氨基酸对渗透胁迫下荞麦种子萌发及幼苗生长的效应

Effects of Amino Acid on Seeds Germination and Seedlings Growth of Buckwheat under Osmotic Stress

以荞麦抗逆品种川荞4号和敏感品种川荞3号为试验材料,研究渗透胁迫下不同浓度氨基酸对荞麦种子萌发及幼苗生长的效应。结果表明,适当浓度谷氨酸和天冬氨酸可显著增加渗透胁迫下荞麦种子发芽率、幼苗鲜重、叶片叶绿素含量和根系活力,适当浓度天冬氨酸处理使抗逆品种种子发芽率和叶片叶绿素含量恢复至对照水平,但适当浓度氨基酸处理时敏感品种增加幅度较大,说明适当浓度氨基酸对渗透胁迫下荞麦种子萌发和幼苗生长具有显著促进效应。荞麦敏感品种氨基酸处理的最适浓度为30μmol/L,荞麦抗逆品种氨基酸处理的最适浓度为20μmol/L,且天冬氨酸的处理效果优于谷氨酸处理。

Stress resistant buckwheat variety Chuanqian No. 4 and sensitive buckwheat variety Chuanqian No. 3 were used as experimental materials, and the effects of amino acid of different concentrations on the seeds germination and seedlings growth of buckwheat under osmotic stress were studied. The results showed that the appropriate concentrations of glutamic acid and aspartic acid could significantly increase the seeds gcrmination rate, seedlings fresh weight, leaves chlorophyll content and roots vigor of buckwheat under osmotic stress, and the appropriate concentrations of aspartic acid treatment could resume the seeds germination rate and leaves chlorephyll content of stress resistant buckwheat variety to the control level, while that of amino acid treatment could make sensitive buckwheat variety increase more. It indicated that the appropriate concentrations of amino acid could significantly improve the seeds germination and seedlings growth of buckwheat under osmotic stress. The optimal concentrations of amino acid treatment in sensitive buckwheat variety was 30 μmot/L, and that in stress resistant buckwheat variety was 20 μmol/L, and the effect of aspartic acid treatment was better than that of glutamic acid.