钙能使细胞膜保持稳定,增强膜抵抗不良环境的能力,如PH值过低,温度过高,冻害,缺氧,有毒离子浓度过高等。钙能减少苹果成熟过程中膜的透性,使膜内物质不易漏出,防止组织发生溢流现象。它还能通过酶调节苹果的某些代谢途径,使呼吸率下 Calcium can make the cell membrane remain stable, enhance the ability of the membrane to resist the adverse environment, such as PH value is too low, the temperature is too high, frost damage, hypoxia, toxic ion concentration is too high. Calcium can reduce the permeability of the membrane in the ripening process of apple, so that the material in the membrane can not easily leak out and prevent the overflow of the tissue. It also regulates some of the metabolic pathways in the apple by the enzyme so respiration rate