稀土微肥和NO对干旱胁迫下小麦光合生理的影响  

Effect of REE and NO on Some Photosynthetic-characteristic in Wheat under Drought Stress

作　　者：唐加红[1] 刘丹[1] 杨玉兰[1] 李稳[1] 陈国祥[1] 

机构地区：[1]南京师范大学生命科学学院,江苏南京210046

出　　处：《稀土》2012年第3期21-25,共5页Chinese Rare Earths

基　　金：国家自然科学基金资助项目(30771299);高等学校博士学科点专项科研基金(20060319005)

摘　　要：在土壤相对含水量为40%的干旱胁迫下,分别从膜脂过氧化、渗透调节物质、光合参数等三个方面研究了稀土微肥和外源一氧化氮(NO)供体硝普钠(SNP)对干旱胁迫下小麦部分光合生理特性的影响。结果表明,稀土微肥和硝普钠均能降低干旱胁迫引起的小麦叶片MDA含量上升、质膜相对透性升高,提高干旱引起的叶片相对含水量的降低,缓解膜脂过氧化;使渗透调节物质脯氨酸和可溶性蛋白的含量都接近正常水平,提高了干旱胁迫下小麦的渗透调节能力;诱导叶片叶绿素合成提高净光合速率。Under the drought stress by 40% content of the soil water,we studied the effects of rare earth elements and exogenous nitric oxide（NO） for sodium nitroprusside（SNP） on the physiological and photosynthetic characteristics including membrane lipid peroxidation,content of osmotic adjustment and photosynthetic parameters.The results showed that REE and SNP can not only reduce the increase of the MDA content in wheat leaves and the membrane permeability caused by drought stress,but also ease reduction of leaf relative water content and peroxidation of membrane lipid;the contents of proline and soluble protein were close to normal levels.REE and SNP increased the ability of osmotic adjustment under drought stress and finally induced synthesis of chlorophyll and the rate of net photosynthetic.

关 键 词：干旱 稀土微肥 硝普钠 膜脂过氧化 渗透调节 光合作用 

分 类 号：Q945.78[生物学—植物学]