外源甜菜碱对盐胁迫下2种南瓜幼苗生长的影响

Li Weixin, Hebei North University, Zhangjiakou , Horticultural Department; Yao Taimei, Hebei North University, Zhangjiakou , Horticultural Department; Wang Peng, Hebei North University, Zhangjiakou , Horticultural Department

Studies of glycine betaine on physiology of two varieties of pumpkin seedlings under NaCl stress | 外源甜菜碱对盐胁迫下2种南瓜幼苗生长的影响

2010

Li Weixin, Hebei North University, Zhangjiakou (China), Horticultural Department | Yao Taimei, Hebei North University, Zhangjiakou (China), Horticultural Department | Wang Peng, Hebei North University, Zhangjiakou (China), Horticultural Department

[Objective] The research aimed to discuss the relationship between Glycine betaine and the salt-tolerance mechanism of different pumpkins and confirm the mechanism of betaine in salt-tolerance physiology. [Method] Taking the seedlings of C.ficifolia and Qingli pumpkin as test materials, the effects of glycine betaine on the cell membrane permeability, MDA and root activity of two varieties of pumpkin seedlings under 300 mmol/L NaCl stress were studied. [Result] At suitable concentrations, glycine betaine could decrease the leaf plasma-membrane permeability of two varieties of pumpkin seedlings and inhibit the accumulation of lipid peroxide MDA and enhance the root activity of plants. [Conclusion] Pumpkin seedlings under salt stress of glycine betaine could decrease the damage of cell membrane under salt stress, relieve the salt damage and enhance the slat-tolerance of pumpkin seedlings.

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