonged stress and the rate of recovery are of great importance in crop production. However, the information available on this subject is relatively scarce. A study was conducted to evaluate the recovery of irrigated cotton (Gossypium hirsutum L. ‘Acala 15–17’) following soil moisture stress of various durations through the measurements of soil moisture stress ({Psi}s) using 1) the soil-moisture retention function, leaf water potential ({Psi}l), by pressure bomb, and 2) leaf diffusion resistance (Rl), by diffusive resistance porometer. Photosynthesis was measured by an infrared gas analyzer, and transpiration by weighing. The experiment was conducted in a controlled climate room. Leaf water potential ({Psi}l) was linearly related to that in the soil ({Psi}s) ({Psi}l = 0.609 {Psi}s – 9.77 atm). Diffusion resistance of the leaves showed a curvilinear dependence on {Psi}s with a marked inflection between –10 and –14 atm. Neither leaf resistance nor transpiration fully returned to pre-stress conditions after irrigation, and even the partial recovery required several days. Continuous measurements of net photosynthesis also showed a delayed and only partial recovery from soil water stress. It is concluded that the observed reduction in dry matter increase is due mainly to the failure in net photosynthesis recovery after re-irrigation.

Key Words: Dry matter • Leaf area • Soil water potential ({Psi}s) • Leaf diffusion resistance (Rl) • Leaf temperature

1 Senior irrigation scientist, The Volcani Center. Bet Dagan, Israel, and senior plant ecophysiologist, Dep. of Horticulture. Agricultural Univ., Wageningen, both during the described research seconded to the Institute for Land and Water Management Research, Wageningen, The Netherlands.

Received for publication August 10, 1974.




HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
The SCI Journals Crop Science 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 © 1975 by the American Society of Agronomy.