摘要
以藜麦品种伊藜早1号为试验材料,采用培养皿纸上发芽法,探讨不同浓度赤霉素(80、160、240、320、400、480 mg·L-1)浸种处理对藜麦(Chenopodium quinoa Willd.)种子萌发和幼苗生理特性的影响,以期为优化藜麦栽培技术和提高产量提供参考依据.结果表明:赤霉素(gibberellin,GA)可显著促进藜麦种子萌发,优化幼苗的生理状态,并且随赤霉素浓度的增加,各参数均呈先增加后降低的趋势.在240 mg·L-1 GA3浸种处理下,藜麦种子具有较高的活力,与对照相比,藜麦种子的发芽率、发芽势、发芽指数、活力指数、胚芽长和鲜质量分别显著升高9.34％、17.59％、10.73％、35.07％、25.56％、14.40％;过氧化物酶(POD)、过氧化氢酶(CAT)、可溶性蛋白和可溶性糖较对照显著升高68.69％、70.78％、31.79％、50.90％;与对照相比,脯氨酸含量显著降低39.71％.综上所述,当GA3浓度为240 mg·L-1时,作用效果最明显,显著提高了种子活力、发芽率和相关生理指标,是优化藜麦栽培的适宜浓度.
Abstract
Using quinoa variety Yilizao 1 as the experimental material,the paper-towel germination method in petri dishes was em-ployed to investigate the effects of seed soaking treatments with various concentrations of gibberellin(GA)(80,160,240,320,400,480 mg·L-1)on seed germination and seedling physiological characteristics of quinoa.The aim was to provide a reference for optimiz-ing quinoa cultivation techniques and enhancing yield.The results showed that Gibberellin(GA)significantly promoted quinoa seed germination and optimized the physiological state of seedlings.With increasing GA concentration,all parameters exhibited a trend of first increasing and then decreasing.Under soaking treatment with 240 mg·L-1 GA3,quinoa seeds exhibited high vigor,with significant increased in germination rate,germination energy,germination index,vigor index,plumule length,and fresh weight by 9.34％,17.59％,10.73％,35.07％,25.56％,and 14.40％,respectively,compared to the control.Peroxidase(POD),catalase(CAT),soluble protein,and soluble sugar levels were significantly increased by 68.69％,70.78％,31.79％,and 50.90％,respectively,compared to the control group.In contrast,proline content was significantly reduced by 39.71％compared to the control.In conclusion,when the GA3 concentration is 240 mg·L-1,the effect is most pronounced,significantly improving seed vigor,germination rate,and related physiological indicators.This concentration is suitable for optimizing quinoa cultivation.
维普
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