水杨酸对草莓幼苗抗热性的影响

Effects of Salicylic Acid( SA) on Heat Resistance of Strawberry Seedlings

[目的]探讨不同浓度水杨酸对草莓幼苗抗热性的影响,为水杨酸作为抗旱剂在草莓生产方面提供依据。[方法]采用不同浓度的水杨酸(0、0.5、1.0、2.0、4.0、8.0 mmol/L)在草莓缓苗以后,选取相同生长部位、大小相近的草莓叶片进行叶面喷施处理。[结果]水杨酸能有效提高草莓的抗热性,在40℃的高温下,与CK处理组比较,水杨酸处理能有效提高叶绿素含量,减少组织水分散失,增强过氧化物酶活性,降低丙二醛含量,减小质膜透性。[结论]以2.0 mmo L/L的浓度处理效果最佳。

[ Objective] To study effects of different concentration salicylic acid on heat resistance of strawberry seedlings, which will provide basis for application of salicylic acid as drought resistance agent in strawberry production. [ Method ] Using different concentration salicylic acid （0, 0.5, 1.0, 2.0, 4.0, 8.0 mmol/L）, after strawberry slow seedlings, leaf spraying treatment was conducted on similar size strawberry leaves. [ Result ] Experimental results show that the salicylic acid can improve strawberry resistance to heat, under the high temperature of 40 ℃, chlorophyU content increased, tissue moisture loss reduced, peroxidase activity strengthened, MDA content decreased, permeability of plasma membrane reduced. [ Conclusion] 2.0 mmol/L salicylic acid treatment has the best effect.