STUDIES ON THE EMBRYOGENESIS OF HYBRIDS BETWEEN WHEAT AND BARLEY Ⅲ.ACCUMULATION AND MOVEMENT OF STARCH DURING EMBRYOGENESIS OF HYBRIDS BETWEEN WHEAT AND BARLEY

The accumulation of starch and its movement in various parts of the pistil of hybrids between wheat and barley during its embryogenesis has been observed, The results are summarized as follows:1. The tendency of accumulation and movement in the ovary wall and the embryo sac during the early development of the hybrid embryo and endosperm is similar to that of the selling of wheat made by other authors.2. When the endosperm cell is full of embryo sac and the embryo does not differentiate,there is very little starch in the ovary wall. When the endosperm disintegrates, starch nearly disappears in the ovary wall. It is thus obvious that the rapid disappearance of the heavy starch deposit in the ovary wall coincides with the rapid abortion of the endosperm.3. Stagnation and obortion of the embryo sac development are closely related to the normal supply of food to the embryo sac from the ovary wall.4. The style, integument, nucellus, synergid and antipodal cell lack starch in the entire coarse of the hybrid embryo and endosperm development, The synergid embryo also lacks starch just as the synergid does.