不同维生素浸种对玉米种子萌发的影响

以玉米杂交种郑单958为试验材料,采用不同质量浓度50、100、200 mg/L的水溶性维生素V_(B1)、V_(B2)、V_(B6)、V_(B12)、V_C、V_H、V_(PP)浸种24 h,处理后分析玉米种子萌发及胚芽和根生长中脯氨酸等可溶性调节物质情况。结果表明,供试维生素在100、200 mg/L处理下基本都呈现对种子萌发指数的促进,其中,100 mg/L维生素处理对种子萌发率促进效果显著;200 mg/L维生素处理对种子发芽势显著促进作用;50 mg/L维生素对上述3个指标的影响不同。与未处理对照相比,不同种类维生素和不同质量浓度的同一维生素对根冠比影响不同。维生素浸种均可引起玉米胚芽可溶性糖含量显著升高,外源维生素浸种处理可显著影响玉米种子萌发和胚芽及胚根的生长,且不同维生素在不同浓度下对各生长指标影响及脯氨酸等可溶性调节物质变化不尽相同,对种子萌发呈显著促进作用的V_(B2)和V_(B12)在玉米种子萌发中应用前景较好。

Effects of Different Vitamin Solutions on the Seed Germination of Maize

In this study, we used six kinds of exogenous vitamin(V_B1, V_B2, V_B6, V_B12, V_C, V_H and V_PP) to tested their effects on seed germination. For each vitamin, we soaked the seeds of maize hybrid Zhengdan958 for 24 h at 50, 100 and 200 mg/L, respectively. The seed germination rate and the contents of proline and other soluble substances in plumule and radicle were analyzed. All the tested vitamins at 100 mg/L and 200 mg/L would promote seed gemination, with 100 mg/L and 200 mg/L vitamin solutions significantly increased seed germination rate and seed germination potential, respectively. While 50 mg/L vitamin solutions influenced the indexes of seed gemination in different ways. In addition, different vitamins had different effects on the root-shoot ratio of seedlings, with V_B1, V_B2 and V_B12 solutions had promotion effects while V_B2 solutions had inhibition effects. All vitamin solutions could increase the soluble sugar content significantly, while they acted on proline in different ways. In total, exogenous vitamins could significantly affect maize seed germination such as plumule and radicle growth, while the effects of different vitamins were different. Among them, V_B2 and V_B12 had the best effect on seed germination.