Title: Effect of Water Stress and Ethylene on Osmoregulation in the Subhook Region of Pea Epicotyls
Abstract: Possible involvement of ethylene in osmoregulation under water stress was studied. Osmotic stress caused by 100 mM mannitol increased osmotic concentration of cell sap in the subhook region of the second internode of pea cuttings. Either exogenous ethylene or ACC (1-aminocyclopropane-1-carboxylic acid) increased osmotic concentration. The increase in the osmotic concentration was well correlated with the amount of ethylene released from ACC-treated cuttings, suggesting that osmotic concentration is under the control of the endogenous level of ethylene. Mannitol treatment increased the concentration of both soluble sugars and potassium ions in cell sap obtained from the subhook region, while ethylene treatment increased only the concentration of soluble sugars. Neither osmotic stress caused by mannitol nor drought stress stimulated ethylene production in pea cuttings. These results suggest that in the subhook region of the pea second internode, ethylene is not the effector in osmoregulation under water stress.
Publication Year: 1987
Publication Date: 1987-01-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 9
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