Ethylene biosynthesis in tissues of young and mature avocado fruits

摘要: Sitrit, Y., Blumenfeld, A. and Riov, J. 1987. Ethylene biosynthesis in tissues of young mature avocado fruits. Avocado (Persea americana Mill.) fruit differ greatly their capability to pro duce wound ethylene. In fruitlets, the endosperm lacks ability produce ethylene because no 1-aminocyclopropane-1-carboxylic acid (ACC) is synthesized activity ethylene-forming enzyme (EFE) present. The cotyledons (embryo) do not significant amounts at any developmental stages fruits, although both fruits they contain a relatively high level ACC synthase (EC 4.4.1.-) activity. Because very low EFE present cotyledons, most formed this tissue conjugated. Of various fruitlet tissues, seed coat has highest potential This due particularly Also, sensitive autocatalytic effect Fruitletpericarp possesses lower than coat. Towardruit maturiy, disappears shrivels dies so that pericarp remain as only active fruit. At stage, producing Mature precli macteric pericarpThe role regulating physiological processes different maturation discussed.