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An overview of pollen morphology and its systematic significance in the subfamily Arbutoideae of the Ericaceae

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Title: An overview of pollen morphology and its systematic significance in the subfamily Arbutoideae of the Ericaceae
Other Titles: ツツジ科アルブトゥス亜科の花粉形態の大要とその体系学的意義
Authors: Sarwar, A.K.M. Golam1 Browse this author
Ito, T.2 Browse this author
Takahashi, H.3 Browse this author
Authors(alt): サルワル, A.K.M. ゴラム1
伊藤, 利章2
高橋, 英樹3
Keywords: stenopalynous
permanent tetrads
exine sculpture
light microscopy
scanning electron microscopy
transmissionelectron microscopy
Issue Date: Dec-2008
Publisher: 日本花粉学会
Journal Title: 日本花粉学会会誌
Journal Title(alt): Japanese Journal of Palynology
Volume: 54
Issue: 2
Start Page: 79
End Page: 92
Abstract: Subfamily Arbutoideae (Ericaceae) comprises four genera (Arbutus, Arctostaphylos, Comarostaphylos and Ornithostaphylos) and 81 species. We have examined the pollen morphology of 17 species from three of these genera: Arbutus, Arctostaphylos, Comarostaphylos representing using light microscopy (LM) and scanning electron microscopy (SEM) and also, for selected species, transmission electron microscopy (TEM). The Arbutoideae are generally stenopalynous; the four 3-colpor(-oid)ate grains are united in compact rounded permanent tetrads. No pollen morphological characters or character combinations distinguish Arbutoideae within the Ericaceae. However, within the subfamily, Arctostaphylos and Comarostaphylos commonly have smaller pollen tetrads with a thin perforated septum, while Arbutus pollen tetrads are usually larger and characterized by thicker septum without distinct perforations. The rugulate apocolpial exine sculpture of Arctostaphylos is usually less distinct than the coarser rugulate ectexine often observed for the pollen of Arbutus and Comarostaphylos.
広義のツツジ科全体の花粉形態を観察し,その体系学的意義をあきらかにする目的で,これまで科に含まれる8亜科のうちドウダンツツジ亜科,シャクジョウソウ亜科,スノキ亜科の3亜科について報告してきた,.本研究ではアルブトゥス亜科の花粉形態について報告した,.本亜科を構成する4属81種のうち3属17種の花粉サンプルを得て,その花粉形態を光学顕微鏡,走査型電子顕微鏡,透過型電子顕微鏡で観察し,先行研究の結果と併せて花粉形態の体系学的意義について検討した,.本亜科の花粉形態は均一で,3溝孔(類孔)の花粉粒4個が合着した緊密で球状の花粉四集粒を形成する,.ツツジ科の中でアルブトゥス亜科のみを特徴づけるような花粉形態形質やその組み合わせはなかった,.ウラシマツツジ属とコマロスタフィロス属の花粉サイズは小さく四集粒内隔壁は薄く穿孔があるのが普通であるが,アルブトゥス属の花粉サイズは通常大きく,四集粒内隔壁はより厚く明確な穿孔がなかった,.溝粒極域の花粉表面模様において,ウラシマツツジ属では通常は中程度の細かさのしわ模様だが,コマロスタフィロス属とアルブトゥス属ではしばしばより粗いしわ模様となる点でやや異なっていた,.
Type: article (author version)
URI: http://hdl.handle.net/2115/38535
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

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