【摘要】 不同抗旱类型大豆(G. max),在种子吸胀和萌发时期对水分的要求不同,萌发吸水速率不同。研究抗旱类型大豆品种“呼80—1001”和敏感型大豆品种“绥农四号”的吸水速率,结果表明:抗旱类型大豆品种在种子吸水后30分钟内吸水速度快;敏感型大豆品种在吸水后30分钟内较慢。这是种子的重要适旱特性,也是区别不同抗旱类型大豆种子的依据。 高渗溶剂聚乙二醇(PEG 600),在45％浓度下对吸水4—4.5小时的不同抗旱类型大豆品种的萌发率、胚根长、胚根重都有影响。抗旱类型大豆品种萌发率高,胚根生长速度快;敏感型大豆品种萌发率低,胚根生长慢。试验结果表明:PEG在45％浓度下可作为筛选不同抗旱类型大豆种子的适合浓度。更多还原

【Abstract】 Different drought resistant types of soybean cultivars have different water absorbing percentage and different-water requirement during seed germination.Study on the rates of water absorption between wsoybean cultivars "Hu80-100" a drought resistant type and the sensitive type "Shuinong 4" were carried out on. The results indicated that thirty minutes after the starting of water absorption the rate of water absorption of the drought resistant type was faster with than that of the sensitive one. This is not only an important character of drought adaptation, but also an important basis in distinguishing drought reshstant cultivars.45% high osmotic solvent PEG 600 had different effects on germination percentage, Length and weight of radicle among different drought fesistant types 4-4.5 hours after slowing water absorption of seeds. The germination percentage in drought resistant type is high and radicle growth is fast in contrast to those of the sensitive types. The result indicated that 45% PEG solution can be used for screening drought resistant types in soybean.更多还原