Volume 25 Issue 4
Aug.  2008
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LI Ying-chun, FAN Wei-guo, CHEN Shuang-lin. Soil drought stress on membrane-lipid peroxidation and antioxidant enzymes in pear rootstock[J]. Journal of Zhejiang A&F University, 2008, 25(4): 437-441.
Citation: LI Ying-chun, FAN Wei-guo, CHEN Shuang-lin. Soil drought stress on membrane-lipid peroxidation and antioxidant enzymes in pear rootstock[J]. Journal of Zhejiang A&F University, 2008, 25(4): 437-441.

Soil drought stress on membrane-lipid peroxidation and antioxidant enzymes in pear rootstock

  • Publish Date: 2008-08-20
通讯作者: 陈斌, bchen63@163.com
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Soil drought stress on membrane-lipid peroxidation and antioxidant enzymes in pear rootstock

Abstract: In order to breed drought-tolerant cultivars of pear,the effect of drought stress on membrane permeability and antioxidant enzyme systems the four one-year-old Pyrus(pear) species of(P. betulaefolia,P. pyrifolia,P. pashia,and P. pseudopashia) grown in pot,were studied in the Karst Fruit Tree Research Insititute of Guizhou University,from 2003 to 2005. Four treatments were set,including the control:the soil relative water content(SRWC) is(65.0 ± 5.0)%,light stress:the SRWC is(50.0 ± 5.0)%,moderate stress:the SRWC is(40.0 ± 5.0)%,severe stress:the SRWC is(32.5 ± 5.0)%,with three replication. Results showed that malondialdehyde(MDA) content significantly decreased(P<0.01) with light stress for P. pyrifolia,but significantly increased(P<0.01) with moderate and severe stress for all species. With severe drought stress,damage to the membrane structure of P. pyrifolia was greater than the other three species. Damage for P. pyrifolia was 35.91%,while P. pseudopashia was 10.72%,P. pashia was 10.34% and P. betulaefolia was 8.00%. Superoxide dismutase(SOD) activities of P. pyrifolia decreased,while the other three species first increased with light stress and then decreased with moderate and severe stress. Peroxidase(POD) and catalase(CAT) activities decreased for the four species. With drought stress and elimination of oxygen free radicals,the four Pyrus species avoided injury in the following order:P. pyrifolia > P. pseudopashia > P. pashia > P. betulaefolia. [Ch,3 fig. 1 tab. 19 ref.]

LI Ying-chun, FAN Wei-guo, CHEN Shuang-lin. Soil drought stress on membrane-lipid peroxidation and antioxidant enzymes in pear rootstock[J]. Journal of Zhejiang A&F University, 2008, 25(4): 437-441.
Citation: LI Ying-chun, FAN Wei-guo, CHEN Shuang-lin. Soil drought stress on membrane-lipid peroxidation and antioxidant enzymes in pear rootstock[J]. Journal of Zhejiang A&F University, 2008, 25(4): 437-441.

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