Scientia Agricultura Sinica ›› 2005, Vol. 38 ›› Issue (01): 197-202 .doi: 10.3864/j.issn.0578-1752.as-2003-1543

• RESEARCH NOTES • Previous Articles     Next Articles

Effects of Calcium and Calmodulin Antagonist on Antioxidant Systems of Eggplant Seedlings Under High Temperature Stress

  

  1. 河北农业大学园艺学院
  • Received:2003-07-07 Revised:2003-10-14 Online:2005-01-10 Published:2005-01-10

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Abstract: After being enhanced or blocked Ca2+-CaM signal transduction by pretreating the eggplants of 'Nongyouqie' and 'Erminqie' with external Ca2+ and calmodulin antagonists TFP and W7, production rate of O2-, the content of MDA, activities of SOD and POD and the contents of Pro and GSH under high temperature stress of 40℃(day/night)were investigated. The results showed that seeds were pretreated with calmodulin antagonist, TFP and W7 resulted in more rapid loss of SOD and POD activity, higher contents of MDA, Pro, and production rate of O2-, in addition, aggravate the damage of GSH; On the contrary, Ca2+ treatment enabled the seedlings to keep relatively high activities of SOD and POD, lower production rate of O2-and MDA content, at the same time, alleviated the damage of GSH and the accumulation of Pro caused by high temperature stress. These results indicated that Ca2+-CaM signal transduction might regulate the heat resistance of eggplant seedlings by affecting the activity of some antioxidant enzymes and the content of antioxidant substance.

Key words: Eggplant, Ca2+, TFP, W7, High temperature stress, Antioxidatant systems

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