板栗果实在发育过程中栗苞和子房大小变化随时间的增加而增加，呈“S”曲线

During the development of chestnut fruit, the size of chestnut bud and ovary increased with the increase of time, showing an "S" curve. And the fruit development period is generally from July to August, and the mature period is in September. After the original embryo, it is a globular embryo at 28-35d after the full blooming period, a heart-shaped embryo at 35-40d after the full blooming period, and a torpedo-shaped embryo at 40-42d after the full blooming period. , 42-49d after the full flowering stage, the embryo is a cotyledon-shaped embryo, 104d after the full flowering stage, the embryo matures and forms a seed kernel. In the process of embryo development, endosperm cells also undergo cellularization, differentiation, and death, which indirectly proves that there are no endosperm cells in the embryo during the mature 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 beads. There are almost no protein particles in the quilt. With the development of the seed kernel, the starch grains in the cotyledons gradually increased in volume and density, and the embryo development to 51d was the early stage of starch formation, the period from 58-94d was the critical period for the formation of chestnut starch; after 94, it entered the late stage of starch granule formation.

Chestnut fruit really increases with time during the development of chestnuts and sub-rooms, showing an "S" curve. And the fruit development period is generally in July-August, the ripening period in September, after the original embryo bloom period 28-35d for the spherical embryo, the flowering period 35-40d for the heart-shaped embryo, after the flowering period 40-42d for the torpedo-shaped embryo, after the flowering period 42-49d for the child leaf-shaped embryo, after the flowering period 104d embryo mature, forming a species of kernels. In the process of embryo development, 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 starch grain in the developmental leaf of the seed benevolent gradually increased in volume and density, and the embryo development to 51d was the initial stage of starch formation, and the period of 58-94d was the key period of chestnut starch formation;

During the development of chestnut fruit, the size of chestnut bract and ovary increased with the increase of time, showing a "s" curve. And the fruit development period is generally from July to August, and the mature period is in September. After the proembryo, the spherical embryo is 28-35 days after the full bloom, the heart-shaped embryo is 35-40 days after the full bloom, the torpedo shaped embryo is 40-42 days after the full bloom, the cotyledon shaped embryo is 42-49 days after the full bloom, and the embryo matures 104 days after the full bloom. The endosperm cells also went through the stages of cell transformation, differentiation and death during embryo development, which indirectly proved that there was no endosperm cells 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 early stage of starch formation was 51 days after embryo development, the key stage of starch formation was 58-94 days, and the late stage of starch formation was 94 days later.<br>