지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
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The morphological features of pollen grains collected from the broad-leaved and cylindrical-leaved Portulaca species of the Hawaiian Islands were investigated. The variation in size and surface pattern were examined using scanning electron microscopy and statistical analysis. Pollens of the Portulaca were apolar grains of monads exhibiting apertures, colpi, and relatively thin echini. Of particular interest was the differing size of pollen grains among the species studied. Pollens of the broad-leaved Portulaca were considerable in size with a length of about 73~86 μm, while the cylindrical-leaved Portulaca tended to have smaller pollen grains ranging from 50~65 in diameter. The smallest pollens were found in cultivar 2 having an average of 43 μm. The pollen was intectate,and the exine surface appeared granulous, having sculptured elements of spinules and puncta. Two types of puncta were discerned; one forming an operculum, and the other,a simple perforation. Numerous spinules and small puncta were found throughout the cylindrical-leaved Portulaca. In the present study, morphological features of pollen grains from ten Hawaiian Portulaca species, including endemic and unknown taxa, revealed the aforementioned pattern of variation. This paper aim to provide morphological information that could be of phylogenetic value within the Hawaiian Portulaca.
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참고문헌 (21)
참고문헌 신청
Baldwin B G / 2010 / Hawaiian angiosperm radiations of North American origin / Ann. Bot 105 : 849 ~ 879
Benett T M / 1985 / Palynology of selected horizons from the Ewa coastal plain, Oahu, Hawaii. Master’s thesis / 석사 / University of Hawaii at Manoa, Honolulu
Bir S S / 1980 / Cyto-palynological studies on weed flora of cultivable lands of Patiala District (Punjab) / J. Palynol 16 : 85 ~ 105
Byrne R / 1975 / Pre-Columbian purslane (P. oleracea L.) in the New World / Nature 25 : 726 ~ 727
Carolin R / 1987 / A review of the family Portulacaceae / Aust. J. Bot 35 : 383 ~ 412
Benett T M / 1985 / Palynology of selected horizons from the Ewa coastal plain, Oahu, Hawaii. Master’s thesis / 석사 / University of Hawaii at Manoa, Honolulu
Bir S S / 1980 / Cyto-palynological studies on weed flora of cultivable lands of Patiala District (Punjab) / J. Palynol 16 : 85 ~ 105
Byrne R / 1975 / Pre-Columbian purslane (P. oleracea L.) in the New World / Nature 25 : 726 ~ 727
Carolin R / 1987 / A review of the family Portulacaceae / Aust. J. Bot 35 : 383 ~ 412
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