Involvement of cell wall characteristics in growth processes along the mung bean hypocotyl

• Published in: Plant and cell physiology 1982-10, Vol.23 (7), p.1145-1154
• Main Authors: Goldberg, R, Prat, R. (Pierre Univ., Paris (France))
• Format: Article
• Language: English
• Subjects: ABONOS; ABONOS VERDES; ADDITIF; ADDITIF ALIMENTAIRE; ADDITIVES; ADITIVOS; ADITIVOS ALIMENTARIOS; AGENT DE TEXTURE; AGRICULTURAL CHEMICALS; ALIMENTOS; AMENDEMENT DU SOL; BIOLOGICAL DEVELOPMENT; CARBOHIDRATOS; CARBOHYDRATES; CELL STRUCTURE; CELL WALLS; COMPOSE ORGANIQUE; COMPUESTOS ORGANICOS; COVER PLANTS; CRECIMIENTO; CROISSANCE; CROPS; CULTIVOS; CULTIVOS DE GRANO; DESARROLLO BIOLOGICO; DEVELOPMENTAL STAGES; DEVELOPPEMENT BIOLOGIQUE; ECONOMIC PLANTS; ENGRAIS; ENGRAIS ORGANIQUE; ENGRAIS VERT; ENMIENDAS DEL SUELO; ENZIMAS; ENZYME; ENZYMES; ESTABILIZADORES; ESTRUCTURA CELULAR; ETAPAS DE DESARROLLO; ETAPAS DE DESARROLLO DE LA PLANTA; FEED CROPS; FEED LEGUMES; FERTILIZANTES; FERTILIZERS; FISIOLOGIA; FONCTION PHYSIOLOGIQUE; FOOD ADDITIVES; FOODS; FRIJOL MUNGO; FUNCION FISIOLOGICA; Glucanases; GLUCANE; GLUCANO; GLUCANS; GLUCIDE; GRAIN CROPS; GRAIN LEGUMES; GREEN MANURES; GROWTH; HARICOT DORE; HIDROLASAS; HIPOCOTILOS; HORTALIZAS (PLANTAS); HORTALIZAS LEGUMINOSAS; HYDROLASE; HYDROLASES; HYPOCOTYLE; HYPOCOTYLS; LEGUMES; LEGUMINEUSE; LEGUMINEUSE A GRAINS; LEGUMINEUSE FOURRAGERE; LEGUMINEUSE LEGUMIERE; LEGUMINOSAS; LEGUMINOSAS DE GRANO; LEGUMINOSAS FORRAJERAS; MANURES; Mung bean (Vigna radiata); MUNG BEANS; ORGANIC COMPOUNDS; PARED CELULAR; PAROI CELLULAIRE; PECTINAS; PECTINE; PECTINS; PHYSIOLOGICAL FUNCTIONS; PHYSIOLOGIE; PHYSIOLOGY; PLANT DEVELOPMENTAL STAGES; PLANTAS; PLANTAS DE COBERTURA; PLANTAS DE VALOR ECONOMICO; PLANTAS FORRAJERAS; PLANTAS PROTECTORAS; PLANTE; PLANTE A GRAINS; PLANTE D'INTERET ECONOMIQUE; PLANTE DE COUVERTURE; PLANTE DE CULTURE; PLANTE DE PROTECTION; PLANTE FOURRAGERE; PLANTE LEGUMIERE; PLANTS; PLANTULAS; PLANTULE; POLISACARIDOS; POLYHOLOSIDE; POLYSACCHARIDES; PRODUCTOS QUIMICOS AGRICOLAS; PRODUIT AGROCHIMIQUE; PRODUIT ALIMENTAIRE; PROTECTIVE PLANTS; SEEDLINGS; SOIL AMENDMENTS; STABILIZERS; STADE DE DEVELOPPEMENT; STADE DE DEVELOPPEMENT VEGETAL; STRUCTURE CELLULAIRE; VEGETABLE CROPS; VEGETABLE LEGUMES
• ISSN: 0032-0781; 1471-9053
• DOI: 10.1093/oxfordjournals.pcp.a076455

To detect the cell wall characteristics involved in the regulation of growth responses, the composition of wall polysaccharides and the kinetic behaviour of wall-bound glucanases on mung bean hypocotyls were investigated. In the parts of the hypocotyl located below the “elongation zone”, relationships have been shown between the characteristics of pectins and the first phase of auxin- or acid-induced growth responses. Only small pectic molecules with a low calcium content, are compatible with acid-induced wall loosening. The breakage of acid-labile bonds between uronide chains and hemicelluloses is believed to be responsible for the early burst of growth. In young tissues, acid-induced modifications in the cell wall structure might then produce changes in the kinetic behaviour of cell wall polysaccharidases that depend on this structure for support. In old tissues, the number of glycosyl linkages is not sufficient to permit glucanase activities. Enzymatic rupture of covalent bonds may indeed regulate the supply of wall material requisite for sustained growth.