The feeding activity of Plutella xylostella in brassica crops can lead to large losses; thus, pesticides that prevent during the larval stage or metamorphosis this insect be used for its control. In study, effects two types aqueous extracts Tradescantia pallida on different life P. cycle were tested; neither extracts, which obtained by infusion and maceration, had been tested against xylostella...

In the previous paper (Wada, Nagao and Awasawa 1963), we have demonstrated the presence of spindle membrane in fixed preparations of root tip cells in Vicia faba and Allium cepa. These materials are most familiar in the laboratory for observations of mitosis in somatic cells and their mitotic figures are described in text-books of cytology as a standard type of somatic cell division. In this pa...

Ring chromosomes, long of interest in cytogenetics, have been intensively studied in corn and Drosophila (McClintock, 1932, 1938; Morgan, 1933; Battacharya, 1950) and also described in Crepis, Tulipa, Tradescantia, and other species. In the past few years, a number of reports of ring chromosomes in man have appeared (Table I). We recently encountered a mentally retarded patient with multiple co...

REVIOUS experiments have shown that quantitatively the response P of chromosomes of Vicia faba in pachytene to X-rays is approximately the same as that of the same species at the onset of the somatic prophase (MARSHAK 1939a). CREIGHTON (1941) using methods similar to those employed in the Vicia studies found that meiotic chromosomes are only a sixth as sensitive as the mitotic chromosomes in Ch...

Tradescantia pollen grains, isolated during the period of DNA synthesis in the generative cell, accumulate deoxythymidine triphosphate (dTTP)-(3)H after incubation with thymidine-(3)H in the presence of millimolar deoxyadenosine. Most of this dTTP-(3)H was found to resist extraction by the fixative, cold ethanol-acetic acid, and its location was investigated by radioautography with thin, dry em...

The influence of cobalt doping in SnO2 crystal lattice tailored the optical, structural, and surface properties SnO2. Co2+ was successfully doped (Co-SnO2) via green synthesis using Tradescantia spathacea aqueous leaf extract. Powder X-ray diffraction patterns synthesized nanoparticles showed a rutile structure with no impurities. As Co-doping increased, average crystallite size increased from ...

Aim of the study was to monitor changes of genotoxic activity of urban air caused by an incinerator and a petrochemical plant in Tradescantia micronucleus (Trad-MCN) and pollen fertility assays with wild plants (Chelidonium majus, Clematis vitalba, Cichorium intybus, Linaria vulgaris, Robinia pseudoacacia). While in the first sampling period (1997-2000) significantly (on average 80%) more MN we...