Characteristics of flower nectaries of Hedera helix L. (Araliaceae)

• Autorzy: Konarska A.

Warianty tytułu

PL

Charakterystyka nektarników kwiatowych Hedera helix L. (Araliaceae)

• Języki publikacji: EN

Abstrakty

EN

The structure of floral nectaries of ivy (Hedera helix) was investigated under light, scanning, and transmission electron microscopes. The nectar of ivy is located on top of the inferior ovary forming a distinct undulating disc between the base of petals and the style. The ivy nectary represents open and persistent nectaries. During consecutive days of anthesis, nectaries change their colour from green to brown. The secretory epidermis is covered with a thick, deeply striated cuticle, and nectar is released by nectarostomata. Epidermal cells exhibited plastids with plastoglobules and a few starch grains as well as vacuoles containing anthocyanins, the content of which increased during the successive days of anthesis and nectar secretion. Multi-layered glandular parenchyma and, underneath, subglandular tissue are located under the epidermis. The nectary was supplied by vascular bundles with phloem and xylem. Numerous chloroplasts were visible in the cytoplasm of the external layers of glandular parenchyma; they were either typical with small starch grains or untypical with circular arrangement of thylakoids. Amyloplasts containing storage starch grains and numerous small vacuoles were present in the cells of deeper layers of the nectar-bearing tissue. Druses, flocculent residue, myelin figures and spherical deposits of unknown origin were visible in the gland parenchyma vacuoles.

PL

Strukturę nektarników kwiatowych H. helix badano w mikroskopie świetlnym oraz elektronowym skaningowym i transmisyjnym. Gruczoł nektarnikowy bluszczu znajduje się na szczycie zalążni dolnego słupka i tworzy pokaźny, pofałdowany dysk miedzy nasadą płatków korony a szyjką słupka. Nektarniki bluszczu należą do typu otwartych i trwałych, a w kolejnych dniach antezy charakteryzują się zmianą barwy z zielonej na brunatną. Epiderma sekrecyjna pokryta jest głęboko prążkowaną grubą kutykulą, a sekrecja nektaru odbywa się przez zmodyfikowane aparaty szparkowe. Pod epidermą znajduje się kilkunastowarstwowa parenchyma gruczołowa, a poniżej tkanka pod gruczołowa. Nektarnik zaopatrzony jest w wiązki przewodzące zawierające łyko i drewno. W komórkach epidermy zaobserwowano plastydy z plastoglobulami i nielicznymi ziarnami skrobi oraz wakuole zawierające antocyjany, których zawartość wzrastała w kolejnych dniach antezy i sekrecji nektaru. W cytoplazmie zewnętrznych warstw parenchymy gruczołowej występować liczne chloroplasty; typowe, mogące zawierać niewielkie ziarna skrobi oraz nietypowe, odznaczające się kolistym przebiegiem tylakoidów. W komórkach głębszych pokładów tkanki nektaronośnej obecne były amyloplasty z ziarnami skrobi zapasowej oraz drobne, liczne wakuole. W wakuolach parenchymy gruczołowej widoczne były druzy oraz kłaczkowaty osad, figury mielinowe i sferyczne depozyty niewiadomego pochodzenia.

Słowa kluczowe

EN

flower; nectary; Hedera helix; Araliaceae; micromorphology; plant anatomy; ultrastructure

• Wydawca: -
• Czasopismo: Acta Scientiarum Polonorum. Hortorum Cultus
• Rocznik: 2014
• Tom: 13
• Numer: 3
• Opis fizyczny: p.109-122,fig.,ref.

Twórcy

autor

Konarska A.

• Department of Botany, University of Life Sciences in Lublin, Akademicka 15, 20-950 Lublin, Poland

