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Pollen morphology of Pieris D. Don (Lyonieae, Ericaceae) and its taxonomic significance

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Title: Pollen morphology of Pieris D. Don (Lyonieae, Ericaceae) and its taxonomic significance
Authors: SARWAR, A. K. M. Golam Browse this author
TAKAHASHI, Hideki Browse this author
Keywords: Pieris
pollen morphology
taxonomic significance
Issue Date: Aug-2006
Publisher: 津村研究所
Journal Title: 植物研究雑誌
Journal Title(alt): The Journal of Japanese Botany
Volume: 81
Issue: 4
Start Page: 225
End Page: 234
Abstract: Pollen morphology of 6 species in the genus Pieris was examined using light and scanning electron microscopes. Judd’s infrageneric classification of Pieris was reexamined in the light of new palynological characters. The genus Pieris is stenopalynous in having 3-colporate and oblate pollen tetrads. However, a continuous and serial variation in the exine sculpture, tetrad diameter, polar and equatorial length of pollen and apocolpial exine thickness was revealed within the genus. Pieris nana is characterized by having the smallest pollen and the smallest rugulae in the rugulate sculpture. Considering other distinct morphological characters, we confirm the recognition of monotypic subgenus Arcterica based on this species. Within the other subgenus, Pieris, members of the sections Pieris and Phillyreoides can be distinguished by subtle differences in colpus width, septum thickness and ratio of colpus length to tetrad diameter. Pieris formosa is distinguished by its psilate exine with clear secondary striate sculpture. Pieris japonica and P. cubensis are not well differentiated in the palynological characters, and act as a bridge between sect. Pieris and sect. Phillyreoides. On the basis of palynological characters a dichotomous key of these taxa was also prepared.
Type: article (author version)
Appears in Collections:総合博物館 (The Hokkaido University Museum) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: Sarwar, A.K.M. Golam

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