摘要
通过盆栽试验,研究了铅胁迫对12份禾本科牧草种质材料苗期株高、分蘖数、生物量、叶绿素及其脯氨酸、丙二醛(MDA)、超氧化物歧化酶(SOD)的耐铅性差异。结果表明:随着铅浓度的增加,12份禾本科牧草的叶绿素含量和地下生物量显著降低;株高、分蘖数、地上生物量表现出先上升后下降的趋势。选出的4份材料中,脯氨酸和MDA含量逐渐升高,而SOD呈现先上升后下降的趋势。通过隶属函数法对12份禾本科牧草种质的耐铅性进行综合评价,耐铅性较好的种是多年生黑麦草、其次是披碱草、无芒雀麦、鹅观草和高羊茅,耐铅性最差的种是长穗冰草。
A pot experiment was made to study the differences of lead Tolerance by lead stress on 12 torage grasses of plasm heights,tiller numbers,biomass,chlorophyll,proline,malondialdehyde （MDA）,superoxide dismutase （SOD）.The results showed that the chlorophyll content and the below ground biomass of the 12 forage grasses decreased significantly with increase of lead concentration ;the plant heights,the tiller numbers and the above ground biomass decreased after the first rise.Among the four selected materials,the proline and MDA increased,while SOD showed a downward trend after the first rise.According to the membership function,a comprehensive evaluation was made on the cadmium resistance of the 12 forage grasses：the perennial ryegrass has the best lead resistance,and then followed by Elymus,smooth bromegrass,Roegneria and Tall Fescue,while Agropyron has the worst lead resistance.
出处
《种子》
CSCD
北大核心
2014年第8期1-7,共7页
Seed
基金
国家"十二.五"科技支撑项目(编号:2011 BAD17 B01)
国家牧草产业体系(岗位专家)项目资助
关键词
禾本科牧草
苗期
铅胁迫
酶活性
综合评价
forage grasses
seedling
lead stress
enzyme activity
comprehensive evaluation
