title: Effects of pH and Ethephon on Betacyanin Leakage from Beet Root Discs.
abstract: Betacyanin leakage from beet root discs was found to increase with decreasing pH of the incubation medium. Although 10 millimolar Ca(2+) reduced pigment leakage at pH 3.5, it was ineffective at pH 2.3. Leakage was also stimulated by 100 micrograms per milliliter (2-chloroethyl)-phosphonic acid (pH 3.1), but when the solution was neutralized, this leakage was eliminated. Bubbling C(2)H(4) through a neutral medium containing beet discs had no effect on pigment leakage; it appears that the effect of Ethephon solutions on this process is a function of their low pH.
authors: Department of Environmental Horticulture, University of California, Davis, California 95616.
authors: M S
authors: MS
authors: Reid
authors: J L
authors: JL
authors: Paul
authors: R E
authors: RE
authors: Young