Acid-Induced Stomatal Opening in Commelina communis and Vicia faba |
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Authors: | Jinno, Nobutaka Kuraishi, Susumu |
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Affiliation: | Department of Enviornmental Studies, Faculty of Integrated Arts and Sciences, Hiroshima University Hiroshima 730, Japan |
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Abstract: | The effects of H$ and fusicoccin (FC) on stomatal opening inthe dark were investigated using epidermal strips of Commelinacommunis and Vicia faba cv. Ryosai Issun. Citrate-phosphatebuffer induced maximal opening of stomata at pH 3.0 when testedover the range of 2.7 to 5.0. HCl at 1 mM also induced stomatalopening without appreciable accumulation of K$ in the guardcells. After 4 hr treatment with 10 µM FC, stomata openedwith concomitant accumulation of K$ in the guard cells, although12 hr treatment caused opening without concomitant K$increase. These results suggest that stomatal opening can be caused bysalt accumulation and/or changes of the physicochemical conditionsin the cell wall of the guard cells due to high acidity. 1 Present address: Biological Laboratory, Faculty of Education,Nagasaki University, Nagasski 852, Japan. (Received April 30, 1982; Accepted July 17, 1982) |
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