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为明确钙对番茄耐弱光特性的调控作用,以番茄(Lycopersicon esculentum Mill)耐弱光品系W为试材,研究了弱光(50%自然光强)胁迫条件下,钙和钙加IAA处理对叶片保护酶活性以及可溶性蛋白含量的调控作用。结果表明:弱光胁迫下(实测光通量密度为556.8～656.6μmol.m-2·s-1)27mmol·L-1的CaCl2处理可显著降低番茄叶片MDA含量,提高SOD、CAT和POD的活性及可溶性蛋白含量,使这些指标达到正常光照下的对照植株水平;IAA进一步增强了Ca2+的这些作用。Ca2+的这些作用可能是其提高番茄植株弱光耐受性,防止植株弱光伤害的重要原因之一。
In order to clarify the regulatory effect of calcium on low light tolerance of tomato, Lycopersicon esculentum Mill was used to study the effects of calcium and calcium supplemented with IAA under weak light (50% natural light) Regulation of leaf protective enzyme activity and soluble protein content. The results showed that the CaCl2 treatment of 27mmol·L-1 under low light stress (measured light flux density of 556.8 ~ 656.6μmol.m-2 · s-1) could significantly reduce the MDA content of tomato leaves and increase the activities of SOD, CAT and POD and Soluble protein content, these indicators reached the level of control plants under normal light; IAA further enhances these effects of Ca2 +. These effects of Ca2 + may be one of the important reasons for improving the poor light tolerance of tomato plants and preventing weak light damage of the plants.