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目的:综合评价5个不同产地牛蒡幼苗的耐盐性。方法:采用营养液水培法,在盐胁迫条件下,通过测定牛蒡幼苗的超氧化物歧化酶、过氧化氢酶、过氧化物酶、丙二醛含量、蒸腾速率、气孔导度和光合速率等生理指标,利用主成分分析法对5个产地牛蒡的耐盐性进行综合评价。结果:5个不同产地牛蒡的耐盐性强弱顺序为:四川牛蒡>日本牛蒡>吉林牛蒡>山东牛蒡>江苏牛蒡。结论:主成分分析法可以避免单一指标的片面性,能较全面地评价地被植物的耐盐性。四川牛蒡具有较强的耐盐性,具有可在土壤盐渍化地区进行栽培的可行性。
Objective: To evaluate the salt tolerance of burdock seedlings in five different areas. Methods: The nutrient solution hydroponics was used to measure the content of superoxide dismutase, catalase, peroxidase, malondialdehyde, transpiration rate, stomatal conductance and photosynthetic rate of burdock seedlings under salt stress And other physiological indicators, the use of principal component analysis of burdock in five areas of salt tolerance comprehensive evaluation. Results: The order of salt tolerance of Burdock in five different areas was as follows: Sichuan burdock> Japanese burdock> Jilin burdock> Shandong burdock> Jiangsu burdock. Conclusion: The principal component analysis can avoid the one-sidedness of a single indicator and evaluate the salt tolerance of ground cover more comprehensively. Burdock in Sichuan has strong salt tolerance, with the feasibility of cultivation in soil salinization areas.