| 摘要: |
| 【目的】明确不同外源维生素对甜玉米种子萌发及幼苗生长的影响,探讨提高甜玉米种子萌发率及培育壮苗的方法，为生产中选用维生素浸种提供参考。【方法】以储存1年以上的甜玉米品种“中甜1号”为试验材料，用不同质量浓度(10，50，100，200 mg/L)的VB1、VB2、VB6、VB12、VPP、VM和VC在25 ℃条件下浸种24 h后播种，研究甜玉米种子萌发期和幼苗期对VB1、VB2、VB6、VB12、VPP、VM和VC处理的生理响应。【结果】除维生素B6(VB6)外，VB1、VB2、VB12、VPP、VM和VC处理都有一个或者几个质量浓度浸种处理对甜玉米种子的萌发和幼苗生长表现出不同程度的促进作用，其中以50～100 mg/L VC、VPP处理效果较好，显著提高了甜玉米种子萌发率和幼苗苗高、根长、根冠比及根系活力，幼苗质量高。VC浸种可以显著提高甜玉米幼苗的超氧化物岐化酶(SOD)和过氧化物酶(POD)活性，降低MDA的含量。【结论】外源VC和VPP可以作为研制甜玉米种子处理剂的材料。 |
| 关键词: 维生素 甜玉米 种子萌发 幼苗生长 |
| DOI： |
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| 基金项目:国家公益性行业(农业)科研专项 (201203013-5) |
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| Effects of seed soaking with exogenous vitamin on seed germination and seedling growth of sweet corn |
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LI Zhen-lun,HE Kai,SHI Wen-hao,et al
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| Abstract: |
| 【Objective】This study determined the effects of exogenous vitamins on seed germination and seedling growth of sweet core to search for method of improving seed germination rate and breeding strong seedling.【Method】‘Zhongtian No.1’ sweet corn that had been stored for more than one year was used as material to investigate the effects of seed soaking with exogenous vitamins (VB1,VB2,VB6,VB12,VPP,VM,and VC)at different concentrations (10,50,100 and 200 mg/L) on seed germination and seedling growth.【Result】Seed germination and seedling growth of sweet core were enhanced by all vitamins at one or more concentrations except VB6.The best treatments were VC and VPP with concentrations of 50-100 mg/L,which significantly increased the seed germination rate,seedling height,root length,root to shoot ratio and activity of root system.VC treatment significantly increased the activities of superoxide dismutase (SOD) and peroxidase (POD),and decreased the content of malondialdehyde (MDA) in sweet corn seedling. 【Conclusion】Exogenous vitamins could be used for production of agents to improve germination and growth of sweet corn. |
| Key words: vitamin sweet corn seed germination seedling growth |
