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Study of petal topography of Lysimachia arvensis grown under natural conditions

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The present study revealed that adaxial and abaxial petal epidermises of the blue-flowered Lysimachia arvensis consist of elongated, multi-micro-papillate cells, which may aid the rapid petal expansion. The epidermal cells are covered by a wrinkled relief, which is further ornamented by submicron features that increase in size the surface area of lobes; this may be a well-adapted mechanism of the small-sized flowers of L. arvensis with the short life span. The sculpturally increased surface area of adaxial epidermal cells of petals is expected to contribute to optical and adhesive properties, and wettability of the floral tissues. The adaxial and the abaxial petal surfaces of L. arvensis possess submicron cuticular folds, smaller than the sub-wavelength visible spectrum, which reflect radiation of shorter rather than longer wavelengths, whereas intense absorption was detected in the red spectral region. Also, three-celled capitate trichomes with a pigmented spherical head, which are densely distributed at the corolla margins of L. arvensis, may be involved in adhesive, defensive and functional properties of the floral tissues.
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Keywords: Lysimachia arvensis; epidermis; flower; petal; properties; surface; topography

Document Type: Research Article

Affiliations: 1: Department of Botany, Faculty of Biology National and Kapodistrian University of Athens Panepistimiopolis, Athens, 15784, Greece 2: University of Crete, Department of Materials Science and Technology, Rethymno, Crete, Greece

Publication date: October 2, 2015

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