Results 251 to 260 of about 29,316 (287)

Ecological context influences pollinator deterrence by alkaloids in floral nectar

Ecology Letters, 2007
AbstractSecondary compounds may benefit plants by deterring herbivores, but the presence of these defensive chemicals in floral nectar may also deter beneficial pollinators. This trade‐off between sexual reproduction and defense has received minimal study.
Robert J, Gegear, Jessamyn S, Manson, James D, Thomson   +2 more
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Bacterial communities in floral nectar

Environmental Microbiology Reports, 2011
Summary Floral nectar is regarded as the most important reward available to animal‐pollinated plants to attract pollinators. Despite the vast amount of publications on nectar properties, the role of nectar as a natural bacterial habitat is yet unexplored.
Svetlana, Fridman, Ido, Izhaki, Yoram, Gerchman, Malka, Halpern   +3 more
openaire   +2 more sources

CYCLOIDEA-like genes control floral symmetry, floral orientation, and nectar guide patterning

The Plant Cell, 2023
Abstract Actinomorphic flowers usually orient vertically (relative to the horizon) and possess symmetric nectar guides, while zygomorphic flowers often face horizontally and have asymmetric nectar guides, indicating that floral symmetry, floral orientation, and nectar guide patterning are correlated.
Xia Yang, Yang Wang, Tian-Xia Liu, Qi Liu, Jing Liu, Tian-Feng Lü, Rui-Xue Yang, Feng-Xian Guo, Yin-Zheng Wang   +8 more
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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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Green roof effects on floral phenology and floral nectar resources

2023
This study investigates the potential for green roofs to support pollinator diversity and abundance in urban ecosystems through the altered floral phenology and floral abundance of plants. I compare floral phenology and the floral abundance of green roof plants to plants grown at grade on the Front Range in Fort Collins, Colorado, and how these changes
Ruszkowski, Kyle M., Bousselot, Jennifer, Hufbauer, Ruth, Krishnan, Sarada   +3 more
openaire   +1 more source

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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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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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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NMR-Based Metabolic Profiling ofAnigozanthosFloral Nectar

Journal of Natural Products, 2008
Nuclear magnetic resonance spectroscopic methods have been used to characterize the chemical composition of floral nectar of Anigozanthos species with a minimum of sample preparation and without derivatization. The nectar of this passerine-pollinated plant is largely dominated by glucose and fructose, while sucrose occurs only at a minor level ...
Hölscher, D., Brand, S., Wenzler, M., Schneider, B.   +3 more
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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
openaire   +2 more sources