Results 111 to 120 of about 113,666 (147)

A review of the methods for storing floral nectars in the field

Plant Biology, 2017
AbstractThe knowledge of floral nectar sugar characteristics, such as concentration, ratio and mass, is essential to understand the complex nature of nectar production and pollination systems. Although nectar is commonly stored in ecology, storage reliability and effectiveness have rarely been quantified.
B. Amato, S. Petit
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Nectar: properties, floral aspects, and speculations on origin

Trends in Plant Science, 2004
Although nectar is crucial for most pollinators, its evolutionary origin has received scant attention. Nectar is derived from the phloem solution. Both have high sugar concentrations (usually 10-30% solutes by fresh mass); the main solute in the phloem is sucrose, whereas nectar can also contain considerable amounts of fructose and glucose. The phloem,
Erick, De la Barrera, Park S, Nobel
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A novel role for proline in plant floral nectars

Naturwissenschaften, 2006
Plants offer metabolically rich floral nectar to attract visiting pollinators. The composition of nectar includes not only sugars, but also amino acids. We have examined the amino acid content of the nectar of ornamental tobacco and found that it is extremely rich (2 mM) in proline.
Clay, Carter, Sharoni, Shafir, Lia, Yehonatan, Reid G, Palmer, Robert, Thornburg   +4 more
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Remote perception of floral nectar by bumblebees

Oecologia, 1984
On both artificial flowers in the laboratory and certain plant species in the field, bumblebees often closely approached flowers and then departed without probing for nectar. In laboratory experiments where nectar rewards were associated with subtle visual or olfactory cues, bumblebees approached and avoided non-rewarding flowers.
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Floral Nectar Spurs and Diversification

International Journal of Plant Sciences, 1997
Key innovations are thought to be especially important adaptations that confer the ability to utilize resources in a novel manner and may therefore allow taxa to diversify. Here I review the data indicating that the evolution of floral nectar spurs represents a key innovation in Aquilegia and many additional groups.
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Floral nectar composition ofPeganum harmalaL.

Natural Product Research, 2009
Chemical composition of the floral nectar of Peganum harmala, a herbaceous medicinal perennial of the family Zygophyllaceae, was analysed using high-performance liquid chromatography technique. The nectar sugar detection experiments resulted in 33.1, 39.8 and 27.4%, respectively, for fructose, glucose and sucrose, upon which the nectar was classified ...
A, Movafeghi, M, Abedini, F, Fathiazad, M, Aliasgharpour, Y, Omidi   +4 more
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Variation in the Concentration of Floral Nectars

Journal of Economic Entomology, 1930
A preliminary report on the extent to which variation has been found in the concentration of floral nectars.
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Carbohydrate analysis of floral nectar using medium infrared

Phytochemical Analysis, 2003
Abstract An instrumental method based on a chemometric model of the medium region of the infrared (MIR) was developed to analyse total sugar content and the proportions of glucose, fructose and sucrose.
Cesar Mateo Flores, Ortiz, Ignacio Peñalosa, Castro, Luis Barbo Hernández, Portilla, Patricia Dolores Dávila, Aranda, Maria del Coro, Arizmendi   +4 more
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Does acoustic priming ‘sweeten the pot’ of floral nectar?

Ecology Letters, 2020
AbstractA recent claim that evening primrose flowers adaptively secrete nectar in response to vibrations from hovering bees lacks supporting evidence. The authors fail to demonstrate that bees can access the concealed nectar and that their visits enhance plant fitness. Reanalysis of the authors’ data raises additional concerns about their conclusions.
Robert A. Raguso, Lawrence D. Harder, Steven D. Johnson   +2 more
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The exploitation of floral nectar in Eucalyptus incrassata by honeyeaters and honeybees

Oecologia, 1979
During October and November, 1977, a study of nectar production and nectarivore foraging in Eucalyptus incrassata was conducted at Wyperfeld National Park in south-eastern Australia in order to evaluate the extent to which introduced honeybees (Apis mellifera) compete with native honeyeaters for floral nectar.
Hedley W, Bond, Wynne L, Brown
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