The influence of water stress on redox system of leaf plasmic membrane of pear trees
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DOI：10.7606/j.issn.1000-7601.2009.04.17
Key Words: water stress  crisp pear  birchleaf pear  redox system of plasmic membrane
Author NameAffiliation
WANG Guoze School of Mathematical, Physical Sciences and Biological Engineering, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia 014010, Chi na 
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Abstract:
      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-Fe3+ 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 plasmic 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 plasmic membrane.
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