A Cytological Analysis of 24 Taxa in Aristolochia Subgenera Siphisia and Aristolochia (Aristolochiaceae)

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Author(s)

    • SUGAWARA TAKASHI
    • Makino Herbarium,Graduate School of Science,Tokyo Metropolitan University
    • MURATA JIN
    • Botanical Gardens,Graduate School of Science,University of Tokyo
    • WU SUGONG
    • Kunming Institute of Botany,Chinese Academy of Sciences
    • OHI TETSUO
    • Botanical Gardens,Graduate School of Science,University of Tokyo

Abstract

Cytological investigations were carried out on 24 taxa representing Aristolochia subgenera Siphisia and Aristolochia. Of them, 17 taxa (16 species and one variety) were examined for the first time. In subgeneus Siphisia, all the eight species, A. austoyunnanensis, A. kwangsiensis, A. macrophylla, A. moupiensis, A. nakaoi, A. paracleta, A. salvadorensis and A. tricaudata show the same number of 2n=32. While in subgenus Aristolochia three different chromosome numbers were observed ; 2n=16 in A. maxima and A. ovalifolia ; 2n=14 in A. arcuata, A. argentiana, A. clematitis, A. cymbifera var. abbreviata, A. fimbriata, A. goliathiana, A. macroura, A. micrantha, A. odoratissima, A. ringens and A. tiangularis ; 2n=12 in A. jackii, A. kankauensis and A. tagala. The chromosome numbers obtained are relatively well in congruence with the classification system and with the molecular phylogeny. Based on the present and previous studies the subgenus Siphisia is characterized by the number 2n=32. In contrast, the subgenus Aristolochia is diversified in chromosome number, showing the three different numbers. Subsection Podanthemum and series Thyrsicae seem to be characterized by the numbers, 2n=12 and 2n=16, respectively.

Journal

  • Acta phytotaxonomica et geobotanica

    Acta phytotaxonomica et geobotanica 52(2), 149-158, 2001

    The Japanese Society for Plant Systematics

References:  21

Codes

  • NII Article ID (NAID)
    110003733657
  • NII NACSIS-CAT ID (NCID)
    AA11586265
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    1346-7565
  • Data Source
    CJP  NII-ELS  J-STAGE 
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