紫花苜蓿种子卫星搭载后其根尖细胞的生物学效应  

CYTOLOGICAL CHANGES OF ROOT TIP CELLS OF ALFALFA SEEDS AFTER SPACE FLIGHT

作　　者：任卫波[1] 徐柱[1] 陈立波[1] 郭慧琴[2] 王蜜[2] 赵亮[2] 

机构地区：[1]中国农业科学院草原研究所,内蒙古呼和浩特010010 [2]内蒙古农业大学生物工程学院,内蒙古呼和浩特010018

出　　处：《核农学报》2008年第5期566-568,共3页Journal of Nuclear Agricultural Sciences

基　　金：中央级公益性科研院所基本科研业务费专项资金(中国农业科学院草原研究所)资助项目;“十一五”国家科技支撑计划重点项目(2008BADB3B04)

摘　　要：为了解卫星搭载苜蓿细胞的生物学效应,3个品系的苜蓿干种子搭载"实践八号"育种卫星。返地后,制作根尖染色体切片,进行显微观察。结果表明,卫星搭载对细胞的正常有丝分裂表现为促进(品系二、四)或抑制(品系一)。搭载种子根尖细胞染色体出现了微核、染色体桥、断片、落后等畸变类型,畸变频率因搭载材料的诱变敏感性差异而不同。卫星搭载苜蓿种子对其根尖细胞有显著的诱变效应。To understand the cytological effects of space flight on alfalfa seeds, dry seeds of three lines （ Line 1, Line 2 and Line 4） were selected and loaded onto ＇Shijian No. 8＇ satellite for space flight. After returning to the ground, root tips of alfalfa were clipped and chromosome aberrations were observed by microscope. Data showed that space flight had two types of effect on cell mitotic： one was positive （Line 2, Line 4） and the other was negative （Line 1）. Such chromosome aberrations were observed as micronucleus, chromosome bridge, fragments, lagging and so on. The frequency of aberration varied with the different materials. Conclusion was that space flight had significant effect on root tip cells, which mainly showed as the chromosome aberrations.

关 键 词：卫星搭载 紫花苜蓿 染色体畸变 

分 类 号：S541.9[农业科学—作物学]