Variation in Nectar Volume and Sugar Concentration of Allium ursinum L. ssp. ucrainicum in Three Habitats

Floral nectar volume and concentration of ramson (Allium ursinum L. ssp. ucrainicum) were investigated in three different habitats, including two types of sessile oak-hornbeam association on brown forest soil with clay illuviation and a silver lime-flowering ash rock forest association on rendzina....

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Bibliographic Details
Published in:	TheScientificWorld 2012-01, Vol.2012, p.138579-7
Main Authors:	Farkas, Ágnes, Molnár, Réka, Morschhauser, Tamás, Hahn, István
Format:	Article
Language:	eng
Subjects:	Allium Allium - chemistry Allium - metabolism Allium ursinum Carbohydrates - analysis Chemical properties Clay soils Ecosystem Environmental aspects Flowers Flowers & plants Forest soils Forests Habitat (Ecology) Habitats Humidity Lime Nectar Physiological aspects Plant ecology Plant Nectar Plant reproduction Soil conditions Soil lime Soil properties Sugar
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Summary:	Floral nectar volume and concentration of ramson (Allium ursinum L. ssp. ucrainicum) were investigated in three different habitats, including two types of sessile oak-hornbeam association on brown forest soil with clay illuviation and a silver lime-flowering ash rock forest association on rendzina. Daily nectar production ranged from 0.1 to 3.8 μL per flower with sugar concentrations of 25 to 50%. Mean nectar volumes and concentrations showed significant differences between freely exposed flowers and covered flowers, which had been isolated from flower visitors 24 h prior to nectar studies. Both the amount and quality of nectar were affected by microclimatic conditions and soil properties and varied between populations at different habitats. In the silver lime-flowering ash rock-forest association mean nectar volumes and concentrations were lower than in a typical sessile oak-hornbeam association on three occasions, the difference being significant in two cases. During full bloom, the date of sampling did not have a profound effect on either nectar volume or concentration.
ISSN:	1537-744X 2356-6140 1537-744X