摘要
[Objective] This study aimed to inveseigate the effects of chitosan on physiological characteristics of tomato seedlings under salt stress. [Method] Under salt stress of 200 mmol/L NaCI, foliar spraying induction method was used to explore the physiological role of chitosan in salt resistance of tomato seedlings with a concentration of 150 mg/L [Result] Chlorophyll content, free proline content, SOD activity and CAT activity of tomato seedlings treated with CTS ＋ salt stress increased by 26.8%, 10.7%, 10% and 58.3%, respectively, compared with that in salt stress treatment group, while MDA content had decreased by 62.5%. [Conclusion] Chitosan could delay the decline of chlorophyll content, reduce membrane lipid peroxidation, improve osmotic adjustment ability of cells, enhance the activity of protective enzyme and improve the physiological synergisms on salt resistance of tomato seedlings.
[目的]研究壳聚糖对盐胁迫下番茄幼苗生理生化指标的影响。[方法]在200mmol/LNaCl胁迫下用叶面喷洒的诱导方法探讨150mg/L壳聚糖对番茄幼苗的抗盐生理作用。[结果]壳聚糖处理后比盐胁迫处理的叶绿素含量、游离脯氨酸含量、SOD活性、CAT活性分别提高了26.8%、10.7%、10%、58.3%,MDA含量下降了62.5%。[结论]壳聚糖可以延缓盐胁迫下叶绿素含量的下降、降低细胞膜脂过氧化作用、提高细胞的渗透调节能力、可以提高保护性酶的活性,提高番茄幼苗抗盐的协同生理作用。
