The Function of Chloroplast GST of Puccinellia Tenuiflora Seedling Leaves in Resistance to Na₂CO₃ Stress

Abstract:

In order to probe into orderliness changes of Glutathione S-Transferase (GST) of chloroplast of Puccinellia tenuiflora seedlings under Na₂CO₃ stress and its function in resistance to Na₂CO₃ stress, relative electric conductance, GST activity and the O₂^-.produce rate of the chloroplast, and the osmotic potential of leaves, and the osmotic potential of culture solution of P. tenuiflora seedlings under different Na₂CO₃ stress were concerned. The result shows that in the Na₂CO₃ stress range of 0～0.4%, along with the increase of its intensity under different Na₂CO₃ stress intensity, GST activity of the chloroplast of seedling leaves of P. tenuiflora is strengthened and GST activity is rapidly weakened with the increase of the intensity of Na₂CO₃ stress more than 0.4%. The change of GST activity of the chloroplast along with the osmotic potential of culture solution and seedling leaves, relative electric conductance of the seedling leaves as well as the O₂^-.produce rate have the similar change tendency. There is significant nonlinear relationship among GST activity of chloroplast, osmotic potential of the seedling leaves and Na₂CO₃ concentration of culture solution, and among GST activity of chloroplast, O₂^-.produce rate and osmotic potential of seedling leaves, and among GST activity of chloroplast, osmotic potential of culture solution and that of seedling leaves, and among GST activity, the O₂^-.produce rate of chloroplast and relative electric conductance of the seedling leaves. These indicate that GST of chloroplast plays an important role in the process of seedlings of P. tenuiflora in resistance to the low intensity of Na₂CO₃ stress.

• Periodical: Advanced Materials Research (Volumes 343-344)
• Pages: 712-720
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.343-344.712
• Online since: September 2011
• Authors: Guo Rong Sun, Xue Li Wu, Gang Chen, Jian Bo Wang, Wen Zhong Cao, Qun Du, Biao Zhang
• Keywords: Chloroplast, Glutathione S-Transferase (GST) Activity, Na₂CO₃ Stress, O₂- Produce Rate, Osmotic Potential, Seedling of Pccinellia Tenuiflora

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