摘要
研究了ＣＯ２倍增／盐胁迫对不同抗盐性冬小麦幼苗有机干重，Ｋ＋、Ｎａ＋、Ｃａ、Ｍｇ含量，脯氨酸水平及蛋白质变化的效应。表明两种小麦生长在１５０ｍｍｏｌ／ＬＮａＣｌ下，其有机干重，Ｋ＋、Ｃａ、Ｍｇ含量下降，而Ｎａ＋明显升高；ＣＯ２倍增可增加小麦有机干重，使一价阳离子Ｋ＋、Ｎａ＋含量升高，二价阳离子Ｃａ、Ｍｇ呈下降趋势，同时有利于游离脯氨酸的积累，并为植物进行渗透调节提供大量的碳源。１５０ｍｍｏｌ／ＬＮａＣｌ可降低普通小麦蛋白质含量，ＣＯ２倍增具提高蛋白质含量的效应，而ＣＯ２倍增／ＮａＣｌ胁迫对抗盐小麦蛋白变化影响不明显，但ＣＯ２倍增／ＮａＣｌ胁迫明显改变了两种小麦蛋白质的组成。指出ＣＯ２倍增可提高小麦的耐盐能力，减轻盐胁迫的毒害效应，提高作物产量。
The effect of doubled CO_2/salt stress on the organic dry weight,contents of K^+ Na^+ Ca Mg,proling level and the changes of content and composition of protein were investigated in two wheat varieties with different salt tolerance.The organic dry weight and K^+、Ca、Mgcontents in two wheat seedlings grown in 150mmol/L NaCl decreased comparing with the controls while Na^+ level increased.Under doubled CO_2,the organic dry weigt and K^+、Na^+levels rose,but Ca、Mg levels fell.Moreover,doubled CO_2 concentration was able to enhance proline accumulation and provide carbon source for osmoregulation.The protein content of saltsensitive wheat was decreased by 150mmol/L NaCl and elevated by doubled CO_2.CO_2/salt had little or no effect on the change of protein in salttolerance wheat,while the composition of protein in two wheat varieties were significantly changed by doubled CO_2/salt stress.Data suggest that elevated CO_2 conentration might increase the capacity of salt tolerance and production in wheat.
出处
《生态学报》
CAS
CSCD
北大核心
1998年第4期408-412,共5页
Acta Ecologica Sinica
基金
国家自然科学基金
国家攀登计划
山东省自然科学基金
关键词
CO2倍增
盐胁迫
小麦
离子含量
蛋白质变化
doubled CO_2,salt stress,wheat,ion content,proline level,protein change.
