Anther Ontogeny and Microsporogenesis in <i>Helianthus annuus</i> L. (Compositae)
In this study, anther ontogeny and microsporogenesis were analysed in Helianthus annuus L. The undifferentiated anther is ovoid-shaped and the differentiation starts with the appearance of archesporial cells. Mature anthers are tetrasporangiate. The anther wall is composed of epidermis, endothecium,...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Society of Land Measurements and Cadastre from Transylvania (SMTCT)
2015-03-01
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| Series: | Notulae Scientia Biologicae |
| Online Access: | http://www.notulaebiologicae.ro/index.php/nsb/article/view/9474 |
| _version_ | 1818013846178103296 |
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| author | Aslihan ÇETİNBAŞ Meral ÜNAL |
| author_facet | Aslihan ÇETİNBAŞ Meral ÜNAL |
| author_sort | Aslihan ÇETİNBAŞ |
| collection | DOAJ |
| description | In this study, anther ontogeny and microsporogenesis were analysed in Helianthus annuus L. The undifferentiated anther is ovoid-shaped and the differentiation starts with the appearance of archesporial cells. Mature anthers are tetrasporangiate. The anther wall is composed of epidermis, endothecium, middle layer and plasmodial tapetum. Endothecial cells show no fibrous thickening. Tapetum is amoeboid type with binucleate cells. Epidermal layer remains intact until anther dehiscence; however, middle layer, endothecium and tapetum disappear during development. At the end of regular meiotic division tetrahedral microspore tetrads are formed. Pollen grains are triporate, suboblate and angulaperturate. |
| first_indexed | 2024-04-14T06:38:17Z |
| format | Article |
| id | doaj.art-563f34fb9a8f4adb8c20ff121a80fca7 |
| institution | Directory Open Access Journal |
| issn | 2067-3205 2067-3264 |
| language | English |
| last_indexed | 2024-04-14T06:38:17Z |
| publishDate | 2015-03-01 |
| publisher | Society of Land Measurements and Cadastre from Transylvania (SMTCT) |
| record_format | Article |
| series | Notulae Scientia Biologicae |
| spelling | doaj.art-563f34fb9a8f4adb8c20ff121a80fca72022-12-22T02:07:25ZengSociety of Land Measurements and Cadastre from Transylvania (SMTCT)Notulae Scientia Biologicae2067-32052067-32642015-03-0171525610.15835/nsb7194748116Anther Ontogeny and Microsporogenesis in <i>Helianthus annuus</i> L. (Compositae)Aslihan ÇETİNBAŞ0Meral ÜNAL1Marmara University, Department of Biology, Göztepe Campus, IstanbulMarmara University, Department of Biology, Göztepe Campus, IstanbulIn this study, anther ontogeny and microsporogenesis were analysed in Helianthus annuus L. The undifferentiated anther is ovoid-shaped and the differentiation starts with the appearance of archesporial cells. Mature anthers are tetrasporangiate. The anther wall is composed of epidermis, endothecium, middle layer and plasmodial tapetum. Endothecial cells show no fibrous thickening. Tapetum is amoeboid type with binucleate cells. Epidermal layer remains intact until anther dehiscence; however, middle layer, endothecium and tapetum disappear during development. At the end of regular meiotic division tetrahedral microspore tetrads are formed. Pollen grains are triporate, suboblate and angulaperturate.http://www.notulaebiologicae.ro/index.php/nsb/article/view/9474 |
| spellingShingle | Aslihan ÇETİNBAŞ Meral ÜNAL Anther Ontogeny and Microsporogenesis in <i>Helianthus annuus</i> L. (Compositae) Notulae Scientia Biologicae |
| title | Anther Ontogeny and Microsporogenesis in <i>Helianthus annuus</i> L. (Compositae) |
| title_full | Anther Ontogeny and Microsporogenesis in <i>Helianthus annuus</i> L. (Compositae) |
| title_fullStr | Anther Ontogeny and Microsporogenesis in <i>Helianthus annuus</i> L. (Compositae) |
| title_full_unstemmed | Anther Ontogeny and Microsporogenesis in <i>Helianthus annuus</i> L. (Compositae) |
| title_short | Anther Ontogeny and Microsporogenesis in <i>Helianthus annuus</i> L. (Compositae) |
| title_sort | anther ontogeny and microsporogenesis in lt i gt helianthus annuus lt i gt l compositae |
| url | http://www.notulaebiologicae.ro/index.php/nsb/article/view/9474 |
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