为明确不同外源维生素浸种对玉米种子萌发及幼苗生长的影响。本研究以玉米杂交种“郑单958”为试验材料，采用不同质量浓度50、100、200 mg/L的维生素VB1、VB2、VB6、VB12、VC、VH、VPP浸种24 h后播种，分析玉米种子萌发和幼苗生长以及脯氨酸等可溶性调节物质情况。供试维生素在100 mg/L和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浓度维生素处理对种子萌发率促进效果显著，其中VC处理促进效果最为明显；200 mg/L处理下均呈现对种子发芽势的显著促进作用；50 mg/L维生素对上述三个指标在的影响出现分歧。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玉米幼苗根冠比影响不同，可以划分为四种类型：显著促进型，包括VB1、VB2和VB12；显著抑制型，包括VB6；显著促进和显著抑制混合型，包括VH和VC；促抑均不显著的包括VPP。另外，维生素浸种均可引起玉米幼苗可溶性糖含量显著升高，但对玉米幼苗脯氨酸含量大致可以分为两类：一类是三个浓度表现基本一致，呈显著抑制的类型，包括VB2、VB6、VH和VPP；另一类是三个浓度表现不同。结果表明，外源维生素浸种处理可显著改变玉米种子萌发和幼苗生长，而且不同维生素在不同浓度下对各生长指标影响不尽相同，脯氨酸等可溶性调节物质变化也不尽相同。
英文摘要:
To identify different exogenous vitamin seed treatments on maize seed germination and seedling growth.In this suty,the maize hybrid “Zhengdan 958”was used as the experimental,soaking seeds with vitamins VB1, VB2, VB6, VB12, VC, VH and VPP with different concentrations of 50, 100 and 200 mg/L for 24 h, Analysis of maize seed germination and seedling growth and proline and soluble regulating substances.The tested vitamins showed the promotion of seed germination index at 100 mg/L and 200 mg/L, Among them, 100 mg/L vitamin treatment significantly promoted seed germination rate, of which the promotion effect of VC treatment was the most obvious;The significant promotion effect of 200 mg/L treatment on seed germination potential;50 mg/L vitamin of the above three indicators in the impact of differences.Compared with the untreated control, different kinds of vitamin and mass concentration of the same vitamin effect on corn seedling root cap ratio is different, can be divided into four types:Significantly promote the type?including VB1, VB2 and VB12;Significantly inhibited type, including VB6.Significantly promote and inhibit the mixed type, including the VH and VC;To promote and inhibit including VPP were not significant.In addition, vitamin seed treatments can cause a significant rise in corn seedling soluble sugar content, but the proline content of maize seedlings can be roughly divided into two groups:One is the three concentrations showed basically the same, including VB2, VB6, VH and VPP; The other is the performance of three different concentrations. The results showed that exogenous vitamin seed handling can significantly change the corn seed germination and seedling growth, under different concentrations and different vitamins in different effects on the growth index, proline and soluble adjusting material changes are also different.
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