Results 101 to 110 of about 442,091 (288)
Stacked scattering: The key to bright flowers lies in the mesophyll
American Journal of Botany, EarlyView.Abstract Premise The coloration of flowers is caused by wavelength‐selective absorption by pigments and scattering of light by floral structures. Although the molecular, physiological, and chemical properties of floral pigments have been studied in considerable detail, how floral structures contribute to the visual signal remains largely unknown.
Larissa De Paola +5 more
wiley +1 more source
Temperature and the evolution of flower color: A review
American Journal of Botany, EarlyView.Abstract Flower colors brighten our natural world. How and why have they evolved? How might ongoing global warming alter their evolutionary trajectories? In this review, I examine the influence of ambient temperature on the evolution of flower color.
Elizabeth P. Lacey
wiley +1 more source
Assessment of pollen-mediated transgene flow in citrus under experimental field conditions [PDF]
, 2015 Despite potential benefits granted by genetically modified (GM) citrus trees, their release and commercialization raises concerns about their potential environmental impact.
Navarro, Antonio +3 more
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American Journal of Botany, EarlyView.Abstract Why did it take so long for angiosperms to diversify after they arose? Here I consider the indirect but potentially crucial impact of the “photosynthetic revolution” on plant–herbivore coevolution. Increased vein density in fossil leaves implies a doubling in photosynthesis 125–100 million years ago.
Thomas J. Givnish
wiley +1 more source
American Journal of Botany, EarlyView.Abstract Premise Pollination by beetles is relatively rare in orchids, and this has been attributed to the clumsy behavior of beetles being unsuitable for the precise pollen transfer mechanisms that characterize the orchid family. We investigated floral specialization for beetle pollination in the rare fire‐dependent South African orchid Disa elegans ...
Steven D. Johnson +3 more
wiley +1 more source
Comparison between Poaceae Airborne Pollen Counts and Phl p5 Aeroallergen Quantification in South Europe [PDF]
, 2010 The European project HIALINE: Comparison between Poaceae Airborne Pollen Counts and Phl p5 Aeroallergen Quantification in South Europe C. Antunes1,2, R. Ferro2, R. Ribeiro2, Torres M.C.4, M.J. Velasco4H.
Antunes, Celia M. +7 more
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Do Skin Prick Tests Predict Nasal Provocation Test Outcomes in Allergic Rhinitis Patients?
International Forum of Allergy &Rhinology, EarlyView.ABSTRACT Background In diagnosing allergic rhinitis (AR), conventional skin prick tests (SPTs) often fail to reflect allergen‐induced nasal symptoms. Conversely, nasal provocation tests (NPTs) provide more definitive assessments but are less accessible.
Yunhyung Lee +3 more
wiley +1 more source
Applications in Plant Sciences, EarlyView.Abstract Premise Stable transformation is the biggest barrier to studying gene function in plants. In most species, transformation requires tissue culture and regeneration methods that may be arduous and cause undesirable genetic changes. Floral dip methods bypass these challenges by directly transforming ovules of developing flowers, but these methods
Lauren E. Stanley, David B. Lowry
wiley +1 more source
Environment Conservation Journal, 2017 Pollen germination and pollen tube growth are prerequisites for fertilization in seed bearing plants. The present study deals with the morphology, production, pollen-ovule ratio, and effect of sucrose on in-vitro germination of pollen grains of Gloriosa ...
P. Tiwari +2 more
doaj +1 more source
A Route for the Transfer of Materials Through the Pollen Grain Wall [PDF]
, 1959 John R. Rowley +2 more
openalex +1 more source