| Effects of different priming treatments on germination and seedling drought resistances of Astragalus membranaceus (Fisch) Bge. |
|
View Fulltext View/Add Comment Download reader |
| |
| DOI：10.7606/j.issn.1000-7601.2013.05.039 |
| Key Words: Astragalus membranaceus (Fisch.)Bge.seed priming treatments permination drought resistance |
|
| Hits: 2422 |
| Download times: 1555 |
| Abstract: |
| Objective: Physiological effects of seed priming on drought resistance of Astragalus membranaceus (Fisch.) Bge. seedlings were studied in this paper. Method: After Astragalus membranaceus (Fisch.) Bge.seeds were subject to different priming with H2O, 20% PEG-6000,0.25% KNO3,100 mg·L-1 GA3 and 12.5 mg·L-1 6-BA respectively for germination experiment, seedlings were under 20% PEG-6000 simulated drought stress to measure d
rought related physiological indicators. Results: The sequence of Germination energy and germination percentage was identical: 12.5 mg·L-1 6-BA＞100 mg·L-1 GA3＞0.25% KNO3＞20% PEG-6000＞H2O＞CK; and the sequence of Simplified vigor index was 0.25% KNO3＞100 mg·L-1 GA3≈20% PEG-6000＞H2O＞12.5 mg·L-1 6-BA＞CK. Malondialdehyde (MDA) content, soluble protein content, proline content, chlorophyll content, superoxide dismutase (SOD), peroxidase(POD) and catalase activity (CAT) of seedling have a significant difference between CK.According to comparing the Average value of subordinate function, the rank of drought resistance was H2O＞20% PEG-6000＞0.25% KNO3≈12.5 mg·L-1 6-BA＞CK＞100 mg·L-1 GA3. Conclusion: 20% PEG-6000, or 0.25% KNO2 can effectively promote seed germination and improve seedling drought resistance. |
|
|
|