Original research articles

Electronic microscopy examination of the influence of purified enzymatic activities on grape skin cell wall


Pectolytic enzymes act differently on the degradation of the cell wall of grape skin and on the libération of tannins. PG and PL degrade the pectin from the middle lamella and the primary wall which favours the liberation of granulate tannins present inside the vacuole only ones. Cellulase degrade the cellulose fibbers and allows the liberation of tannins bound to the cellular wall. These last ones being bound to cellulosic molecules.


Khalid Amrani Joutei


Affiliation : Laboratoire de biotechnologie végétale, Faculté des Sciences et techniques Saïss, B.P. 2202, route d'Imouzzer

F. Ouazzani Chahdi

Affiliation : Faculté des sciences et techniques Saïss Fès, Maroc

D. Bouya

Affiliation : Faculté des sciences Dhar El Mehraz, Fès, Maroc

Cédric Saucier

Affiliation : Faculté d’oenologie de Bordeaux, 351 cours de la Libération, 33405 Talence cedex, France

Yves Glories

Affiliation : Faculté d’OEnologie, Université Victor Segalen Bordeaux 2, 351, cours de la libération, 33405 Talence cedex, France


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