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Pollen of Ceratostema (Ericaceae, Vaccinieae): tetrads without septa |
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| Authors: | A K M Golam Sarwar Toshiaki Ito Hideki Takahashi |
| Institution: | (1) Laboratory of Systematic Botany, Graduate School of Agriculture, Hokkaido University, North 8 West 8, Sapporo 060-8589, Japan;(2) Laboratory of Electron Microscopy, Graduate School of Agriculture, Hokkaido University, North 8 West 8, Sapporo 060-8589, Japan;(3) The Hokkaido University Museum, North 10 West 8, Sapporo 060-0810, Japan |
| Abstract: | The pollen morphology of two species of the Neotropical genus Ceratostema (Ericaceae) was examined by light, scanning and transmission electron microscopy. The Ceratostema species examined have 3-colporate pollen grains united in permanent tetrahedral tetrads that show a common condition encountered in the Ericaceae. But the septal exine was absent between two neighboring grains in each pollen tetrad of Ceratostema. The pollen tetrads without septa are the first report for the Ericaceae as well as other angiosperm families. |
| Keywords: | Ceratostema Pollen morphology Tetrad without septum |
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