1. Stage 3 is the notable enlargement of mesocarp cells whose radical elongation is more obvious.

2. The results showed that the Ca content in mesocarp parenchyma cells of calcium deficient peanuts was absent, "filling matter" was little and breakable.

3. Tannin cells exist in mesocarp as individuals or bundle and gobbet in some cultivars.

4. This paper investigated microcosmic structure of peanut's mesocarp and physiological and biochemical reaction under Ca stress through pot experiment.

5. The mesocarp was the main part of pericarp, and the cell of endocarp was small and transparent in early stage, and it became into hard shell that was made of lignification stone cells.

6. The results indicated that fruit enlarging and thick of the middle part of mesocarp were increased by grafting.

7. A story endocarp may or may not become free from the mesocarp.

8. Corneous stratum of pericarpial surface and stratum of phellem in mesocarp block badly seminal sopping.