Pollination Systems Inferred from Pollen-Ovule Ratios of Some Species of Podostemaceae

Access this Article

Search this Article

Author(s)

    • KATO MASAHIRO
    • Department of Biological Sciences,Graduate School of Science,University of Tokyo

Abstract

Members of the Podostemaceae grow submerged in rapidly flowing water in the rainy season, but are exposed and flower and eventually die in the dry season. Pollen-ovule ratios (P/O) of 20 species in 15 genera in the family were calculated and pollination in some species was observed. We observed that autogamous species have low values of log P/O, while allogamous species have high values. We therefore conclude that species with values of log P/O higher than 2.5 are allogamous, while those with a ratio lower than 2.0 are autogamous. The species of the subfamilies Weddellinoideae and Tristichoideae are inferred to be autogamous. The subfamily Podostemoideae consists of species with various pollination types ranging from allogamy to autogamy and cleistogamy. The ancestor of the family that invaded the specialized aquatic habitat may have been autogamous.

Journal

  • Acta phytotaxonomica et geobotanica

    Acta phytotaxonomica et geobotanica 53(1), 51-61, 2002

    The Japanese Society for Plant Systematics

References:  29

Codes

  • NII Article ID (NAID)
    110003733663
  • NII NACSIS-CAT ID (NCID)
    AA11586265
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    1346-7565
  • Data Source
    CJP  NII-ELS  J-STAGE 
Page Top