Bibliografia

• Almeida O.J., Cota-Sánchez J.H., Paoli A.A., 2013. The systematic significance of floral morphology, nectaries, and nectar concentration in epiphytic cacti of tribes Hylocereeae and Rhipsalideae (Cactaceae). Perspect. Plant Ecol. 15(5), 255–268.
• Baker H.G., Baker I., 1983. Floral nectar sugar constituents in relation to pollinator type. In: Handbook of experimental pollination biology, Jones C.E., Little, RJ. (eds.). Van Nostrand, New York, 117–141.
• Belmonte E., Cardemil L., Kalin Arroyo M.T., 1994. Floral nectary structure and nectar composition in Eccremocarpus scaber (Bignoniaceae), a humming bird-pollinated plant of central Chile. Am. J. Bot. 8, 493–503.
• Bottema S., 2001. A note of the pollen representation of ivy (Hedera helix L.). Rev. Paleobot. Palynol. 117, 159–166.
• Cawoy V., Jean-Marie Kinet J.M., Jacquemart A.L., 2008. Morphology of nectaries and biology of nectar production in the distylous species Fagopyrum esculentum. Ann Bot. 102(5), 675–684.
• Davis A.R., Gunning B.E.S., 1992. The modified stomata of the floral nectary of Vicia faba L. 1. Development, anatomy and ultrastructure. Protoplasma, 166, 134–152.
• Dmitruk M., Weryszko-Chmielewska E., 2013. The morphology and ultrastructure of the nectaries of marrow (Cucurbita pepo L. convar. giromontiina). Acta Agrobot. 66(3), 11–22.
• Durkee L.T., 1982. The floral and extrafloral nectaries of Passiflora. II. The extrafloral nectary. Am. J. Bot. 69, 1420–1428.
• Erbar C., Leins P., 1988. Floral developmental studies in Aralia and Hedera (Araliaceae). Flora 180, 391–406.
• Erbar C., Leins P., 2010. Nectaries in Apiales and related groups. Plant Div. Evol. 128, 269–295.
• Fahn A., Simony C., 2001. Nectary structure and ultrastructure of unisexual flowers of Ecballium elaterium (L.) A. Rich. (Cucurbitaceae) and their presumptive pollinators. Ann. Bot. 87, 27–33.
• Gaffal K.P., Friedrichs G.J., El-Gammal S., 2007. Ultrastructural evidence for a dual function of the phloem and programmed cell death in the floral nectar of Digitalis purpurea. Ann. Bot. 99, 593–607.
• Giuliani C., Bini L.M., Lippi, M.M., 2012. Two structures and functions in the nectary of Frankincense tree (Boswellia sacra Flueck.). Flora 207(1), 74–79.
• Gui M.Y., Liu W.Z., 2013. Programmed cell death during floral nectary senescence in Ipomoea purpurea. Protoplasma, 1–9.
• Hobbhahn N., Johnson S.D., Bytebier B., Yeung E.C., Harder L.D., 2013. The evolution of floral nectaries in Disa (Orchidaceae: Disinae): recapitulation or diversifying innovation? Ann. Bot. 112(7), 1303–1319.
• Horner H.T., Healy R.A., Cervantes-Martinez T., Palmer R.G., 2003. Floral nectary fine structure and development in Glycine max L. (Fabaceae). Int. J. Plant Sci. 164, 675–690.
• Jacobs J.H., Clark J., Denholm I., Goulson D., Stoate C., Osborne J.L., 2010. Pollinator effectiveness and fruit set in common ivy, Hedera helix (Araliaceae). Arthropod-Plant Interact. 4, 19–28.
• Kołtowski Z., 2006. Wielki atlas roślin miododajnych. Wyd. Rzeczpospolita. Warszawa. Kołtowski Z., 2008. Bluszcz pospolity. Pasieka 1(27), 20–21.
• Konarska A., 2011. Flower nectary structure in Cornus alba L. Plant Syst. Evol. 291, 1–6.
• Lippi M.M., Giuliani C., Gonnelli T., Bini L.M., 2011. Floral color changes in Boswellia sacra Flueck. (Burseraceae): A dialogue between plant and pollinator. Flora 206(9), 821–826.
• Metcalfe D.J., 2005. Hedera helix L. J. Ecol. 93, 632–648.
• Mohr H., Schopfer P., 1995. Plant physiology. Springer, Berlin, 629. Nicolson S.W., Nepi M., Pacini E., 2007. Nectaries and nectar. Springer, Dordrecht.
• Nocentini D., Pacini E., Guarnieri M., Nepi M., 2012. Flower morphology, nectar traits and pollinators of Cerinthe major (Boraginaceae-Lithospermeae). Flora 207(3), 186–196.
• O’Brien S.P., Loveys B.R., Grant W.J.R., 1996. Ultrastructure and function of floral nectaries of Chamelaucium uncinatum (Myrtaceae). Ann. Bot. 78, 189–196.
• Pacini E., Nepi M., Vesprini J.L., 2003. Nectar biodiversity: a short review. Plant. Syst. Evol. 238, 7–21.
• Paiva E.A., 2012. Anatomy, ultrastructure, and secretory activity of the floral nectaries in Swietenia macrophylla (Meliaceae). Am. J. Bot. 99(12), 1910–1917.
• Razem F.A., Davis A.R., 1999. Anatomical and ultrastructural changes of the floral nectary of Pisum sativum L. during flower development. Protoplasma 206, 57–72.
• Reynolds E.S., 1963. The use of lead citrate at high pH as an electron-opaque stain for electron microscopy. J. Cell Biol. 17, 208–212.
• Smets E.F., 1986. Localization and systematic importance of the floral nectaries in the Magnoliatae (Dicotyledons). Bull. Jard. Bot. Nat. Belg. 56, 51–76.
• Spurr A.R., 1969. A low-viscosity epoxy resin embedding medium for electron microscopy. J. Ultra. Res. 26,31–43.
• Stpiczyńska M., Davies K.L., Gregg A., 2003. Nectary structure and nectar secretion in Maxillaria coccinea (Jacq.) L.O. Williams ex Hodge (Orchidaceae). Ann. Bot. 93, 87–95.
• Vesprini J.L., Nepi M., Pacini E., 1999. Nectary structure, nectar secretion patterns and nectar composition in two Helleborus species. Plant Biol. 1, 560–568.
• Vesprini J.L., Pacini E., Nepi M., 2012. Floral nectar production in Helleborus foetidus: an ultrastructural study. Botany 90(12), 1308–1315.
• Vezza M., Nepi M., Guarnieri M., Artese D., Rascio N., Pacini E., 2006. Ivy (Hedera helix L.) flower nectar and nectar ecophysiology. Int. J. Plant. Sci. 167(3), 519–527.
• Weryszko-Chmielewska E., Dmitruk M., 2009. Characteristics of blooming, floral nectaries and nectar of Malus sargentii Rehd. Acta Agrobot. 62(1), 17–25.
• Weryszko-Chmielewska E., Sulborska A., 2011. Morphological characters of the flowers and the structure of the nectaries of Acer platanoides L. Acta Agrobot. 64(3), 19–28.
• Wist T.J., Davis A.R., 2006. Floral nectar production and nectar anatomy and ultrastructure of Echinacea purpurea (Asteraceae). Ann. Bot. 97, 177–193. Witkowska-ĩuk L., 2008. Atlas roślinności lasów. Wyd. Multico, Warszawa.
• Zer H., Fahn A., 1992. Floral nectaries of Rosmarinus officinalis L.: structure, ultrastructure and nectar secretion. Ann. Bot. 70, 391–397.