CAJ | 학술논문

在扫描电镜下观察了分布于南半球的柏科Cupressaceae单种属Pilgerodendron uviferum 及其相关类群的代表种Austrocedrus chilensis、Libocedrus plumosa和Papuacedrus papuana叶角质层内外表面的微形态特征.发现Pilgerodendron uviferum 叶角质层外表面光滑,不具Florin环,而其余3个属的代表种均有明显的Florin环;且仅L. plumosa叶角质层外表面有乳状突起.观察结果支持传统的观点,即将P. uviferum作为独立的属;不支持基于DNA分析的结果,即将P. uviferum归并到Libocedrus属.发现Papuacedrus papuana叶角质层外表面有许多明显的小凹陷,与其相对应的叶角质层内表面有凹陷的小狭缝,该性状以前未见报道.
재소묘전경하관찰료분포우남반구적백과Cupressaceae단충속Pilgerodendron uviferum 급기상관류군적대표충Austrocedrus chilensis、Libocedrus plumosa화Papuacedrus papuana협각질층내외표면적미형태특정.발현Pilgerodendron uviferum 협각질층외표면광활,불구Florin배,이기여3개속적대표충균유명현적Florin배;차부L. plumosa협각질층외표면유유상돌기.관찰결과지지전통적관점,즉장P. uviferum작위독립적속;불지지기우DNA분석적결과,즉장P. uviferum귀병도Libocedrus속.발현Papuacedrus papuana협각질층외표면유허다명현적소요함,여기상대응적협각질층내표면유요함적소협봉,해성상이전미견보도.
The taxonomic position of the monotypic conifer Pilgerodendron uviferum,an endemic species in southern South America,has been disputed on the basis of phylogenetic analysis using molecular data.These results suggest that P.uviferum is a species of Libocedrus.Phylogenetic analysis using morphological data appears to uphold its separate status.Characters of leaf cuticles are investigated and compared between four related genera including Pilgerodendron and further distinctions between these are reported.The merits of these conflicting data sets for the taxonomy of the genus Libocedrus s.l.Are discussed.It is concluded that the evidence for a merger of Pilgerodendron with Libocedrus is weak and that both morphology and biogeography support the separation of the two genera.