Physiological and growth responses of two different salt-sensitive cucumber cultivars to NaCl stress(Plant Nutrition)

スポンサーリンク

概要

• 論文の詳細を見る

• The effect of NaCl stress on the growth, membrane permeability, anti-oxidant enzyme activities and ion content of cucumber seedlings was investigated. Two cultivars (Jinchun No.2, a relatively salt-sensitive cultivar, and Zaoduojia, a relatively salt-tolerant cultivar) of cucumber were used. Shoot and root dry weights, plant height, stem diameter, leaf area and leaf number of both cultivars decreased when NaCl concentrations increased. The decreases in shoot and root dry weights and leaf area were more significant in Jinchun No.2 than in Zaoduojia. Meanwhile, the salt injury index, the membrane permeability, malondialdehyde (MDA) contents, superoxide dismutase (SOD) and peroxidase (POD) activities of both cultivars increased significantly with salt stress, and the increases in the salt injury index and MDA were higher in Jinchun No.2 than in Zaoduojia, whereas the increase in POD activity was lower in Jinchun No.2 than in Zaoduojia. Free proline content of Zaoduojia increased markedly with increasing concentrations of NaCl, whereas the content of Jinchun No.2 was unaffected by salt stress. In addition, the contents of Na^+ in the leaf, stem and root of both cultivars increased significantly, whereas the contents of K^+ decreased significantly, resulting in an increase in the Na^+/K^+ ratio when NaCl concentrations increased. These results suggest that Zaoduojia exhibits a better protection mechanism against oxidative damage and lipid peroxidation by maintaining higher proline content and POD activity than the salt-sensitive Jinchun No.2 cultivar.

• 社団法人日本土壌肥料学会の論文

著者

• BIE Zhilong

  College of Horticulture and Forestry, Huazhong Agricultural University

• Zhu Jin

  College Of Horticulture And Forestry Huazhong Agricultural University:key Laboratory Of Horticultura

• Bie Zhilong

  College Of Horticulture And Forestry Huazhong Agricultural University:key Laboratory Of Horticultura

• LI Yana

  College of Horticulture and Forestry, Huazhong Agricultural University

• Li Yana

  College Of Horticulture And Forestry Huazhong Agricultural University:key Laboratory Of Horticultura

関連論文

• Effects of scion and rootstock genotypes on the anti-oxidant defense systems of grafted cucumber seedlings under NaCl stress(Plant Nutrition)
• Protective role of proline against salt stress is partially related to the improvement of water status and peroxidase enzyme activity in cucumber(Plant Nutrition)
• Physiological and growth responses of two different salt-sensitive cucumber cultivars to NaCl stress(Plant Nutrition)
• Effect of grafting on the growth and ion concentrations of cucumber seedlings under NaCl stress(Plant Nutrition)

スポンサーリンク