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Plant Physiology 57:628-631 (1976)
© 1976 American Society of Plant Biologists

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Mercury-induced Ethylene Formation and Abscission in Citrus and Coleus Explants 1

Raphael Goren and Sanford M. Siegel2

a Department of Horticulture, The Hebrew University of Jerusalem, Rehovot, Israel

Mercury vapor induces ethylene formation and abscission in Citrus and Coleus explants. Both responses are markedly greater in the absence of CO2. The stimulation of these metabolically complex processes indicates that the action of mercury vapor is not consistent with the more popular conception of mercury toxicity. This was manifested in its complete failure to disturb respiratory gas exchange, and in the total absence of any necrosis. Accordingly, the effect of mercury appears to be highly specific. The overall significance of these findings is discussed with respect to physiological, environmental, and methodological aspects.

2 Present address: Department of Botany, University of Hawaii, Honolulu, Hawaii.

1 This work was carried out during the tenure of a senior fellowship at the Weizmann Institute, Rehovot, to S.M.S.






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