冻害:气温下降至冰点以下,植物内部发生结冰而受害的现象,可称冻害。 当气温缓慢下降至冰点以下时,由于细胞间隙内的溶液浓度低于细胞浓度,因此在细胞间隙内往往先形成冰晶体,而使细胞间隙中未冰冻的溶液浓度变得高于细胞液。结果引起细胞内的水分外渗,并在细胞间隙部分继续形成冰晶体。这样就使细胞液浓度因不断失水而增 Frost damage: the temperature dropped below the freezing point, the occurrence of freezing within the plant and the phenomenon of suffering, can be said frost damage. When the temperature drops slowly below the freezing point, ice crystals tend to be formed in the intercellular space as the concentration of the solution in the intercellular space is below the cell concentration, leaving the concentration of unfrozen solution in the intercellular space higher than that of the cytosol. The result is extravasation of water within the cell and the continued formation of ice crystals in the intercellular space. This increases the concentration of cellular fluid due to constant water loss