|
Hokkaido University Collection of Scholarly and Academic Papers >
Field Science Center for Northern Biosphere >
Peer-reviewed Journal Articles, etc >
Pollen morphology of Rhododendron L. and related genera and its taxonomic significance
| Title: | Pollen morphology of Rhododendron L. and related genera and its taxonomic significance |
| Authors: | Sarwar, A.K.M. Golam Browse this author | | Takahashi, Hideki Browse this author →KAKEN DB |
| Keywords: | Pollen morphology | | Rhododendron | | Infrageneric classification | | Generic delimitation | | Rhodoreae |
| Issue Date: | 2013 |
| Publisher: | The Bangladesh Association of Plant Taxonomists |
| Journal Title: | Bangladesh Journal of Plant Taxonomy |
| Volume: | 20 |
| Issue: | 2 |
| Start Page: | 185 |
| End Page: | 199 |
| Publisher DOI: | 10.3329/bjpt.v20i2.17393 |
| Abstract: | Pollen grains of 40 taxa of Rhododendron L. and its closely related genera, Therorhodion L. and Menziesia Sm., were examined by means of light microscopy and scanning electron microscopy (SEM), or SEM alone. Pollen tetrads of R. japonicum, R. schlippenbachii, R. tsusiophyllum and M. pentandra were examined also withtransmission electron microscopy. In all the genera studied, 3-colporate, oblate tosuboblate pollen grains are arranged in tetrahedral tetrads. The apocolpial pollen wall is composed of the exine - well developed tectum, columellae, foot layer and endexine, and the intine. On the contrary, the septal exine is composed of fragmentary tectum, and the two foot layers of adjacent grains are sometimes connected by columellae and endexine. Among different infrageneric taxa only the subsect. Ledum (sect. & subgen. Rhododendron) was characterized by small sized pollen tetrads, higher 2f/D value and rugulate exine sculpture. The pollen morphological characteristics overlapped each other in all other taxa. Thus palynological features showed little usefulness in the infrageneric classification of Rhododendron, however, they gave additional support to the individualgeneric status of Menziesia and Tsusiophyllum, and the sister relationship between Rhododendron and Therorhodion. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/55269 |
| Appears in Collections: | 北方生物圏フィールド科学センター (Field Science Center for Northern Biosphere) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
|
Submitter: Sarwar, A.K.M. Golam
|
