不同质量浓度的Pb对紫花苜蓿种子萌发的胁迫效应  

EFFECTS OF DIFFERENT CONCENTRATIONS OF LEAD ACETATE ON GERMINATION OF ALFALFA SEEDS

作　　者：罗巧玉[1] 杨生兰 才让措[1] 马永贵[1] LUO Qiao-yu(Key Laboratory of Medicinal Plant and Animal Resources of Qinghai - Tibet Plateau in Qinghai Province,Qinghai Normal University,Xining Qinghai 810008,China)

机构地区：[1]青海省青藏高原药用动植物资源重点实验室青海师范大学,青海西宁810008

出　　处：《青海草业》2018年第2期2-6,共5页Qinghai Prataculture

基　　金：校级中青年科研基金项目(15ZR06);青海省科技厅项目(2017-ZJ-774)

摘　　要：采用培养皿滤纸萌发实验,研究不同质量浓度的Pb(CH_3COO)_2·3H_2O溶液(0、25、100、400、1600mg/L)对紫花苜蓿种子萌发的胁迫作用。结果表明,低质量浓度的Pb(CH_3COO)_2·3H_2O(≦100mg/L)显著促进紫花苜蓿的萌发参数。随着Pb(CH_3COO)_2·3H_2O质量浓度的逐渐提高,对紫花苜蓿种子的萌发胁迫作用不断增强,当Pb(CH_3COO)_2·3H_2O的质量浓度达到400和1600mg/L时,紫花苜蓿种子的萌发和幼苗的生长则受到显著抑制。表明随着Pb(CH_3COO)_2·3H_2O质量浓度的提高,紫花苜蓿种子的萌发和幼苗的生长受到的抑制作用越来越强。The effects of lead acetate solution on the seed germination of alfalfa were studied by using the cul？ture experiment of the filter paper to study the seed germination of six different concentrations（0、25、100、400、1600 mg / L）. The results showed that germination rate,germination potential,germination index and germinationvigor index were significantly improved by low concentration of lead acetate. With the increase of the concentration of lead acetate, the germination stress of alfalfa seeds was increasing, and the germination and seedinggrowth of alfalfa seeds were significantly inhibited when the mass concentration of lead acetate reached 400 and1600 mg / L. The results showed that the germination and seeding growth of alfalfa seeds were more and more in？hibited with the increase of the concentration of lead acetate.

关 键 词：紫花苜蓿 PB 胁迫效应 种子萌发 

分 类 号：S812.5[农业科学—草业科学]