CORNUS FLORIDA POLLEN ONTOGENY
| Autor: | E. T. Graham, Scott E. Schlarbaum, K. R. Malueg, Robert N. Trigiano |
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| Rok vydání: | 1995 |
| Předmět: | |
| Zdroj: | HortScience. 30:440g-441 |
| ISSN: | 2327-9834 0018-5345 |
| DOI: | 10.21273/hortsci.30.3.440g |
| Popis: | Development of Cornus florida L. pollen was monitored using standard paraffin histological techniques and light microscopy. Terminal buds (putative floral buds) were collected over a 6 weeks from mature landscape trees located on The Univ. of Tennessee Agricultural Campus, Knoxville. Examination of samples taken at 3- to 7-day intervals revealed variations in development representing 1- to 2-week differences between florets in a single inflorescence, florets on the same tree, and florets from different trees. Floral initiation occurred before 19 July in the 2 years of this study. Pollen development followed typical angiosperm stages: tapetal cells were multinucleate, pollen tetrads were tetrahedral, and meiosis occurred late in the developmental period. Pollen grains appeared morphologically mature by early September in both years. |
| Databáze: | OpenAIRE |
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