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Biologia




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Volume 69, Issue 10

Issues

Microsporogenesis, pollen mitosis and pollen tube growth in Gagea villosa (Liliaceae)

Nuran Ekici
Published Online: 2014-11-07 | DOI: https://doi.org/10.2478/s11756-014-0439-8

Abstract

In this study, Gagea villosa (Bieb.) Duby was investigated by using light microscopy methods in cytological and cytoembryological respects. Anthers were tetrasporangiate. Anther wall was formed with an epidermis, endothecium, middle layer and tapetum. Tapetum was glandular type and it began to degenerate when microspores released from tetrads. Tapetum cells generally have one or two nuclei. Mitosis seen in tapetum cells was generally normal but micronuclei were found in some of them. Fibrous thickenings were determined in endothecium. Microsporogenesis and pollen mitosis were generally regular. Cytokinesis was successive type. Meiosis in pollen mother cells was asynchronous in one anther locus. Mature pollen grains were 2-celled. Pollen sterility was found to be 24%. Some of the fertile pollen grains, smaller than the normal were seen at the end of the pollen mitosis. Microgametophyte development was examined in vivo and in vitro. Germination ratio of pollen grains in vitro was 4%. Generally swollen pollen tube tips and weak development of some curled pollen tubes were seen. Callose plug formation was seen only in vivo pollen tube growth.

Keywords: Gagea villosa; Liliaceae; microsporogenesis; pollen tube

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About the article

Published Online: 2014-11-07

Published in Print: 2014-10-01


Citation Information: Biologia, Volume 69, Issue 10, Pages 1323–1330, ISSN (Online) 1336-9563, ISSN (Print) 0006-3088, DOI: https://doi.org/10.2478/s11756-014-0439-8.

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© 2014 Slovak Academy of Sciences. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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