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A conceptual model of stomatal control mechanisms
Author(s) -
Woo K. B.,
Stone L. N.,
Boersma L.
Publication year - 1966
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/wr002i001p00071
Subject(s) - guard cell , turgor pressure , transpiration , mechanism (biology) , process (computing) , biological system , environmental science , chemistry , computer science , biophysics , botany , biology , physics , photosynthesis , quantum mechanics , operating system
The stomata of plant leaves constitute a main regulating system of the transpiration process. Biologists have suggested a turgor mechanism to explain stomatal movement. The functions of the mechanism are quantitatively described by an osmotic water transfer theory and/or the active water transfer theory in the guard cells. Based on the active water transfer theory and the observations of stomatal movement under various conditions of H 2 O, CO 2 , and light, a conceptual model of the stomatal control mechanism is proposed. Transfer functions of the mechanisms characterizing the changes in turgor pressure have been derived. The entire system has been organized by the application of adaptive control system theory and has been simulated on an analog computer. The dynamic characteristics have been investigated with consideration of various environmental conditions. (Key words: Computers, analog; plants; soil moisture.)