Abstract
SummaryIn the basic constituent tissues (coat, endosperm and embryo) of the developing ovule (proembryo and embryo stages) the following gradients were found: of osmotic value, concentration of non reducing sugars, respiration rate and concentration of amino-N. Virtually these gradients in the coat, endosperm and partly in the embryo itself were directed from the chalaza to the micropyle i.e. in the opposite direction of the embryo elongation (micropyle → chalaza). The direction of some gradients in the endosperm, embryo and possibly in the coal changes during the ovule development.
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