摘要
探讨不同浓度外源脯氨酸(Pro)处理对荞麦幼苗耐盐生理特性的影响。以盐敏感荞麦品种TQ-0808为实验材料,100mmol/LNaCl胁迫下添加不同浓度Pro处理,测定相关耐盐生理指标。外源Pro能明显降低盐胁迫下荞麦叶片质膜透性和MDA含量,20～30mmol/LPro处理时降低幅度最大;外源Pro还能显著增加盐胁迫下荞麦叶片SOD活性和净光合速率,20～30mmol/LPro处理时增加幅度最大。说明外源Pro可明显改善盐胁迫下荞麦幼苗的生理特性,对盐胁迫具有较好的缓解作用。20～30mmol/LPro处理对荞麦幼苗盐胁迫的缓解作用最好。
The effect of exogenous proline （Pro） treatment of different concentrations on pnysloioglcal characters of salt tolerance in buckwheat seedlings was studied. The salt-sensitive buckwheat variety （TQ-0808） was used as experimental material, which was treated with adding different concentrations of Pro under NaC1 stress of 100 mmol/L, and the relevant physiological indexes of salt tolerance were measured. The results showed that the exogenous Pro could obviously decrease the plasmalemma permeability and MDA content of buckwheat leaves, and the treatment with 20-30 mmol/L Pro had the most decreased amount. The exogenous Pro could also obviously increase the SOD activity and net photosynthetic rate of buckwheat leaves, and the treatment with 20-30 mmol/L Pro had the most increased amount. It indicated that the exogenous Pro could significantly improve the physiological characters of buckwheat seedlings under salt stress and had a better mitigation to salt stress. The Pro treatment concentration of 20-30 mmol/L had the best mitigation to salt stress in buckwheat seedlings.
出处
《中国农学通报》
CSCD
2012年第36期92-95,共4页
Chinese Agricultural Science Bulletin
基金
山东省自然科学基金"荞麦幼苗拒Na+生理模式初探"(ZR2010CL019)
关键词
荞麦
盐胁迫
外源脯氨酸
耐盐性
buckwheat
salt stress
exogenous proline
salt tolerance
