不同浓度的NaCl协迫对樱桃番茄幼苗生理生化指标的影响

Effects of NaCl Stress of Different Concentration on Physiological and Biochemical Parameters of Cherry Tomato Seedlings

盐害是樱桃番茄设施栽培中面临的主要问题之一。该研究以耐盐性差异显著的2个品种"京丹5号"和"小圆枣"为试材,研究了不同浓度的盐胁迫对樱桃番茄幼苗生长发育的影响,以期为樱桃番茄抗盐育种及抗盐栽培提供理论依据。结果表明:204 mmol/L的NaCl浓度可作为樱桃番茄抗盐筛选的合适浓度;在204 mmol/L的盐浓度下胁迫15 d后,樱桃番茄幼苗叶片的相对电导率、CAT酶活和POD酶活的变化幅度相差明显,可作为抗性筛选指标。

Salt injury was one of the prominent problems suffered in protected farming of cherry tomatoes. In order to provide salt-resistance breeding and salt damage prevention and control in protected farming of cherry tomatoes with theoretical basis and references, using the two varieties ‘Jingdan No. 5＇ and ‘ Xiaoyuanzao’ as materials, the effects of salt stress of different concentration on physiological and biochemical parameters of cherry tomatoes seedlings were studied. The results showed that 204 mmol/L concentration could be adopted as the optimal concentration of NaC1 for biochemical and physiological testing of salt resistance of cherry tomato. After the two varieties were stressed under NaCI of 204 mmol/L for 15 days, the range abilities of relative electric conductivity,POD and CAT activity in cherry tomato seedling leaves were different greatly. So they could be adopted as the select index of salt-resistance.