A xyloglucan in etiolated seedlings of Pinus radiata

amidon arbre forestier cell walls chemical composition chemical structure composition chimique cotiledones cotyledons crecimiento croissance etapas de desarrollo de la planta fisiologia vegetal forest trees glucane glucanos glucans glucomannans growth hemicellulose hemicelulosa hipocotilos hypocotyle hypocotyls mananos mannane mannans pared celular paroi cellulaire pentosane pentosanos pentosans pinus radiata plant developmental stages plant physiology plantule polyholoside polysaccharides seedlings starch structure chimique xilanos xylane xylans