摘要
The effects of different concentrations of manganous sulphate on root growth,cell division, chromosome and nucleus morphplogy and nucleoli in root tip-cells of Allium cepa L. were studied. The concentrations of manganous sulphate used were 10-7,10-6,10-5 ,10-4,10-3, 10-2 and 10-1mol/L. The results indicated that manganese had a stimulatory effect on the root growth at lower concentrations (10-7 to 10-4mol/L). With increasing the concentration of Mn (10-3 to 10-1mol/L) and duration of treatment,manganese inhibited root growth and cell division, and had toxic effects on chromosomes,nuclei and nucleoli. Manganese Could induce mitotic irregularities,comprising c-mitosis,anaphase bridges and chromosome stickiness. The nuclei became irregular in shape and many micronuclei were scattered in the cytoplasm. Some similar silver-stained particulate materials were found scattered in the nucleus in root tip cells. The possible mechanism behind these phenomena is also briefly discussed.
The effects of different concentrations of manganous sulphate on root growth,cell division, chromosome and nucleus morphplogy and nucleoli in root tip-cells of Allium cepa L. were studied. The concentrations of manganous sulphate used were 10-7,10-6,10-5 ,10-4,10-3, 10-2 and 10-1mol/L. The results indicated that manganese had a stimulatory effect on the root growth at lower concentrations (10-7 to 10-4mol/L). With increasing the concentration of Mn (10-3 to 10-1mol/L) and duration of treatment,manganese inhibited root growth and cell division, and had toxic effects on chromosomes,nuclei and nucleoli. Manganese Could induce mitotic irregularities,comprising c-mitosis,anaphase bridges and chromosome stickiness. The nuclei became irregular in shape and many micronuclei were scattered in the cytoplasm. Some similar silver-stained particulate materials were found scattered in the nucleus in root tip cells. The possible mechanism behind these phenomena is also briefly discussed.
出处
《华北农学报》
CSCD
北大核心
1994年第S2期1-7,共7页
Acta Agriculturae Boreali-Sinica
