Ergot nectar

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Analysis of Ergot Alkaloids

The principles and application of established and newer methods for the quantitative and semi-quantitative determination of ergot alkaloids in food, feed, plant materials and animal tissues are reviewed. The techniques of sampling, extraction, clean-up, detection, quantification and validation are described. The major procedures for ergot alkaloid analysis comprise liquid chromatography with ta...

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Prevalence of ergot toxicity

International Poultry Production — Volume 14 Number 1 Ergot toxicity or ergotism is caused by ingestion of cereal or grass grains infected by the fungus Claviceps purpurea. The toxic agents (alkaloids) are produced by the fungus Claviceps purprea which attacks the embryo of the developing kernel forming a sclerotium, a black tangle of vegetative fungal strands. The sclerotium may contain more t...

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The History of Ergot

Years ago a review on ergot alkaloids (EA) appeared with the title: “The biosynthesis of ergot alkaloids; the story of the unexpected” (Floss, 1980). I don’t believe that any other title could be more appropriate since the entire history of EA research, from the discovery of ergotamine almost a century ago until the present, has truly been the history of the unexpected. The beginning of modern ...

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Nectar microbes can reduce secondary metabolites in nectar and alter effects on nectar consumption by pollinators.

Secondary metabolites that are present in floral nectar have been hypothesized to enhance specificity in plant-pollinator mutualism by reducing larceny by non-pollinators, including microorganisms that colonize nectar. However, few studies have tested this hypothesis. Using synthetic nectar, we conducted laboratory and field experiments to examine the effects of five chemical compounds found in...

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Floral Nectar Guide Patterns Discourage Nectar Robbing by Bumble Bees

Floral displays are under selection to both attract pollinators and deter antagonists. Here we show that a common floral trait, a nectar guide pattern, alters the behavior of bees that can act opportunistically as both pollinators and as antagonists. Generally, bees access nectar via the floral limb, transporting pollen through contact with the plant's reproductive structures; however bees some...

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ژورنال

عنوان ژورنال: Science

سال: 1884

ISSN: 0036-8075,1095-9203

DOI: 10.1126/science.ns-4.96.512