| Study on antioxidant protection system of eight species of Seriphidium （Bess．） Poljak．seedlings |
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| DOI：10.7606/j.issn.1000-7601.2009.06.32 |
| Key Words: Seriphidium (Bess.) Poljak seedling antioxidant protection system |
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| Abstract: |
| The change of antioxidant protection system for eight species of Seriphidium (Bess.) Poljak. (S.minchünense, S.sublessingianum, S.nitrosum, S.transiliens, S.borotalense, S.cinum, S.sawanense, S.kaschgaricum) seedlings was studied in pot culture.The results showed that MDA, soluble sugar content, POD activity firstly increased and then decreased, soluble protein content was “high-low-high”, SOD activity decreased and CAT increased with prolongation of the growth period of seedlings.There were some differences of protective enzyme activity, MDA, soluble sugar and soluble protein content in eight species of seedlings, in which MDA content was the highest in S.sublessingianum, while S.nitrosum’s was the lowest.MDA had significant negative correlation with soluble sugar content and SOD activity.The change trends of different indicators explained that seedlings mainly depended on CAT, POD and nonemzyme protective system to resist the adverse environmental in early growth period, however, the role is due to SOD and nonemzyme protection system in later period. S.nitrosum, S.minchünense, S.borotalense, S.sawanense and S.cinum’s resistance were the strongest, S.kaschgaricum and S.transiliens’s resistance were strong, while S.sublessingianum’s resistance was the weakest in eight species of seedlings.The different resistance among species resulted from their adaptability to respective habitat. |
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