DIVERSITY IN THE STRUCTURE OF THE PETAL EPIDERMIS EMITTING ODOROUS COMPOUNDS IN Viola × wittrockiana Gams.
Elżbieta Weryszko-Chmielewska
University of Life Sciences in LublinAneta Sulborska
University of Life Sciences in LublinAbstract
The flowers of Viola × wittrockiana Gams. emit odorous compounds. The glands found in the flowers, responsible for the production of essential oils, are most frequently distributed on the petals of the corolla. They include papillae – conical epidermal cells. The structure of the epidermis and the internal tissues of the petals of V. × wittrockiana were examined using light, fluorescence and scanning electron microscopy. Papillae were found to occur in the epidermis on both sides of all the petals (spurred, lateral and upper), but they were much longer in the adaxial epidermis. Different-sized droplets of lipid nature, which are essential oils, were present in the papillae. They were also observed on the outer surface of the walls of these cells. Moreover, in the adaxial epidermis there were areas of flattened cells with a characteristic structure, being probably secretory glands. The present study shows that differently-structured cells of both the abaxial and
adaxial epidermis participate in the release of odorous compounds by the flowers of V. × wittrockiana. These different structures may produce varied scents in terms of their quality.
Keywords:
Viola × wittrockiana, petals, epidermis, papillae, osmophoresReferences
Ascensão L., Francisco A., Cotrim H., Pais M.S., 2005. Comparative structure of the labellum in Ophrys fusca and O. lutea [Orchidaceae]. Amer. J. Bot., 92, 1059–1067.
Barash C.W., 1998. The flavors of flowers. Herb Companion. 10, 32–37.
Beattie A.J., 1969. The floral biology of three species of Viola. New Phytol., 68, 1187–1201.
Broda M., 1971. Metody histochemii roślinnej. PZWL, Warszawa.
Ciccarelli D., Garbari F., Pagni A.M., 2008. The flower of Myrtus communis (Myrtaceae): Secretory structures, unicellular papillae, and their ecological role. Flora 203, 85–93.
Dinç M., Bađci Y., Öztürk M., 2007. Anatomical and ecological study on Turkish endemic Viola kizildaghensis M. Dinç and Ş. Yıldırımlı. Am-Euras. J. Sci. Res., 2 (1), 5–12.
Erhardt E., Erich G., Bödeker N., Seybold S., 2002. Zander. Handwatenbuch der Pflanzennahmen. Egen Ulmer GMbH & Co., Stuttgart.
Gil-Ad N.L., 1998. The micromorphologies of seed coats and petal trichomes of the taxa of Viola subsect. Boreali-Americanae (Violaceae) and their utility in discerning orthospecies from hybrids. Brittonia 50 (1), 91–121.
Herrera C.M., 2010. Marcescent corollas as functional structures: Effects on the fecundity of two insect-pollinated plants. Ann. Bot., 106 (4), 659–662.
Juniper B.E., Jeffree C.E., 1983. Plant Surfaces. Edward Arnold, London.
Kelley K.M., Cameron A.C., Biernbaum J.A., Poff K.L., 2003. Effect of storage temperature on the quality of edible flowers. Postharvest Biol. Technol. 27, 341–344.
Kugler H., 1970. Blütenökologie. Gustav Fisher Verlag, Jena.
Kuta E., Bohdanowicz J., Słomka A., Pilarska M., Bothe H., 2012. Floral structure and pollen morphology of two zinc violets (Viola lutea ssp. calaminaria and V. lutea ssp. westfalica) indicate their taxonomic affinity to Viola lutea. Plant Syst. Evol., 298, 445–455.
Maurizio A., Grafl I., 1969. Das Trachtpflanzenbuch. Nektar und Pollen die wichtigsten nah rungsquellen der honigbiene. Ehernwirth Verlag, München.
Oszkinis K., 1994. Kwiaty od A do Z. PWRiL, Warszawa.
Proctor M., Yeo P., Lack A., 1996. The Natural History of Pollination. Harper Collins Publisher, London.
Rutkowski L., 2003. Klucz do Oznaczania Roślin Naczyniowych Polski Niżowej. Wyd. Nauk. PWN, Warszawa.
Startek L., 2003. Cultivation facilities and decorative value of garden Pansy. Rośliny Ozdobne. 2, 16–18.
Stern W.L., Curry K.J., Pridgeon A.M., 1987. Osmophores of Stanhopea (Orchidaceae). Am. J. Bot., 74, 1323–1331.
Stpiczyńska M., 1993. Anatomy and ultrastructure of osmophores of Cymbidium tracyanum Rolfe (Orchidaceae). Acta Soc. Bot. Pol., 62 (1/2), 5–9.
Stpiczyńska M., 2001. Osmophores of the fragrant orchid Gymnadenia conopsea L. (Orchidaceae). Acta Soc. Bot. Pol., 70 (2), 91–96.
Szweykowska A., Szweykowski J., 2003. Słownik botaniczny. Wiedza Powszechna, Warszawa.
Vogel S., 1990. The role of scent glands in pollination. Smithsonian Institution Libraries and The National Science Foundation, Washington.
Weberling F., 1992. Morphology of flowers and inflorescences. Cambridge Univ. Press.
Weryszko-Chmielewska E., 2003. Mikromorfologia kwiatów ruty zwyczajnej (Ruta graveolens L.). Annales UMCS, sec. EEE, Horticultura, XIII, 45–51.
Weryszko-Chmielewska E., Chwil M., 2010. Ecological adaptations of the floral structures of Galanthus nivalis L. Acta Agrobot., 63 (2), 41–49.
Weryszko-Chmielewska E., Sawidis T., Piotrowska K., 2006. Anatomy and ultrastructure of floral nectaries of Asphodelus aestivus Brot. (Asphodelaceae). Acta Agrobot., 59 (2), 29–42.
Whitney H.M., Chittka L., Bruce T.J.A., Glover B.J., 2009. Conical epidermal cells allow bees to grip flowers and increase foraging efficiency. Curr. Biol., 19, 948–953.
Whitney H.M., Bennett K.M.V., Dorling M., Sandbach L., Prince D., Chittka L., Glover B.J. 2011 a. Why do so many petals have conical epidermal cells? Ann. Bot., 108, 609–616.
Whitney H.M., Poetes R., Steiner U., Chittka L., Glover B.J., 2011 b. Determining the contribution of epidermal cell shape to petal wettability using isogenic Antirrhinum lines. PLoS ONE 6 (3), e17576, doi: 10.1371/journal.pone.0017576.
Zawadzińska A., Janicka D., 2007 a. Effects of compost media on growth and flowering of parviflorus garden Pansy (Viola × wittrockiana Gams.). Part I. Plant growth and conformation. Acta Agrobot., 60 (2), 161–166.
Zawadzińska A, Janicka D., 2007 b. Effects of compost media on growth and flowering of parviflorus garden Pansy (Viola × wittrockiana Gams.). Part II. Plant flowering and decorative value. Acta Agrobot., 60 (2), 167–171.
University of Life Sciences in Lublin
University of Life Sciences in Lublin
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