摘要
对水分胁迫下早酥梨和杜梨两种梨树叶片的质膜氧化还原系统进行了研究。结果表明,水分胁迫使梨幼树叶片质膜ATPase活性提高,质膜NADH(还原性辅酶Ⅰ)和NADPH(还原性辅酶Ⅱ)的氧化速率及Fe(CN)6(3-)和EDTA-Fe3+的还原速率降低,GSH(谷胱甘肽)和Vc(抗坏血酸)的氧化速率明显增加,表明除了NADH和NADPH外,GSH和Vc也可以作为早酥梨幼树叶片质膜氧化还原系统的电子供体。进一步而言,在水分胁迫条件下,GSH和Vc可能是代替NADH和NADPH的质膜氧化还原系统的电子供体。
The basic physiological index of redox system of leaf plasmic membrane were studied on two varieties of pear trees, P. bretschneideri cv. Zao Su and P. betuloefolia. Bqe. The result showed that water stress could increase ATPase activity, reduce both the oxidation rate of NADH and NADPH and the deoxidation rate of EDTA-Fe^3＋ and Fe（CN）6^（3- ） of plasmic membrane. When water stress occurred, the oxidation rate of GSH and vitamin C （Vc） obviously increased, which indicated that GSH and Vc could be as electron donor of redox system of plasmie membrane besides NADH and NADPH in the leaves of young crisp pear trees. Probably under water stress condition, GSH and Vc could replace NADH and NADPH, acting as electron donor of redox system of olasmic membrane.
出处
《干旱地区农业研究》
CSCD
北大核心
2009年第4期90-93,共4页
Agricultural Research in the Arid Areas
基金
内蒙古自治区高等学校科学研究项目(NJZY07105)
关键词
水分胁迫
早酥梨
杜梨
质膜氧化还原系统
water stress
crisp pear
birchleaf pear
redox system of plasmic membrane
