摘要
本文报道了不同剂量(1万仑、1.5万仑、2万仑、2.5万仑和3万仑)^(60)C_oγ—射线照射小麦干种子后,对发茅势、发芽率、初生根长度和根尖分生组织细胞有丝分裂和花粉母细胞减数分裂的影响. 电离辐射损伤引起根尖分生组织细胞有丝分裂的抑制作用随着剂量的增大而增强.并借助细胞学的方法观察了根尖分生组织细胞有丝分裂和花粉母细胞减数分裂中由于电离辐射所引起的染色体畸变,如小核(微核)、断片、桥、落后染色体、不均等分裂、染色质团缩、染色体环等细胞形态学变化.
This paper presents the effects of the irradiation by ^(60)C_0 γ-ray (dose: 10KR, 15KR, 20KR, 25KR, 30KR) on germination capacity and percentage, primary root length, root tip cell mitosis and pollen mother cell meiosis of dry wheat seeds.The inhibition resulting from the injuries of ionizing radiation on the root tip cell mitosis increases with the increasing doses. Using cytological method, we observed the aberrations of the root tip cell mitosis and the pollen mother cell meiosis, including micronucleus, chromosome fragment and bridge, late replication chromosome, unegual division, heteropycnosis and ring chromosome.
出处
《山东师范大学学报（自然科学版）》
CAS
1989年第4期47-53,共7页
Journal of Shandong Normal University(Natural Science)
关键词
小麦
照射
有丝分裂
减数分裂
种子
^(60)C_oγ-ray
mitosis
meiosis
Triticum aestivum L
