多花黑麦草对铝胁迫的生长生理响应  

Growth and physiological responses of Lolium multiflorum to aluminum stress

作　　者：吴亚[1] 陈思 张卫红[1] 刘大林[1] 范吉标 徐志鹏 沈瑜 Wu Ya;Chen Si;Zhang Wei-Hong;Liu Da-Lin;Fan Ji-Biao;Xu Zhi-Peng;Shen Yu(College of Animal Science and Technology,Yangzhou University,Yangzhou,Jiangsu 225000,China)

机构地区：[1]扬州大学动物科学与技术学院,江苏扬州225000

出　　处：《植物科学学报》2018年第5期755-760,共6页Plant Science Journal

基　　金：现代农业(奶牛)产业技术体系建设专项资金资助(CARS-36);江苏现代农业产业技术体系建设专项资金资助[JATS(2018)314]~~

摘　　要：以多花黑麦草(Lolium multiflorum Lam.)为材料,采用盆栽实验法,对其进行不同浓度铝(Al)的胁迫处理(0、100、200、300、400、500 mg/kg),并测定植株胁迫后的各项生长和生理指标。结果显示,Al胁迫会抑制多花黑麦草的生长和生物量的积累,Al^(3+)含量越高,其抑制作用越强。其中,土壤Al^(3+)含量为500 mg/kg时对植物株高和地上部的干重产生显著抑制作用;而当Al^(3+)含量为100 mg/kg时对植物根长和根干重产生显著抑制作用。叶绿素a、叶绿素b和叶绿素总量均随Al^(3+)含量的升高而降低,其中Al^(3+)含量为500 mg/kg时,叶绿素a、叶绿素b分别比对照下降了56.81%和46.57%。地上部和根系中的可溶性糖、游离脯氨酸、MDA含量和SOD活性均随Al^(3+)含量的升高而升高,且上述地上部4个指标均高于根系。We used a pot experiment to determine physiological and growth indicators of Lolium multiflorum Lam.under Al 3+stress(0,100,200,300,400,500 mg/kg).Results showed that aluminum stress inhibited the growth and biomass accumulation of ryegrass,with higher Al 3+content resulting in stronger inhibition.When Al 3+content in the soil was 500 mg/kg,plant height and shoot dry weight were significantly inhibited;however,when Al 3+content was 100 mg/kg,root length and root dry weight were significantly inhibited.Furthermore,chlorophyll-a,chlorophyll-b,and total chlorophyll in the leaves decreased with the increase in Al 3+concentration.When Al 3+content was 500 mg/kg,chlorophyll-a and chlorophyll-b decreased by 56.81%and 46.57%,respectively.However,soluble sugar content,free proline content,MDA content,and SOD activity in the above-ground shoot and below-ground root systems increased with the increase in Al 3+concentration;however,these four indicators were higher in the shoot than root system.

关 键 词：多花黑麦草 铝胁迫 生长特性 生理指标 

分 类 号：Q945.78[生物学—植物学]