Effect of Exogenous Substances on Antioxidant Protection Enzyme Activity of Drought Stress and Rewater for Malus hupehensis
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Bibliographic record
Abstract
An experiment was set up,the effect of exogenous GB,ABA and NO to the antioxidant protection enzyme activity after drought and rewater using two-year-old Malus hupehensis for materials were studied and compared.The results showed that exogenous GB,ABA and NO significantly reduced the relative membrane permeability and MDA content in leaves of Malus hupehensis after drought stress and rewater.Compared with CK,in severe drought,the relative membrane permeability and MDA content respectively decreased by 13.5%,12.2%,18.4% and 32.4%,14.4%,37.6%;exogenous GB,ABA and NO improved the activities of SOD,CAT and POD in leaves of Malus hupehensis,in field moisture capacity 30% they respectively achieved the maximum,compared with the same period CK,POD activity respectively increased by 13.5%,13.4% and 24.4%,SOD activity respectively increased by 15.3%,13.7% and 16.2%,CAT activity respectively increased by 63.2%,53.7% and 95.3%,then the enzyme activity decreased.Exogenous GB,ABA treatment made the DHAR,APX,GR,MDHAR activity and the CAT activity had a same changing trends,also in field moisture capacity 30% they respectively achieve the maximum;exogenous NO treatment also made the DHAR,APX,GR activity had the same change tendency,although NO treatment made the MDHAR activity higher than the single drought treatment,but not reached significant differences.After rewater,the variation tendencies of the drought resistance and physiological indexes of Malus hupehensis was the same,which treaded with the different exogenous substances.The results clearly explained that exogenous GB,ABA and NO can effectively increase the antioxidant protection enzyme activity of the leaves,enhance the drought resistance of Malus hupehensis.Comparison between GB,ABA and NO treatment showed that,in the improvement of drought resistance of Malus hupehensis,NO treatment was the best one,GB treatment was next,ABA was the last one.
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Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
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