干旱地区农业研究Issue(5)：233-237,5.
引发对黄芪种子萌发及幼苗抗旱性的影响
Effects of different priming treatments on germination and seedling drought-resistances of Astragalus membranaceus (Fisch) Bge.
摘要
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 drought-related physiological indicators .Results:The sequence of Germination energy and germination percentage was i-dentical :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 dismu-tase (SOD ) ,peroxidase (POD ) and catalase activity (CAT ) of seedling have a significant difference between CK .Ac-cording 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%KNO3 can effectively promote seed germination and improve seedling drought-resistance .关键词
黄芪/引发处理/萌发/抗旱性Key words
Astragalus membranaceus (Fisch .)Bge .seed/Priming treatments/Permination/Drought-resistance分类
农业科技引用本文复制引用
何军,浦俊,王渭玲,高青鸽..引发对黄芪种子萌发及幼苗抗旱性的影响[J].干旱地区农业研究,2013,(5):233-237,5.基金项目
“十二五”国家科技支撑计划（2011BAD29B04）；陕西省科技统筹创新工程 （）
