%0 Journal Article
%T Las ¦Â-Galactosidasas y la din¨¢mica de la pared celular
%A P¨¦rez-Almeida
%A Iris
%A Carpita
%A Nicholas C
%J Interciencia
%D 2006
%I Interciencia Association
%X the cell wall is the major determinant of plant cell growth and development. upon a framework of cellulose, in most flowering plants, there are many cross-linking glycans and pectins whose composition and interactions are involved in wall dynamics during growth. the monosaccharide galactose is a key constituent of major non-cellulosic polysaccharides in most plant cell walls: fucogalacto-xyloglucans, (1¡ú3), (1¡ú6)¦Â-d-galactan chains of the type ii arabinogalactan-proteins, (1¡ú4)¦Âd-galactans and related type i arabinogalactans. each of them exhibits a different turnover at specific stages of cell growth and development. for instance, alterations in cell wall assembly or remodeling through hydrolysis of galactosides and galactans in the cell wall, pre-stages certain developmental events, such as the onset of fruit ripening and the initiation of fiber bundles in flax. no endo-galactanases have been found in plants; therefore, exo-galactanases/¦Â-galactosidases are held responsible for the hydrolysis of all cell-wall galactose-containing polymers. the purpose of this paper is to review cell wall galactose-containing polymers and to better understand the biological role of the plant ¦Â-galactosidases in the context of the dynamics during cell growth.
%K galactanos
%K galactosa
%K -galactosidasas
%K pared celular .
%U http://www.scielo.org.ve/scielo.php?script=sci_abstract&pid=S0378-18442006000700004&lng=en&nrm=iso&tlng=en