NaCl胁迫与等渗PEG处理对荞麦幼苗渗调物质累积的影响  

Effects of NaCl Stress and Iso-Osmotic PEG Treatment on Osmoticum Accumulation of Buckwheat Seedlings

作　　者：柳成荫[1] 杨洪兵[1] 

机构地区：[1]青岛农业大学生命科学学院,山东青岛266109

出　　处：《西南农业学报》2011年第4期1279-1281,共3页Southwest China Journal of Agricultural Sciences

基　　金：山东省自然科学基金项目(ZR2010CL019);青岛农业大学院重点课程建设项目(YZDK1003);青岛农业大学高层次人才启动基金项目(630423)

摘　　要：NaCl胁迫与等渗PEG处理均引起不同耐盐性荞麦幼苗游离脯氨酸和可溶性糖含量增加,NaCl胁迫下的增加量明显大于等渗PEG处理,说明离子效应发挥了主要作用;耐盐荞麦品种川荞1号根部和叶片的游离脯氨酸及可溶性糖含量增加量相对较少,变化率低,表明荞麦的耐盐性与渗调物质的累积量呈负相关。盐敏感荞麦品种TQ-0808在高浓度NaCl胁迫下渗调物质大量累积可能是盐胁迫导致代谢失调造成的,应该是一种盐害的表现。NaCl stress and iso-osmotic PEG treatment all caused the increase of free proline and soluble sugar in buckwheat seedlings with different salt-tolerance, and that of the increase under NaCl stress was obviously more than that under iso-osmotic PEG treatment. It indicated that ion effect played the main role in it. Free proline and soluble sugar content of roots and leaves in salt-tolerant Chuanqlao No. 1 increased less and had a low variety rate. Salt-tolerance of buckwheat showed negative correlation with osmoticum accumulation. Abundant osmoticum accumulation in salt-sensitive TQ-0808 might be caused by metabolism disorder under high concentration salt stress and should be a representation of salt damage.

关 键 词：荞麦 NACL胁迫 水分胁迫 游离脯氨酸 可溶性糖 

分 类 号：S311[农业科学—作物栽培与耕作技术]