乙酰水杨酸对夜间亚低温番茄幼苗抗寒性的影响

Effects of Acetyl Salicylic Acid on Cold Resistance of Tomato Seedlings Under Sub-low Nighttime Temperature

为了使番茄在北方设施栽培中能更好的适应早春夜间亚低温的环境,选用‘辽园多丽’(耐寒品系)和‘丽佳大粉’(冷敏品系)2个番茄品系幼苗为试验材料,当番茄幼苗长至2叶1心期喷施不同浓度的乙酰水杨酸(ASA),通过测定番茄叶片丙二醛含量,电导率值以及脯氨酸含量,探讨外源ASA在夜间亚低温9℃胁迫下对番茄幼苗的影响。结果表明:‘辽园多丽’番茄品系40mg/L的外源ASA和‘丽佳大粉’番茄品系120mg/L的外源ASA可用于番茄幼苗的夜间亚低温防御,对低温胁迫幼苗起保护作用。所以,在番茄幼苗2叶1心期喷施最佳浓度的ASA,可以减少夜间亚低温对番茄幼苗的伤害,从而提高番茄幼苗抵御低温的能力。

To enhance adaptability of tomatoes cultivated in the north to the sub-low nighttime temperature in early spring,＇Liaoyuanduoli＇（cold-resistant strains） and＇Lijiadafen＇（cold-sensitive strains） tomato strains seedlings were chose as experimental material.The effects of exogenous acetyl salicylic acid（ASA） on tomato seedlings at sub-low nighttime temperature of 9℃ were observed by determining the malondialdeyde content,conductivity and proline concent of tomato leaves,which was carried out by spraying ASA of different concentrations on the leaves when the tomato seedlings was in the phase of two leaves and one heart.Exogenous acetyl salicylic acid of＇Liaoyuanduoli＇tomato strains 40 mg/L and＇Lijiadafen＇tomato strains 120 mg/L may help to resist the sub-low temperature,protecting tomato seedlings from threatens of low temperature.Therefore,when the tomato seedlings are in the phase of two leaves and one heart,the spraying of acetyl salicylic acid of a optimal concentration can reduce the damage of sub-low nighttime temperature to tomato seedlings,improving the cold-resistance of tomato seedlings.