PEG引发对小冠花种子萌发及幼苗生理特性的影响

Effects of PEG priming on seed germination andphysiological characteristics of seedlingsof Coronilla varia

摘要:

以小冠花为试材,研究不同浓度PEG (0%、10%、20%和30%)引发处理对小冠花种子萌发和幼芽生理特性的影响。结果表明:10%、20% PEG引发处理显著提高了小冠花种子的发芽势、发芽率、发芽指数和活力指数,10%PEG引发处理下小冠花幼芽生长高于未引发处理;10% PEG引发处理显著提高了小冠花幼芽可溶性糖、可溶性蛋白和脯氨酸含量及过氧化氢酶、过氧化物酶和超氧化物歧化酶活性,并显著降低了幼芽细胞电解质渗透率。说明10% PEG引发处理可提高小冠花幼芽渗透调节能力和酶活性,促进种子萌发和幼芽生长。

Abstract:

Coronilla varia was used as the test material to study the effects of different concentrations (0%,10%,20% and 30%) of PEG on the seed germination and physiological characteristics of seedlings.The results showed that the germination potential,germination percentage,germination index and vitality index were significantly increased under the treatments of 10% and 20% of PEG.The growth of seedlings was significantly promoted under 10% PEG treatment compared to the control.The treatments of 10% PEG significantly increased the contents of soluble sugar,proline and soluble protein,and the activity of CAT,POD and SOD in seedlings,while the cell electrolyte permeability was significantly decreased.It was concluded that PEG with the proper concentration could effectively improve the osmotic regulation,and promote the growth of Coronilla varia seedlings.