干旱胁迫条件下几种胡枝子渗透物质变化的研究  

Studies on Change of Osmolytes in Lespedeza Michxunder Drought Stress

作　　者：杜金友[1,2] 陈晓阳[2] 胡东南[2] 高琼[2] 陈佳[2] 

机构地区：[1]河北北方学院南校区农业科学系 [2]北京林业大学林木,花卉遗传育种与基因工程实验室,北京100083

出　　处：《华北农学报》2004年第F12期40-44,共5页Acta Agriculturae Boreali-Sinica

基　　金：国家高技术研究发展计划(863计划)"豆科饲料型灌木抗逆新品种选育"(2002AA241111)

摘　　要：以胡枝子属中的6个种为材料,研究了干旱胁迫条件下脯氨酸、可溶性糖、可溶性蛋白质及热稳定蛋白质的变化。结果表明,干旱胁迫对胡枝子脯氨酸含量变化有较大的影响。在土壤相对含水量从75%～80%下降到55%～60%时可溶性糖的含量增加较少,而当土壤相对含水量下降到35%～40％时则迅速增加。随着土壤相对含水量的下降,各种可溶性蛋白质含量均呈逐渐下降趋势。热稳定蛋白质含量在土壤相对含水量从75%～80%下降到55%～60%时增加,而当土壤相对含水量下降到35%～40%时则迅速减少。认为在脯氨酸、热稳定蛋白质与可溶性糖之间可能存在着互为补偿的作用。Six species of Lespedeza Michx. were studied under drought stress, and five ideas inferred from the resuhs： （1）Free proline had been badly affected under drought stress in Lespedeza Michx., and this influence was different from the each species of Lespedeza Michx.（2）The accumulation of soluble sugar increased a little while soil moisture content declined from 75%-80% to 55%-60%,but increased rapidly while soil moisture content declined from 55%-60% to 35%- 40%.（3）The content of soluble protein droped gradually under drought stress.（4）The content of heat stable protein increased while soil moisture content declined from 75%-80% to 55%-60%,but droped rapidly while soil moisture content declined from 55%-60% to 35%-40%.（5） we supposed that the accumulation of free proline,heat stable protein were related to the accumulation of soluble sugar.

关 键 词：胡枝子 干旱胁迫 脯氨酸 可溶性糖 可溶性蛋白质 热稳定蛋白质 

分 类 号：S727.22[农业科学—林木遗传育种]