Abstract
In excised embryos of Fraxinus ornus, the first macroscopic sign of germination is a curvature near the root apex. Histological studies show that this curvature is due to cell elongation on the convex side and is accompanied by cell division. Metabolic changes, manifested by the disintegration of protein bodies and tissue differentiation, also occur during this time. In embryos treated with phleomycin cell division is completely inhibited but elongation, root hair formation, disintegration of protein bodies, and differentiation are still detectable. Phleomycin also drastically inhibits the formation of chlorophylls and the fresh weight increase of embryos.
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Selected References
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