Speciation and Morphological Evolution in Rheophytes

  • Ryoko Imaichi
  • Masahiro Kato


It is widely accepted that species are defined to be reproductively isolated groups within which natural populations interbreed [1,2]. According to this biological species concept, if reproductive isolation is established among populations, valid species could be produced. The implication is that speciation need not be accompanied by any detectable morphological changes [3]. In plants with limited movement, however, speciation is sometimes associated with distinct morphological changes, which enable plants to invade new ecological niches. The mode of speciation may hold in the case for the evolution of rheophytes.


Mesophyll Cell Narrow Leaf Biological Species Concept Young Sporophyte Paradermal Section 
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Copyright information

© Springer-Verlag Tokyo 1997

Authors and Affiliations

  • Ryoko Imaichi
    • 1
  • Masahiro Kato
    • 2
  1. 1.Department of Chemical and Biological Sciences, Faculty of ScienceJapan Women’s UniversityBunkyo-ku, Tokyo 112Japan
  2. 2.Department of Biological Sciences, Graduate School of ScienceUniversity of TokyoBunkyo-ku, Tokyo 113Japan

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