Étude cytologique de l'effet de l'éthéphon sur la texture des cerises Bigarreau-Napoléon

Abstract

This study presents a comparison between tissues of treated and nontreated Bigarreau-Napoléon cherries using physiochemical and cytological tests. Ethephon provokes a cell wall destructuration greater in the mesocarp tissue than in the under-peduncular area. It consists of breakage or an enlargement of some cell walls with the formation of a hydrated pectin network. Ethephon induces a cell wall catabolism characteristic of a fast cell wall senescence.Key words: Ethephon, ethylene, Bigarreau-Napoléon cherries, cell wall alterations, mechanical harvest.

ETHREL STIMULATION OF INFLORESCENCE SAP FLOW IN TAPPED COCONUT (COCOS NUCIFERA) PALMS

“…It is readily absorbed by the plant and releases ethylene slowly by a chemical reaction that allows the hormone to exert its effects. Ethrel is used routinely for regulating many physiological processes such as the latex flow of tapped rubber (Hevea brasiliensis) trees (Waidyanatha and Angammana, 1981), production of oleo-gum resin in Commiphora wightii (Bhatt et al, 1989), oil yield in Cymbopogon martinii (Srivastava et al, 1998), flower and fruit development (Farmahan and Dhiman, 1998), fruit ripening (Pal, 1998), hydration of pectic network (Batisse et al, 1998), simultaneous stimulation of longitudinal growth and lateral expansion of oat mesocotyls (Nishizawa and Suge, 1995) and reducing callose (a polysaccharide formed of β-D-glucopyranose residues linked together by β-1-3-glycosidic linkage) formation in Phaseolus vulgaris (Scott et al, 1967;Abeles and Forrence, 1970).…”