摘要
通过分析渗透调节物质脯氨酸和可溶性糖含量的变化,利用洗叶技术分析燕麦叶片洗脱物的离子组成,以及对气孔周围结晶的X—ray分析,并利用扫描电子显微镜观察燕麦叶片的表面结构,研究了燕麦对盐碱胁迫的生理响应。结果表明,在盐碱胁迫下,燕麦叶片中脯氨酸和可溶性糖含量增加;经过混合盐处理后,叶片洗脱物主要由Cl-、Na+、K+、HCO-3、Mg2+和Ca2+等离子组成,不含CO32-和SO42-,其中Cl-、Na+、K+含量极显著高于对照,HCO3-、Mg2+含量显著高于对照,Ca2+含量与对照差异不显著;通过扫描电镜观察叶片表面,发现气孔周围分布着盐结晶,表明燕麦通过气孔排盐适应盐碱胁迫。
By means of analyzing the content of proline and soluble sugar, leaves-washing technology, X - ray analysis and scanning electron microscope （SEM）, the change of proline and soluble sugar and the composing of washings from oats leaves were analyzed, and superficial structure of leaves were observed under saline-alkali stress. The results revealed that the content of proline and soluble sugar increased with increasing salinity in both breeds, the washings from oats leaves of saline-alkali stress were comprised Clˉ, Na^＋, K^＋, HCO3ˉ, Mg^2＋ and Ca^2＋ and none of CO3^2- and SO4^2-. The quantities of Clˉ, Na^＋ and K^＋ of treated leaves washings were most significant higher than control. The quantities of HCO3ˉ and Mg^2＋ of treated leaves washings were significant higher than control. There was none significant difference to the quantity of Ca^2＋ between treated and control. There were large numbers of salt crystals on the stomata, the resistant mechanism in oats to saline-alkali stress is discharging salt by stomata.
出处
《水土保持学报》
CSCD
北大核心
2007年第3期86-89,共4页
Journal of Soil and Water Conservation
基金
中国科学院知识创新工程重大项目(KZCX1-SW-19)
安徽师范大学博士科研启动基金资助
关键词
燕麦
盐碱胁迫
生理响应
气孔排盐
oats
saline-alkali stress
physiological responses
discharging salt by stomata
