scholarly journals Structure of floral nectaries, nectar production and sugar composition in nectar of 7 species of Vicia L. Fabaceae

2013 ◽  
Vol 52 (1-2) ◽  
pp. 49-57
Author(s):  
Małgorzata Stpiczyńska ◽  
Jacek Pielecki
Keyword(s):  
Sugar Composition ◽  
Nectar Production ◽  
Nectary Structure ◽  
Floral Nectaries

Nectaries of investigated species of <em>Vicia</em> were ranked into 3 morphological types: automorphic (<em>V. sepium</em> L.), transitoric (<em>V. angustifolia</em> L., <em>V. sativa</em> L., <em>V. villosa</em> Roth, <em>V. cracca</em> L.) and flat, epimorphic (<em>V. hirsuta</em> (L.) S. F. Gray and <em>V. tetrasperma</em> (L.) Schreb.). The best nectaring was connected with well defined nectary structure, and moreover quantity of nectar was correlated with nectary size but was not depended on number of secretory stomata. Sucrose dominated in the nectar of 6 species of vetches, the exception was balanced nectar of <em>V. tetrasperma</em>.

scholarly journals "Sweet but dangerous": nectaries in carnivorous plants

2012 ◽  
Vol 60 (2) ◽  
pp. 31-37 ◽  
Author(s):  
Bartosz J. Płachno
Keyword(s):  
Carnivorous Plants ◽  
Ecological Group ◽  
Nectary Structure ◽  
Floral Nectaries

In carnivorous plants, two types of nectaries occur: extra-floral nectaries, generally associated with prey luring, and floral ones associated with pollination. Nectar produced by extra-floral nectaries not only attracts prey but may also be involved in trapping prey and plays a role in myrmecophily. The diversity of nectary structure in carnivorous plants reflects complicated evolutionary routes in this unique ecological group.

Anatomy and vasculature of the floral nectaries of Brassica napus (Brassicaceae)

1986 ◽  
Vol 64 (11) ◽  
pp. 2508-2516 ◽  
Author(s):  
A. R. Davis ◽  
R. L. Peterson ◽  
R. W. Shuel
Keyword(s):  
Brassica Napus ◽  
Structural Features ◽  
Nectar Secretion ◽  
Brassica Napus L ◽  
Nectar Production ◽  
Ultrastructural Evidence ◽  
Floral Nectaries

The floral nectaries of Brassica napus L. (Argentine or Swede rape) consist of two pairs of glands which are supplied by phloem only. The lateral pair has an extensive phloem supply and produces most of the flowers' nectar, whereas the median pair is supplied by limited phloem and produces relatively little nectar. Because both lateral and median nectaries contain cells exhibiting similar structural features, the disparity in phloem supply between them could account for the observed difference in nectar production. Ultrastructural evidence suggests an energy-requiring, eccrine mechanism of nectar secretion in Brassica napus. Both apoplastic and symplastic routes for nectar movement and escape appear feasible. Stomata on the nectary surfaces may serve as exits.

scholarly journals Nectary structure and nectar in Sobralia and Elleanthus (Sobralieae: Orchidaceae)

Lankesteriana ◽  
2015 ◽  
Vol 15 (2) ◽  
Author(s):  
Kurt M. Neubig ◽  
Barbara S. Carlsward ◽  
W. Mark Whitten ◽  
Norris H. Williams
Keyword(s):  
Floral Morphology ◽  
Flower Size ◽  
Nectar Production ◽  
Nectar Foraging ◽  
Nectary Structure ◽  
Size And Morphology

With approximately 200 species, the tribe Sobralieae is a dominant and common Neotropical group of orchids, yet little is known of variation in floral morphology as it relates to their pollination. As currently circumscribed, the tribe includes four genera that differ considerably in flower size and morphology: Elleanthus, Epilyna, Sertifera, and Sobralia. Although nectar-foraging pollinators are known for some species, the relationships of pollination to deceit and to nectar production are all poorly understood. We examined pollination-related of nectaries and nectar characteristics (presence/absence, volume, and concentration) for major clades of Sobralieae. Some species produce abundant nectar, but many species offer no reward. When present, nectar is secreted by thickened calli at the lip base. The cells of the nectariferous calli contain starch, which is rapidly converted to sugar during a brief anthesis (often lasting only one day). Most Sobralia flowers are relatively large, bee-pollinated, with a gullet-shaped lip, false nectary, large pollinia, and offer no reward. Elleanthus flowers are relatively small with a legitimate nectar reward, and most species are hummingbird- pollinated. Hummingbird-pollinated Sobralieae flowers are relatively small, brightly colored in the perianth and/or the subtending bracts, somewhat tubular, with a lip that forms a cup around the callus for storing nectar, and pollinia that are dark and relatively small. 

scholarly journals Comparative studies on structure of the floral nectaries and the abundance of nectar production of Prunus laurocerasus L.

PROTOPLASMA ◽  
2019 ◽  
Vol 256 (6) ◽  
pp. 1705-1726 ◽  
Author(s):  
Mirosława Chwil ◽  
Mikołaj Kostryco ◽  
Renata Matraszek-Gawron
Keyword(s):  
Comparative Studies ◽  
Nectar Production ◽  
Floral Nectaries ◽  
Prunus Laurocerasus

Floral nectar production and nectary structure of a bee-pollinated shrub from Neotropical savanna

Plant Biology ◽  
2015 ◽  
Vol 18 (1) ◽  
pp. 26-36 ◽  
Author(s):  
E. Guimarães ◽  
A. Nogueira ◽  
S. R. Machado
Keyword(s):  
Neotropical Savanna ◽  
Floral Nectar ◽  
Nectar Production ◽  
Nectary Structure
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