玉米和许多其它暖季作物一样对5～15℃的发芽温度反应敏感,并且存在品种间差异(Cal等,1972)。尽管把吸脓冷害主要归因于原生质膜的破损(Pollock等,1966;Brainlage等,1978)。但Franks(1983)指出,原生质膜可能不是受冷害的唯一部位。无论伤害的最初场所是哪个部位,各种研究已表明发 Like many other warm-season crops, maize is responsive to the germination temperature of 5-15 ° C and there are differences among breeds (Cal et al., 1972). Although choking of aspirates is largely due to damage of the plasma membrane (Pollock et al., 1966; Brainlage et al., 1978). But Franks (1983) pointed out that the plasma membrane may not be the only site affected by chilling injury. Regardless of the site where the injury first occurred, various studies have shown that it is fatal