外源维生素对盐胁迫下玉米种子萌发和某些生理指标的影响

Effects on Seed Germination and Physiological Indexes in Maize Under Salt Stress with Exogenous Vitamin

以玉米耐盐性品种“登海6213”和盐敏感品种“鲁单50”为材料，分别以0．001～10mmol／L的VB1、VB5、VB6和VC浸种24h，将浸泡过的种子分别置于蒸馏水和150mmol／L的NaCl溶液中进行暗萌发，观测种子的发芽率。结果表明1mmol／L的VB1能够有效缓解盐胁迫对种子萌发的抑制作用，而1mmol／L的VB5对正常条件下的种子萌发的促进效果最佳。用1mmoL／L的VB1浸种，均能提高两个品种的α，β-淀粉酶活性和可溶性糖含量。

The seeds of maize ＂ denghai 6213＂ with salt tolerance and ＂ludan50＂ with salt sensitive as materials, were soaked with 0. 001 - 10 mmol/L VB1 ,VB5 ,VB6 and VC for 24h as a pretreatment, then under two conditions： one was in the distilled water, the other was in 150mmol/L salinity for dark germination. The results showed that the inhibition of the germination could be significantly relieved by 1 mmol/L VB1 under the salt stress, and the seed germination of the maize could be evidently promoted by 1 mmol/L VB5 under non - salt stress. The activities of α and β amylase and the contents of the soluble sugar could be increased by soaking with 1mmol/L VB1.