中国草地学报2025，Vol.47Issue(7)：21-29,9.DOI:10.16742/j.zgcdxb.20240491
60Co-γ辐射对梯牧草种子萌发及幼苗生长的影响
Effects of 60Co-γ Radiation on Seed Germination and Seedling Growth of Phleum pratense
摘要
Abstract
This research aims to investigate the effects of different radiation doses of 60Co-γ ray on seed germination and seedling establishment of timothy(Phleum pratense),and to determine the optimal muta-gen dose.Timothy seeds were exposed to different doses of 60Co-γ radiation(100,150,200,250,300,350,and 400 Gy)and non-irradiated seeds were served as the control.The results showed that all radia-tion doses decreased germination percentage,germination energy,and germination index.Radicle and plu-mule lengths decreased with the increasing radiation doses,except that plumule lengths increased at 100,150,and 200 Gy and 100 Gy increased radicle length.Aboveground morphology parameters(plant height,leaf width,and tiller number),root development parameters(total root length,root surface area,root vol-ume,and root average diameter),and chlorophyll content in timothy seedlings all exhibited an trend of ini-tial increase followed by a decline.Linear regression analysis,determined the semi-lethal dose(LD50)of 60Co-γ radiation for dry timothy seeds was to be 204.2 Gy.关键词
60Co-γ辐射/梯牧草/种子萌发/幼苗形态/根系形态/叶绿素含量/半致死剂量Key words
60Co-γ radiation/Timothy(Phleum pratense)/Seed germination/Seedling morphology/Root morphology/Chlorophyll content/Semi-lethal dose分类
农业科技引用本文复制引用
崔莹,李志华,张夏香,任春华,王怡婷,何法慧,杨志民..60Co-γ辐射对梯牧草种子萌发及幼苗生长的影响[J].中国草地学报,2025,47(7):21-29,9.基金项目
中央财政林业科技与推广示范项目(苏[2023]TG1) （苏[2023]TG1）
