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Plant Physiology 57:115-121 (1976)
© 1976 American Society of Plant Biologists

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Abscisic Acid Content and Stomatal Sensitivity to CO2 in Leaves of Xanthium strumarium L. after Pretreatments in Warm and Cold Growth Chambers 1

Klaus Raschke, Margaret Pierce and Chu Chen Popiela

a Michigan State University/Energy Research and Development Administration Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48824

The degree of stomatal sensitivity to CO2 was positively correlated with the content of abscisic acid of leaves of Xanthium strumarium grown in a greenhouse and then transferred for 24 hours or more to a cold (5/10 C, night/day) or a warm growth chamber (20/23 C). This correlation did not exist in plants kept in the greehouse continuously (high abscisic acid, no CO2 sensitivity), nor in plants transferred from the cold to the warm chamber (low abscisic acid, high CO2 sensitivity). The abscisic acid content of leaves was correlated with water content only within narrow limits, if at all. At equal water contents, prechilled leaves contained more abscisic acid than leaves of plants pretreated in the warm chamber. There appear to be at least two compartments for abscisic acid in the leaf.

1 Work was supported by the United States Energy Research and Development Administration (formerly Atomic Energy Commission) under Contract No. AT(11-1)-1338.




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M. Doi and K.-i. Shimazaki
The Stomata of the Fern Adiantum capillus-veneris Do Not Respond to CO2 in the Dark and Open by Photosynthesis in Guard Cells
Plant Physiology, June 1, 2008; 147(2): 922 - 930.
[Abstract] [Full Text] [PDF]


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ASPB Publications PLANT PHYSIOLOGY® THE PLANT CELL
Copyright © 1976 by the American Society of Plant Biologists