Effect of Cu2+ , Zn2++ and Mn2+ on SOD Activity of Cucumber Leaves Extraction after Low Temperature Stress

ACTA HORTICULTURAE SINICA ›› 2007, Vol. 34 ›› Issue (4): 895-900.

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Effect of Cu²⁺ , Zn²⁺+ and Mn²⁺ on SOD Activity of Cucumber Leaves Extraction after Low Temperature Stress

LI Tao;YU Xian-chang

(College of Horticulture Science and Engineering, State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, Shandong 271018, China)

Received:1900-01-01 Revised:1900-01-01 Online:2007-08-25 Published:2007-08-25

Abstract

Abstract: The contents ofMn, Zn, Cu, Fe and the activities of superoxide dismutase ( SOD) and its
isoenzymes in grafted and own-rooted cucumber leaves under low temperature stresswere studied. The results
indicated that the contents ofMn, Cu, Zn and the activities of SOD, Cu /Zn-SOD andMn-SOD in grafted cucumber leaveswere significantly higher than those in own-rooted cucumber leaves, while the content of Fe and
Fe2SOD activity was lower. In order to make clear the relationship s between high contents ofMn, Zn, Cu and SOD activity in grafted cucumber, Mn²⁺ , Zn²⁺ and Cu²⁺ and different combinations were added into own-rooted cucumber leaves extraction, respectively, in the third day during low temperature stress and made their final concentrations were the same as they in grafted cumber leaves extraction. The results showed that adding Mn²⁺ , Zn²⁺ , Cu²⁺ and their different combinations were added into own-rooted cucumber leaves extraction could enhance the SOD and its isoenzymes activities excep t the Fe-SOD. The sequence of increasing level was Mn²⁺ + Zn²⁺ , Mn²⁺ +Cu²⁺, Mn²⁺ , Cu²⁺, Cu²⁺ + Zn²⁺ +Mn²⁺ , Cu²⁺ + Zn²⁺ and Zn²⁺. This re-search has p roved that theMn, Cu and Zn in cucumber leave could affect the SOD activity and the higher SODactivity in grafted cucumber leave might be attributed to higher accumulation of Cu, Zn and Mn.

Key words: Cucumber, Graft, Microelement, Low temperature stress, SOD activity

LI Tao;YU Xian-chang. Effect of Cu²⁺ , Zn²⁺+ and Mn²⁺ on SOD Activity of Cucumber Leaves Extraction after Low Temperature Stress[J]. ACTA HORTICULTURAE SINICA, 2007, 34(4): 895-900.

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Effect of Cu²⁺ , Zn²⁺+ and Mn²⁺ on SOD Activity of Cucumber Leaves Extraction after Low Temperature Stress

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