引发激活对烟草种子发芽特性和幼苗抗冷性的效应研究  

Research on Effect of Seed Priming Treatment on Tobacco Seed Germination and Seedling Cold Resistant Capability

作　　者：梁文旭[1] 靳志丽 陈和春 张芳 

机构地区：[1]永州职业技术学院,湖南永州425000 [2]永州市烟草公司,湖南永州425000 [3]中国烟草中南农业试验站永州基地,湖南永州425000 [4]永州市烟草公司东安县分公司,湖南永州425000

出　　处：《河南农业科学》2012年第8期62-65,共4页Journal of Henan Agricultural Sciences

基　　金：湖南省烟草专卖局项目(05-004)

摘　　要：为明确引发处理对种子发芽特性及抗冷性的作用效果和机制,进行了引发种和普通种的发芽特性和抗冷性对比研究,结果表明:烟草种子经引发激活处理后,常温下和低温下种子活力指数较普通种分别提高122.2%和162.5%;常温下引发种萌发势、发芽势分别比普通种提高58.5、28.5个百分点,发芽速度和整齐度得到根本改善;引发种经过1～2a的贮存,发芽势和发芽率基本不受影响;低温胁迫期间,引发种幼苗游离氨基酸含量比普通种平均提高了22.0%,脯氨酸含量平均提高了50.4%,MDA含量平均降低了22.7%。由此可见,烟草种子经引发激活后,细胞膜自身修复能力和烟苗抗冷性明显增强。In order to find out the effect and mechanism of seed priming treatment on the tobacco seed germination and seedling cold resistant capability, the primed and non-primed seeds were studied in comparison. The results showed that the activity index of the primed seeds improved 122.2% in normal temperature and 162.5% in low temperature compared with the control seeds, respectively. And the germination potential and sprout potential of the primed seeds were im- proved 58.5 percentage points and 28.5 percentage points respectively in normal temperature, ameliorating the germination speed and uniformity ultimately. Moreover, the sprout potential and sprout rate of the primed seeds which had been deposited for 1--2 years were not influenced basi- cally. Under low temperature stress, the average accumulations of free amino acid and proline of the primed seedlings improved 22.0% and 50.4% ,and MDA reduced 22.7% in contrast to non- primed seeds. In addition, the permeability restoration of cell membrane and seedlings cold resistant capability were promoted by seed priming treatment.

关 键 词：烟草 种子 引发 发芽特性 抗冷性 

分 类 号：S572[农业科学—烟草工业]