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Development of structure-less pollen wall inCeratophyllum demersum L. (Ceratophyllaceae)

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Abstract

Developmental process of structure-less exine is studied in a hydrophilous plant,Ceratophyllum demersum L., with electron microscopy. The plant shows a characteristic feature in tetrad formation. A callose wall is not synthesized and exine initiation does not occur during the tetrad stage. After release of microspores, a trilaminar layer with two electron-dense lines is formed in the surface of each microspore. The trilaminar layer develops to a thin structure-less exine that is considered to consist of only an endexine. The unusual exine would be an adaptive feature for submersed pollination in fresh water.

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  1. Department of Biology, Faculty of Education, Kagawa University, 760, Takamatsu, Japan

    Masamichi Takahashi

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  1. Masamichi Takahashi
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Takahashi, M. Development of structure-less pollen wall inCeratophyllum demersum L. (Ceratophyllaceae). J. Plant Res. 108, 205–208 (1995). https://doi.org/10.1007/BF02344345

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  • DOI: https://doi.org/10.1007/BF02344345

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