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Nectar Guides
Nectar guides are markings or patterns seen in flowers of some angiosperm species, that guide pollinators to their rewards. Rewards commonly take the form of nectar, pollen, or both, but various plants produce oil, resins, scents, or waxes. Such patterns also are known as "pollen guides" and "honey guides", though some authorities argue for the abandonment of such terms in favour of ''floral guides'' (see for example Dinkel & Lunau). Pollinator visitation can select for various floral traits, including nectar guides through a process called pollinator-mediated selection. These patterns are sometimes visible to humans; for instance, the Dalmatian toadflax (''Linaria genistifolia'') has yellow flowers with orange nectar guides. However, in some plants, such as sunflowers, they are visible only when viewed in ultraviolet light. Under ultraviolet, the flowers have a darker center, where the nectaries are located, and often specific patterns upon the petals as well. This is believe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mimulus Nectar Guide UV VIS
Mimulus is a plant genus in the family Phrymaceae, which was traditionally placed in family Scrophulariaceae. The genus now contains only seven species, two native to eastern North America and the other five native to Asia, Australia, Africa, or Madagascar. In the past, about 150 species were placed in this genus, most of which have since been assigned to other genera, the majority to genus ''Erythranthe''. ''Mimulus'' species prefer wet or moist areas and are not drought resistant. Several are cultivated as ornamental garden plants. The cultivar 'Highland Red' has received the Royal Horticultural Society's Award of Garden Merit. Name ''Mimulus'' is based on the Latin word ''mimus'' ('mimic', especially in the context of acting). This may have to do with the flowers seeming to have grinning faces resembling those of monkeys. Taxonomy Before the 2012 restructuring, two large groups of species had long been recognized in the genus ''Mimulus'' as it was traditionally define ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ultraviolet
Ultraviolet (UV) is a form of electromagnetic radiation with wavelength from 10 nanometer, nm (with a corresponding frequency around 30 Hertz, PHz) to 400 nm (750 Hertz, THz), shorter than that of visible light, but longer than X-rays. UV radiation is present in sunlight, and constitutes about 10% of the total electromagnetic radiation output from the Sun. It is also produced by electric arcs and specialized lights, such as mercury-vapor lamps, tanning lamps, and black lights. Although long-wavelength ultraviolet is not considered an ionizing radiation because its photons lack the energy to ionization, ionize atoms, it can cause chemical reactions and causes many substances to glow or fluorescence, fluoresce. Consequently, the chemical and biological effects of UV are greater than simple heating effects, and many practical applications of UV radiation derive from its interactions with organic molecules. Short-wave ultraviolet light damages DNA and sterilizes surf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lars Chittka
Lars Chittka, FLS, FRES, FSB (born April 1963) is a German zoologist, ethologist and ecologist distinguished for his work on the evolution of sensory systems and cognition, using insect-flower interactions as a model. Life and career Born in Germany, Chittka studied Biology at the Georg-August-Universität Göttingen and the Free University of Berlin. He obtained his PhD degree under the supervision of Randolf Menzel at the Free University of Berlin. Chittka is a recipient of the Royal Society Wolfson Research Merit Award and an Advanced Fellowship from the European Research Council (ERC). He is also member of the German National Academy of Sciences Leopoldina, an elected Fellow of the Linnean Society (FLS), the Royal Entomological Society (FRES) as well as the Royal Society of Biology (FSB). He received the Lesley Goodman Award of the Royal Entomological Society in 2006. Lars Chittka has been an Editor of Biology’s foremost open access journal PLoS Biology since 2004, and h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yellow
Yellow is the color between green and orange on the spectrum of light. It is evoked by light with a dominant wavelength of roughly 575585 nm. It is a primary color in subtractive color systems, used in painting or color printing. In the RGB color model, used to create colors on television and computer screens, yellow is a secondary color made by combining red and green at equal intensity. Carotenoids give the characteristic yellow color to autumn leaves, corn, canaries, daffodils, and lemons, as well as egg yolks, buttercups, and bananas. They absorb light energy and protect plants from photo damage in some cases. Sunlight has a slight yellowish hue when the Sun is near the horizon, due to atmospheric scattering of shorter wavelengths (green, blue, and violet). Because it was widely available, yellow ochre pigment was one of the first colors used in art; the Lascaux cave in France has a painting of a yellow horse 17,000 years old. Ochre and orpiment pigments were us ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
