Results 261 to 270 of about 51,993 (280)
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The Production and Protection of Nectars
2012Nectar secretion serves two important mutualisms. Floral nectar (FN) mediates pollination whereas extrafloral nectar (EFN) serves the indirect defence against herbivores. Research over the last decade has focused on the anti-microbial protection of nectars.
María Escalante-Pérez, Martin Heil
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INHERITANCE OF NECTAR PRODUCTION IN BIRDSFOOT TREFOIL
Canadian Journal of Plant Science, 1982Significant differences in nectar production were observed among seven cultivars and one germplasm release of birdsfoot trefoil (Lotus corniculatus L.). The cultivars Carroll and Leo were consistently higher and Maitland consistently lower in μ1 nectar/umbel produced.
DOROTHY C. MURRELL +2 more
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The effect of nectar production on neighborhood size
Oecologia, 1982Bumblebee foraging behavior was observed on two plant species with similar floral and inflorescence structures. One species produces nectar while the other does not. Bees, upon visiting nectar producing flowers tend to empty them of nectar and by frequently moving between close neighbors, create a patchily distributed resource base. Bees maximize their
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Nectar Production and Flower Visitors of Asclepias verticillata
American Midland Naturalist, 1979Asclepias verticillata is self-incompatible and can propagate vegetatively. Nectar is produced mainly between 1800 and 2200 hr, throughout the 4-5 day life of the flower. Insect visitations at this time were infrequent on all four study sites, a seemingly anomalous situation ; most pollinia vectors visited the flowers during the day.
Mary F. Willson +2 more
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Functional genomics of nectar production in the Brassicaceae
Flora - Morphology, Distribution, Functional Ecology of Plants, 2012Abstract Nectar is a reward commonly offered by plants to attract potential pollinators, thereby ensuring outcrossing and efficient pollination. Until recently, little research has focused on the molecular components of nectar synthesis, and only a handful of genes have been shown to have a direct effect on nectary function.
Ricci Bender +8 more
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NECTAR PRODUCTION PATTERNS IN IPOMOPSIS AGGREGATA (POLEMONIACEAE)
American Journal of Botany, 1983This study describes nectar production patterns for Ipomopsis aggregata and discusses their potential adaptive and ecological significance. It also examines the influence of environmental and other factors on nectar production rate (NPR) and nectar sugar concentration. For I. aggregata there were no NPR differences with flower age.
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Morphological correlates of nectar production used by honeybees
Ecological Entomology, 2006Abstract 1. Honeybees foraging on lavender have been shown to choose inflorescences that are larger and have more flowers. If they are selecting optimally then these inflorescences should yield higher net rates of energy gain.
A. D. HIGGINSON +2 more
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Onion Hybrid Seed Production: Relation with Nectar Composition and Flower Traits
Journal of Economic Entomology, 2018Onion (Allium cepa L.) is one of the main vegetable crops. Pollinators are required for onion seed production, being honeybees the most used. Around the world, two types of onion varieties are grown: open pollinated (OP) and hybrids. Hybrids offer numerous advantages to growers, but usually have lower seed yields than OP cultivars, which in many cases ...
Soto Vargas, Verónica Carolina +3 more
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Optimal nectar production in a hummingbird pollinated plant
Theoretical Population Biology, 1981Abstract It is hypothesized that the average rate of nectar production per flower for a population of plants is such than an individual plant which possesses this rate has maximum fitness (i.e., is optimal). This basic hypothesis is used to develop predictions concerning nectar production in scarlet gilia ( Ipomopsis aggregata ), a hummingbird ...
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Nectar Production, Flowering Phenology, and Strategies for Pollination
1990Abstract In this chapter I focus on one general question exemplifying the interactions between plants and their biotic pollinators: Can plants manipulate their pollinators to their own advantage? In other words, do plants possess phenotypic traits that are heritable, variable, and capable of influencing foraging decisions?
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