不同盐分胁迫对玉米种子萌发的影响

Effect of Salt Stress on Germination of Three Varieties of Zea mays L. Seeds

研究玉米种子萌发及幼苗生长过程中各项指标在不同NaCl浓度胁迫处理下的变化。分别配置浓度为0、30、90、150、210、270mmol/L NaCl溶液,并用各浓度的溶液将滤纸浸泡至饱和,在培养皿中对3个不同品种的玉米种子进行萌发胁迫试验,并测量幼苗的苗高及根长。试验结果表明:在NaCl溶液胁迫下3种玉米种子发芽率降低,发芽指数以及活力指数等各项指标均受到不同程度的抑制。幼苗生长过程中苗高和根长亦受到抑制。不同NaCl浓度胁迫对玉米种子萌发过程及幼苗生长过程具有显著抑制作用,在供试的3份材料中,'农大3138'盐胁迫对其种子萌发速度、幼苗生长势的影响较小,表现出较强的耐盐能力。

The main purpose of the experiment in the paper is to study the change of three targets including germination percentage,vitality index and germination index of corn seed germination process and the growth process of corn seedling under the different salt stress treatment.The concentration of NaCl solution was 0,30,90,150,210,270 mmol/L,which had been deployed separately,and the filter paper had been soaked to the saturated condition by the each concentration NaCl solution.The experiment that salt stress in corn seed germination process had been finished in culture dish and the seedling height and the root length of corn had both been measured.Germination percentage,vitality index and germination index of three corn seed germination process had all been restrained by NaCl solution in varying degrees.And the growth tends of the seedling height and the root length were restrained,too.Different salt stress treatment had such an obvious restraining function to three corn seed germination process.Among three experiment materials ＇Nongda3138＇ do well in the seed germination speed and the seedling growth tends under salt stress experiment.