Cytological differentiation of the anthers tapetum in the tetraploid cytotype of Ranunculus fluitans Lam

• Autorzy: Turala-Szybowska K.
• Języki publikacji: EN

Abstrakty

EN

The cytological differentiation of the anthers’ tapetum in the tetraploid cytotype of Ranunculus fluitans Lam. (2n = 32) in relation to that in diploid cytotype of this species (Turała-Szybowska 1984) was studied. In the tetraploid plants the first acytokinetic mitosis is obligatory and leads to the formation of binucleate tapetal cells. Two further mitotic divisions do not comprise all cells. Contrary to the diploid cytotype, in the tetraploid these two mitoses most frequently, are not inhibited at prophase but may proceed further. The mitotic disturbances in the tapetal cells, like the bridges between two chromosome groups and the fusion of metaphase or anaphase plates result in the formation of a number of polyploid nuclei of irregular shapes. In the final stage, in different binucleate tapetal cells the nuclei evaluated as diploid, tetraploid or octoploid occur.

Słowa kluczowe

EN

somatic polyploidization; plant cytology; chromosome; tapetal cell; plant embryology; Ranunculus fluitans; cytotype; tapetum; differentiation

• Wydawca: -
• Czasopismo: Acta Biologica Cracoviensia. Series Botanica
• Rocznik: 1992-1993
• Tom: 34-35
• Opis fizyczny: p.37-42,fig.

Twórcy

autor

Turala-Szybowska K.

• Jagiellonian University, 31-044 Krakow, Grodzka 52, Poland

Bibliografia

• Bijok K. 1960. Studies in the karyological differentiation of the anthers’ tapetum in Chrysanthemum suhcorymbosum, Ch. segetum and Ch. corymbosum. Acta Biol. Crac. Ser. Bot. 3, 15-24.
• Carniel K. 1952. Das Verhalten der Kerne im Tapetum mit besonderer Berücksichtigung von Endomitosen und sogenannten Endomitosen. Öst. Bot. Z. 99, 318-362.
• Carniel K. 1963. Das Antherentapetum. Öst. Bot. Z. 110, 143-176.
• Cook C. D. K. 1962. Studies on Ranunculus L. subgenus Batrachium (DC.) A. Gray. I. Chromosome numbers. Watsonia 5, 123-126.
• Cook C. D. K. 1966. A monographic study of Ranunculus subgenus Batrachium (DC.) A. Gray. Mitt. Bot. München 6, 47-237.
• D’Amato F. 1984. Role of polyploidy in reproductive organs and tissues. In: Embryology of Angiosperms. Ed. B. M. Johri, Springer, Berlin, Heidelberg, New York.
• Titz W. 1965. Vergleichende Untersuchungen über den Grad den somatischen Polyploidie an nahe verwandten diploiden und polyploiden Sippen einschliesslich der Cytologie von Antipoden. Öst. Bot. Z. 112, 101-172.
• Turała K. and Urbańska-Worytkiewicz K. 1964. Cytological processes during the differentiation of the tapetal layer in Solanum dulcamara and S. nigrum. Acta Biol. Crac. Ser. Bot. 7, 171-183.
• Turała-Szybowska K. 1977. Karyological studies in Ranunculus fluitans Lam. from Thuringia and Vilnius with its surroundings. Acta Biol. Crac. Ser. Bot. 20, 1-9.
• Turała-Szybowska K. 1983. Disturbances in pollen development in diploid cytotype of Ranunculus fluitans Lam. Acta Biol. Crac. Ser. Bot. 25, 15-27.
• Turała-Szybowska K. 1984. Inhibited prophases in the differentiation of the anthers’ tapetum in Ranunculus fluitans Lam. Acta Biol. Crac. Ser. Bot. 26, 33-42.
• Zenkteler M. 1962. Microsporogenesis and tapetal development in normal and male sterile carrots (Daucus carota). Amer. J. Bot. 49, 341-348.