SNIR, I., Division of Plant Physiology, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel
KESSLER, B., Department of Life Sciences, Bar-Ilan University, Ramat Gan, Israel

Ethidium bromide, a DNA intercalating agent, acts synergistically with gibberellin on the elongation of cucumber seedling hypocotyls at concentrations of 0.05 and 1.0 μg per plant. At higher concentrations and when given prior to the GA treatment, ethidium bromide acts antagonistically with gibberellin. Copyright © 1975, Wiley Blackwell. All rights reserved