摘要
用不同浓度的亚硒酸钠溶液分别处理大蒜根尖6小时,18小时和24小时,发现硒对大蒜根尖细胞的毒害作用与其浓度和作用时间有关:当处理时间≤18小时、硒的浓度≤1μg/ml时,促进大蒜根尖细胞的有丝分裂;反之则抑制,说明硒具有二重性。同时还观察到染色体畸变现象。
With the different concentration of Na2SeO3 were used separately to treat the root tip of garlic for 6h, 18h,24h,the result showed that the effect of Se on the root tip cells of garlic is in contract with its concentration and time; when the time isn＇t over 18h and the concentration isn＇t also over 1μg/ml, it can promote the mitosis of root tip cells of garlic; if not, restrained, it turned out Se has two sides. At the same time observed the chromosome aberration phenomenon.
关键词
大蒜
硒
有丝分裂指数
微核
garlic
Se
mitosis index
micronucleus
