Journal of Plant Research

, Volume 128, Issue 2, pp 239–247 | Cite as

Arundina graminifolia var. revoluta (Arethuseae, Orchidaceae) has fern-type rheophyte characteristics in the leaves

  • Eri Yorifuji
  • Naoko Ishikawa
  • Hiroshi Okada
  • Hirokazu Tsukaya
Regular Paper
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Abstract

Morphological and molecular variation between Arundina graminifolia var. graminifolia and the dwarf variety, A. graminifolia var. revoluta, was examined to assess the validity of their taxonomic characteristics and genetic background for identification. Morphological analysis in combination with field observations indicated that A. graminifolia var. revoluta is a rheophyte form of A. graminifolia characterized by narrow leaves, whereas the other morphological characteristics described for A. graminifolia var. revoluta, such as smaller flowers and short stems, were not always accompanied by the narrower leaf phenotype. Molecular analysis based on matK sequences indicated that only partial differentiation has occurred between A. graminifolia var. graminifolia and A. graminifolia var. revoluta. Therefore, we should consider the rheophyte form an ecotype rather than a variety. Anatomical observations of the leaves revealed that the rheophyte form of A. graminifolia possessed characteristics of the rheophytes of both ferns and angiosperms, such as narrower palisade tissue cells and thinner spongy tissue cells, as well as fewer cells in the leaf-width direction and fewer mesophyll cell layers.

Keywords

Anatomy Arundina graminifolia Arundina graminifolia var. revoluta Leaf structure matK Rheophyte Taxonomy 

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Copyright information

© The Botanical Society of Japan and Springer Japan 2014

Authors and Affiliations

  • Eri Yorifuji
    • 1
  • Naoko Ishikawa
    • 2
  • Hiroshi Okada
    • 3
    • 4
  • Hirokazu Tsukaya
    • 1
  1. 1.Department of Biological Sciences, Graduate School of ScienceThe University of TokyoTokyoJapan
  2. 2.Department of General Systems Studies, Graduate School of Arts and SciencesThe University of TokyoTokyoJapan
  3. 3.Institute of Natural Environmental SciencesHyogo Prefectural UniversitySandaJapan
  4. 4.Graduate School of ScienceOsaka City UniversityOsakaJapan

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