S. Mutaftschiev et al., RELATIONSHIPS BETWEEN CELL-WALL BETA-1,3-ENDOGLUCANASE ACTIVITY AND AUXIN-INDUCED ELONGATION IN MUNG BEAN HYPOCOTYL SEGMENTS, Protoplasma, 199(1-2), 1997, pp. 49-56
A beta-1,3-endoglucanase (mol. wt. 43,000 and pI around 7) was immunol
ocalized in outer epidermal cell walls and pericycle walls in the elon
gation zone of mung bean hypocotyls. Hypocotyl segments infiltrated wi
th anti-beta-1,3-endoglucanase antibodies show a clear reduction in th
eir auxin-induced elongation when the auxin treatment was maintained f
or a long period (15 h). These results suggest that, even in dicotyled
ons, rupture of some beta-1,3-glycosyl linkages might be associated wi
th the cell-wall loosening, which is responsible for auxin-induced elo
ngation, or that some beta-1,3-glucanases are indirectly involved in a
uxin-induced elongation through their auxin-binding properties.