Pollen of Ceratostema (Ericaceae, Vaccinieae): tetrads without septa.
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.
Sarwar
A K M Golam
AK
Laboratory of Systematic Botany, Graduate School of Agriculture, Hokkaido University, Sapporo, Japan. sarwar@museum.hokudai.ac.jp
Ito
Toshiaki
T
Takahashi
Hideki
H
D029791:Ericaceae / Q000033:anatomy & histology*; D008855:Microscopy, Electron, Scanning; D011058:Pollen / Q000166:cytology* / Q000648:ultrastructure