| The effect of NaCl st ress on chlorophyl fluorescence parameters and other physiological characteristics of Glehnia littoralis |
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| DOI：10.7606/j.issn.1000-7601.2011.06.43 |
| Key Words: Glehnia littoralis NaCl stress Chlorophyll fluorescence physiological characteristics |
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| Abstract: |
| Glehnia lttoralis seedlings treated by NaCl solution with different concentrations were studied and chloro-phyll fluorescence parameters，soluble sugar content，MDA content and three types of antioxidant enzyme activity were measured. The results showed that，SOD activity and MDA content in the treatment with 100 mmol/L NaCl solution did not change significantly， while the soluble sugar content，peroxidase (POD) and catalase (CAT) activity were signifi-cantly increased first and then decreased with the increase of the solution concentration. The four parameters reflecting the fluorescence of PS Ⅱ activity center: absorption of light energy per active reaction center(ABS/ RC)，unit of reaction center to capture the energy for the reduction of QA (TR0/ RC)，reaction center umnit for electronic capture transfer of en-ergy (ET0/ RC)，unit of energy dissipated reaction center (DI0/ RC) did not change significantly in the treatments with 100 mmol/L and 200 mmol/L NaCl solutions. ABS/ RC，TR0/ RC and the DI0/ RC first increased and then decreased in the treatment with 300 mmol/L NaCl solution except ET0/ RC had lttle variation. Glehnia littoralis had a certain abil-ity to adapt and regulate NaCl stress. |