摘要
通过盆栽试验探讨Cd2+胁迫对扬稻6号和粳稻941颖果充实和生理活性的影响,结果表明:Cd2+胁迫降低颖果呼吸速率、光合速率以及ATP含量;降低颖壳和果皮叶绿素含量;使颖果灌浆速率减慢,鲜干重增加的速率减缓,灌浆的天数变短,最终成熟颖果干重降低。说明Cd2+胁迫降低颖果呼吸活性、能量物质以及其它生理活性,从而降低颖果的代谢活性和发育时间,最终导致贮藏物质的合成和积累量降低。
In a soil pot experiment, two rice varieties, Yangdao 6 （Indica） and Jingdao 941 （Japonica）, were used as experimental materials to study the effects of Cd^2＋ stress on the filling and physiological activities of rice caryopsis. The results show that： compared with the control group, Cd^2＋ stress lowers the respiratory activity, photosynthetic rate and ATP content of rice caryopsis; decreases the chlorophyll contents in the glume and pericarp; slows down the grain filling rate and speeds up the rate of fresh weight and dry weight of the grain; shortens grain filling time; the weight of ripe caryopsis decreases; physiological activities, such as respiratory rate and ATP content, drops; caryopsis＇ metabolic activity and time reduce; and the amount of synthesis and accumulation of the dry materials of rice caryopsis goes down.
出处
《黄冈师范学院学报》
2009年第3期25-29,共5页
Journal of Huanggang Normal University
基金
黄冈师范学院博士基金(06CD179)
湖北省教育厅自科中青年基金项目(Q200727003)
湖北省自科基金(2007ABA364)
关键词
水稻
镉胁迫
呼吸活性
ATP含量
叶绿素的含量
光合速率
rice
Cd^2＋ stress
respiratory rate
ATP content
chlorophyll contents
photosynthetic rate
