Showing papers on "Nigella damascena published in 1976"
TL;DR: The method of treating gametes, zygotes and proembryos with chemical and physical mutagens is, by all criteria, superior to that of treating dry seeds.
Abstract: An original technique has been developed of treating gametes, zygotes and early embryos of Nigella damascena L. with chemical and physical mutagens. A delay in fertilization and a decrease in the rate of cell division of the embryo and the endosperm after mutagen treatment have been found. Our method of treating gametes, zygotes and proembryos with chemical and physical mutagens is, by all criteria, superior to that of treating dry seeds. Treatment applied at early stages of ontogenesis not only induced a much higher mutation ratio compared with dry seeds, but also gave a broader mutation spectrum. The 55 types of hereditary change obtained affect the structure of vegetative and reproductive organs. Mutations which change the structure of the reproductive organs of flowers are of specific interest.
4 citations
01 Jan 1976
TL;DR: Owing to the authors' histological and genetical data, a female gametophytic origin could be mainly ascribed to EMS induced sterility, which could arise from a damage of the feeding function of the nucellus.
Abstract: EMS-induced sterility could be very partially due to chromosomal aberrations appearing during male and female meiosis or even to mechanical abnormalities of the double fertilization. The sterility could be also related to diplontic origin (lethal factors or small deficiencies appearing in homozygous state on account of self-pollinization). Owing to our histological and genetical data, a female gametophytic origin could be mainly ascribed to EMS induced sterility. It could arise from a damage of the feeding function of the nucellus.
2 citations