3.板栗果实发育的细胞学观察。板栗果实在发育过程中栗苞和子房大小变化随

3. Cytological observation of chestnut fruit development. During the development of chestnut fruit, the size of chestnut bud and ovary increased with the increase of time, showing an "S" curve. With the development of the ovary, the endosperm cells also go through the cellularization period, differentiation period and death period during the process of the original embryo developing into globular embryo, heart-shaped embryo, torpedo-shaped embryo, cotyledon-shaped embryo and mature embryo, which indirectly proves During the mature embryo stage, endosperm cells do not exist in the embryo. With the development of the embryo, the nutrient protein starch, protein, and polysaccharides in the embryo show an increasing trend. In the nutrient positioning of the embryo development process, starch is mainly located in the outer integument cells, polysaccharides are mainly in the inner integument cells, and the inner and outer integuments. There are almost no protein particles in the quilt. With the development of the seed kernel, the starch grains in the cotyledons gradually became larger in volume and the density increased. The area, major axis and minor axis of the starch grains showed an "S" curve. The above are the cytological characteristics of chestnut fruit development.

3. Cytology observation of chestnut fruit development. Chestnut fruit really increases with time during the development of chestnuts and sub-rooms, showing an "S" curve. With the development of the sub-room, in the process of developing the original embryo into a spherical embryo, a heart-shaped embryo, a torpedo-shaped embryo, a sub-leaf embryo to a mature embryo, the endosperm cells also go through the cellization period, differentiation period and death period, which indirectly proves that the mature embryo period, there is no endosperm cells in the embryo. With the development of the embryo within the nutrient protein starch, protein, polysaccharine increase trend, in the embryo development process of nutrient positioning starch is mainly located in the outer bead cells, polysaccharine main inner beads are cells, and the inner beads are almost invisible protein particles. The area, long axis and short axis changes of starch grains in the developing sub-leaf with seed kernels gradually become larger and denser, and the change of the long and short shafts is "S" curved. These are cytological features of chestnut fruit development.

3. Cytological observation of chestnut fruit development. During the development of chestnut fruit, the size of chestnut bract and ovary increased with the increase of time, showing a "s" curve. With the development of ovary, in the process of proembryo developing into globular embryo, heart-shaped embryo, torpedo shaped embryo, cotyledon shaped embryo to mature embryo, endosperm cells also went through the period of cellization, differentiation and death, which indirectly proved that endosperm cells did not exist in mature embryo. With the development of embryo, the contents of protein, starch, protein and polysaccharide increased. In the process of embryo development, starch was mainly located in the outer integument cells, polysaccharide was mainly located in the inner integument cells, and protein particles were almost invisible in the inner and outer integuments. With the development of seed kernel, the starch grains in cotyledons gradually increased in volume and density, and the changes of starch grain area, long axis and short axis showed "s" curve. These are cytological characteristics of chestnut fruit development.<br>