Staminodial nectary structure in two Pulsatilla (L.) species

• Autorzy: Weryszko-Chmielewska E. , Sulborska A.
• Języki publikacji: EN

Abstrakty

EN

In plants belonging to the Ranunculaceae the floral nectaries may differ in origin, location in the flower, shape and structure. In many cases they are defined as modified tepals or modified stamens. The nectary organs in this family are frequently termed "honey leaves," and staminodial origin is attributed to them. Gynopleural and receptacular nectaries are rarely found in Ranunculaceae. To date there are no reports on the structure of the nectary organs in plants of the genus Pulsatilla. We used light and scanning electron microscopy to study the location and structure of the nectaries in Pulsatilla slavica and P. vulgaris flowers. The staminodial nectaries were found to be nectar-secreting organs. The number of stamens per flower (102-398) increases with plant age. The share of staminodes is 12–15%. The staminodes are composed of a filament and a modified head. They are green due to the presence of chloroplasts in the epidermal and parenchymal cells. The parenchymal cells are in a loose arrangement. Stomata (3–20), through which nectar exudation occurred, were found only in the abaxial epidermis of the staminode head. The stomata are evenly distributed and have well-developed outer cuticular ledges. Some of them are immature during nectar secretion, with their pores covered by a layer of cuticle. During the activity of the nectariferous organs in the flowers, primary (on the staminode surface) and secondary nectar (at the base of tepals) are presented. The staminodes of the two Pulsatilla species show similar structural features and have similar shares in the androecium.

Słowa kluczowe

EN

Ranunculaceae; Pulsatilla; Pulsatilla slavica; Pulsatilla vulgaris; staminode; nectar; nectar secretion; micromorphology; stereoscopic microscopy; light microscopy; scanning electron microscopy

• Wydawca: -
• Czasopismo: Acta Biologica Cracoviensia. Series Botanica
• Rocznik: 2011
• Tom: 53
• Numer: 2
• Opis fizyczny: p.94-103,fig.,ref.

Twórcy

autor

Weryszko-Chmielewska E.

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

autor

Sulborska A.

