CYTOLOGICAL STUDIES IN ALLIUM, II CHROMOSOME MORPHOLOGICAL CONTRIBUTIONS

Genetical and Cytological Studies in Allium I. Spontaneous and Induced Variations of Chromosome Number in the Pollen Grains of Tetraploid Allium Odorum L

Since L. Guignari's investigation (1884) various investigators have reported the studies on plants in the genus Allium of Liliaceae, as some species in this genus are cultivated and are noteworthy from the cytological point of view. According to T. Suto's papers (1936, 1936) on the phylogenetic discussion of Liliaceae and Amaryllidaceae, which show the fact that the idiogram type of the chromos...

Spontaneous Chromosome Aberrations in Allium.

ROSS chromosome aberrations or rearrangements have recently G come to occupy an important position in the study of problems of evolution and speciation. Such aberrations are known to occur in many plants and animals. However, the spontaneous occurrence of these aberrations is rather difficult to study, since their frequency is usually very low. In an endeavor to obtain a further understanding o...

Cytological Studies on Siderocytes in Equine Infectious Anemia : I. Morphological Studies on Siderocytes

Hybrid Dysgenesis in DROSOPHILA MELANOGASTER: Morphological and Cytological Studies of Ovarian Dysgenesis.

A type of intraspecific hybrid sterility, between two strains of Drosophila melanogaster, referred to as GD (gonadal dysgenesis) sterility, is observed when females from a type of strain called M are crossed with males from a second type called P. Absence of egg-laying is characteristic of female GD sterility and its manifestation is conditional on high developmental temperatures. Morphological...

Cytological effects of medicinal plants in Qatar. II. Mitotic effect of water extract of Teucrium pilosum on Allium cepa.

In this survey the effect of water extract of Teucrium pilosum on mitosis of Allium cepa was studied. Teucrium pilosum is a perrenial plant, not grazed by animals and its extract is used natively against constipation and as antispasmotic. Results and discussion Table 1 shows that the extract affected the mitotic index, percentage of phases and percentage of abnormal cells. Inhibition of mitotic...