NaCl和PEG引发对甘蓝种子发芽及其质膜透性的影响

以晚丰一代、中甘11号甘蓝品种为材料,用100 mmol.L-1NaCl和25%PEG-6000在20℃下进行种子引发处理,研究了引发处理对种子发芽和相对电导率的影响。结果表明:用25%PEG-6000对两个甘蓝品种进行引发处理24 h,可促进种子迅速发芽、出苗,提高种子发芽势、发芽率、发芽指数和活力指数。用100 mmol.L-1NaCl对中甘11号种子进行引发24 h,在一定程度上也可以促进种子发芽,但对两个品种种子的伤害也较明显。供试的两个甘蓝品种耐逆性存在差异,中甘11号耐盐性要强于晚丰一代。用100 mmol.L-1NaCl引发两个甘蓝品种的种子24 h、25%PEG-6000引发48 h,都显著地降低了种子的相对电导率。

Influence of NaCl and PEG Priming on Germination and Plasma Permeability of Cabbage Seeds

With utilization of Wanfeng No.1 and Zhonggan No.11 varieties,priming of seeds was conducted by 100 mmol·L-1 NaCl and 25%PEG-6000 at 20 ℃.The effect of priming on germination of seeds and relative electrical conductivity were studied.The results showed that 24 h priming on two cabbage varieties by 25%PEG-6000 coued rapidly promote germination and emerge of seedlings of seeds and improve germination energy,germination rate,germination indexes and activity indexes.Twenty four hours priming on Zhonggan No.11 by 100mmol·L-1 NaCl could promote germination of seeds to some extent,but this treatment had obvious damage to the seeds of the two varieties.Stress-resistances of the two varieties were different.Relatively,stress-resistances of Zhonggan No.11 was better than that of Wanfeng No.1.Twenty-four hours priming on the seeds of the two cabbage varieties by 100 m mol·L-1 NaCl and 48 h priming on them by 25%PEG-6000 were both able to lower relative electrical conductivity of seeds significantly.