Journal of Plant Research

, Volume 107, Issue 2, pp 161–164 | Cite as

Pollen development in a submerged plant,Ottelia alismoides (L.) Pers. (Hydrocharitaceae)

  • Masamichi Takahashi
Original Articles


Exine structure and its developmental program in a submerged plant,Ottella alismoides (L.) Per. were investigated with scanning and transmission electron microscopies. Verrucate protrusions initiate on microspore plasma membrane at early tetrad stage. The verrucate protrusions develop into spines during free microspore stage. A foot layer is formed by accumulation of lamellated structure. The pollen grains ofOttelia alismoides are inaperturate, not omniaperturate, because of the well-developed foot layer. The inaperturate pollen grains ofOttelia are characterized by the spinous protrusions and the granular foot layer.

Key words

Exine Hydrophilous Inaperturate Ottelia Pollen Spine 


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Copyright information

© The Botanical Society of Japan 1994

Authors and Affiliations

  • Masamichi Takahashi
    • 1
  1. 1.Department of Biology, Faculty of EducationKagawa UniversityTakamatsuJapan

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