A large number of tannin cells with different shape exist mainly in mesocarp which were about times bigger than those o在果实中的单宁细胞主要存在于中果皮内,少数存在于外果皮中,内果皮没有单宁细胞; 中果皮的单宁细胞无论何种形状,均较外果皮中形状相似的单宁细胞大倍左右;