Figure 3.

Specific activities of xyloglucan hydrolases in attached (A, C, and E; legends at E) and detached cotyledons (B, D, and F; legends at F) of H. courbaril during seedling development. The attached cotyledons used were from seedlings grown under control conditions (control), in the darkness. or with shoot excised above the cotyledons insertions (shoot excised). The detached cotyledons were taken from developing seedlings at 19, 34. and 41 d and kept in water in the darkness or in 10⁻⁶ m 2,4-D (41 d only). A and B, XEH. C and D, β-glucosidase. E and F, β-galactosidase. The activities detected in attached cotyledons (control) were added to each graph as a reference. Bars represent sd of the mean of three composed replicates.