水合与渗透激发对洋葱 (Allium cepa L .)种子的萌发及幼苗形成的影响(英文)

The Effect of Hydro- and Osmopriming on Germination and Seedling Emergence of Onion (Allium cepa L.) Seeds

把 3个样品的洋葱种子分别放在聚乙烯乙二醇 (PEG分子量 80 0 0 ,渗透势 - 1 .5Mpa)溶液中 ,在 1 5℃温度下浸泡处理 7d .然后 ,把它们冲洗干净并干燥 .另外 ,把 3个样品的洋葱种子分别放入装有通气的蒸馏水的圆柱管里 ,在 2 0°C温度下浸泡处理 6h ,然后进行干燥 .在本实验中发现如果和没有处理过的种子相比较 ,用PEG处理过的洋葱种子表现出种子萌发速度加快并且加速了幼苗的形成速度 .但是并没有改善甚至降低了种子萌发的百分比和萌发能力 .然而 ,用蒸馏水浸泡处理过的种子却没有表现出种子萌发速度和幼苗形成速度的加快 ,并且表现出种子萌发的百分比和萌发能力的降低 .

onion (Allium cepa L) seed samples were osmotically primed in polyethylene glycol solution (PEG 8?000) at -1.5?MPa for 7?d in darkness at 15℃ and then they were washed,rinsed and dried.Other these seed samples were also hydrated for 6h at 20℃ in Perspex columns containing aerated distilled water and after that were dried.Osmopriming accelerated seed germination to the largest extent,but did not improve or even decreased the percentage of germinating seeds and germination capacity.Osmopriming accelerated an...