Bibliografia

• BARTH FG. 1991. Insects and Flowers. The Biology of a Partnership. Princeton University Press, Oxford.
• BERNARDELLO G. 2007. A systematic survey of floral nectaries. In: Nicolson SW, Nepi M, Pacini E [eds], Nectaries and Nectar. Springer, Dordrecht.
• CHWIL M, and WERYSZKO-CHMIELEWSKA E. 2007. Nectary structure and nectar secretion of Echium russicum J. F. Gmel. flowers. Acta Agrobotanica 60 (1): 25–33.
• DAHLGREN G. 1992. Ranunculus subgenus Batrachium on the Aegean Islands and adjacent areas nectary types and breading system. Nordic Journal of Botany 12: 299– 310.
• DAVIS AR. 1997. Influence of floral visitation on nectar-sugar composition and nectary surface changes in Eucalyptus. Apidologie 28: 27– 42.
• ERBAR C, KUSMA S, and LEINS P. 1998. Development and interpretation of nectary organs in Ranunculaceae. Flora 194: 317–332.
• ESAU K. 1973. Anatomia Roślin. Państwowe Wyd. Rolnicze i Leśne, Warszawa.
• FAHN A, and SHIMONY C. 2001. Nectary structure and ultrastructure of unisexual flowers of Ecballium elaterium (L.) A. Rich. (Cucurbitaceae) and their presumptive pollinators. Annals of Botany 87: 27–33.
• GAFFAL K, HEIMLER W, and EL-GAMMAL S. 1998. The floral nectary of Digitalis purpurea L., structure and nectar secretion. Annals of Botany 81: 251– 262.
• HUANG SQ, TAKAHASHI Y, and DAFNI A. 2002. Why does the flower stalk of Pulsatilla cernua (Ranunculaceae) bend uring anthesis? American Journal of Botany 89 (10): 1599–1603.
• KOŁTOWSKI Z. 2006. Wielki Atlas Roślin Miododajnych. Przedsiębiorstwo Wydawnicze Rzeczpospolita S.A., Warszawa.
• KRATOCHWIL A. 1988a. Funktionsmorphologische Veränderungen im Blütenbau innerhalb der Gattung Pulsatilla (Ranunculaceae). Verhandlungen der Deutschen Zoologischen Gesellschaft 81: 187.
• KRATOCHWIL A. 1988b. Zur Bestäubungsstrategie von Pulsatilla vulgaris Mill. Flora 181: 261–325.
• KUGLER H. 1970. Blütenökologie. Gustav Fischer Verlag, Stuttgart.
• LIPIŃSKI M. 2010. Pożytki Pszczele. Zapylanie i Miododajność Roślin. Powszechne Wydawnictwo Rolnicze i Leśne sp. z o. o., Warszawa.
• PETANIDOU T. 2007. Ecological and evolutionary aspects of floral nectars in Mediterranean habitats. In: Nicolson SW, Nepi M, Pacini E [eds], Nectaries and Nectar. Springer, Dordrecht.
• PIĘKOŚ-MIRKOWA H, and MIREK Z. 2003. Flora Polski. Atlas Roślin Chronionych. Multico Oficyna. Warszawa.
• PROCTOR M, YEO P, and LACK A. 1996. The Natural History of Pollination. The Bath Press, Hampshire.
• RUTKOWSKI L. 1998. Klucz do Oznaczania Roślin Naczyniowych Polski Niżowej. Wydawnictwo Naukowe PWN, Warszawa.
• SMETS EF. 1986. Localization and systematic importance of the floral nectaries in the Magnoliatae (Dicotyledons). Bulletin du Jardin Botanique National de Belgique 56: 51–76.
• SMETS EF, and CRESENS EM. 1988. Types of floral nectarines and the concepts "character" and "character state" – a reconsideration. Acta Botanica Neerlandica 37: 121–128.
• SULBORSKA A, and WERYSZKO-CHMIELEWSKA E. 2007. Anatomy and ultrastructure of floral nectary of Inula helenium L. (Asteraceae). Acta Societatis Botanicorum Poloniae 6 (3): 201–207.
• SZAFER W, KULCZYŃSKI S, and PAWŁOWSKI B. 1986. Rośliny Polskie. Państwowe Wydawnictwo Naukowe, Warszawa.
• SZAFER W, and WOJTUSIAKOWA H. 1969. Kwiaty i Zwierzęta. Zarys Ekologii Kwiatów. Państwowe Wydawnictwo Naukowe, Warszawa.
• VESPRINI JL, NEPI M, and PACINI E. 1999. Nectary structure, nectar secretion patterns and nectar composition in two Helleborus species. Plant Biology 1: 560–568.
• VOGEL S. 1993. Pollination systems. In: Kubitzki K, Rohwer JG, Brittrich V [eds.], The Families and Genera of Vascular Plants, Flowering plants, Dicotyledons: Magnoliiol, Hamamelid and Caryophyllid families, vol. 2. Springer, Berlin.
• WERYSZKO-CHMIELEWSKA E. 2003. Morphology and anatomy of floral nectary and corolla outgrowths of Myosotis sylvatica Hoffm. (Boraginaceae). Acta Biologica Cracoviensia Series Botanica 45 (1): 43–48.
• WERYSZKO-CHMIELEWSKA E, MASIEROWSKA M, and KONARSKA A. 2003. Characteristics of floral nectaries and nectar in two species of Crataegus (Rosaceae). Plant Systematics and Evolution 238: 33–41.
• WERYSZKO-CHMIELEWSKA E, and CHWIL M. 2007. Micromorphology of the epidermis of the floral nectary of Rhododendron japonicum (A. Gray) J. V. Suringar ex E. H. Wilson. Acta Agrobotanica 60 (1): 45–53.

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