RT Journal Article SR Electronic T1 Changes in the Pattern of Isoperoxidases during Maturation of Grape Berries CV Gulabi as Affected by Ethephon (2-Chloroethyl) Phosphonic Acid JF American Journal of Enology and Viticulture JO Am J Enol Vitic. FD American Society for Enology and Viticulture SP 275 OP 277 DO 10.5344/ajev.1979.30.4.275 VO 30 IS 4 A1 Sunita Kochhar A1 V. K. Kochhar A1 S. D. Khanduja YR 1979 UL http://www.ajevonline.org/content/30/4/275.abstract AB Peroxidase activity in Gulabi berries increased sharply beginning six weeks after anthesis. The increase was greater with ethephon treatment as compared to the untreated control and was in proportion to the concentration used. Peroxidase activity in untreated berries was associated with two isoenzymes. In ethephon-treated berries two new isoenzymes at Rf 0.68 and 0.75 appeared 8 and 10 weeks after anthesis.