Pollen load samples from 10 hives of Apis mellifera (L.) were analyzed based on their physicochemical composition and botanical source, considering color as a parameter for quality control. In seven samples it was possible to establish the occurrence of more than 80% of a single pollen type, characterizing them as unifloral but with protein content variation. One of the samples was exclusively ...

Pollen is the main protein and lipid source for honey bees (Apis mellifera), and nutritionally impoverished landscapes pose a threat to colony development. To determine colony nutritional demands, we analyzed a yearly cycle of bee-collected pollen from colonies in the field and compared it to colony worker production and honey bee body composition, for the first time in social insects. We monit...

in present study different protein measurement methods are evaluated on the allergenic extract of chenopodium album pollen, which was previously prepared in our laboratory and applied in skin prick testing in comparison with a commer¬cial extract. the protein content of similar amounts of these two extracts which had caused similar skin reactions were measured with different protein assays such...

To fuel their activities and rear their offspring, foraging bees must obtain a sufficient quality and quantity of nutritional resources from a diverse plant community. Pollen is the primary source of proteins and lipids for bees, and the concentrations of these nutrients in pollen can vary widely among host-plant species. Therefore we hypothesized that foraging decisions of bumble bees are driv...

pollen from mesquite (prosopis juliflora) is one of the important causes of immediate hypersensitivity reactions in the arid and semi-arid regions of the world. the aim of present study is to produce and purify the recombinant form of allergenic ole e 1-like protein from the pollen of this allergenic tree. immunological and cross-inhibition assays were performed for the evaluation of ige-bindin...

“broussonetia papyrifera” (chinese mulberry) pollen is an important source of allergens in regions surrounding shanghai, china. to identify and purify major allergens from “b. papyrifera” pollen that reacted with serum antibodies from sensitized patients, “b. papyrifera” pollen was defatted, dried, and extracted proteins were separated using sp cationic exchange or q anionic exchange columns. s...

In honeybee colonies there normally is a queen that lays eggs and workers that supply food and maintain the nest. However, worker bees are able to reproduce in the absence of the queen. A variety of factors, including temperature, food, pheromones and social interactions, have an influence on ovarian development. Protein-rich diets are known to promote ovarian and egg development and, since the...

Thermoregulation plays a key role in bee foraging, allowing some species to forage in suboptimal temperatures. Recently, bumble bee thoracic temperature (T(th)) has been shown to increase with nectar carbohydrate content. However, pollen is also vital to bees and exhibits a greater than 20-fold range in protein quality. We provide the first demonstration that bee T(th) is also correlated with p...

molecular evidence on the heterogeneity present in the ole e 1 allergen of the olive pollen is emerging. such polymorphism is dependent on the cultivar origin of pollen, which also determines wide differences in the expression of this protein. determination of biochemical and molecular characteristics of ole e 1 pollen allergen in two iranian olive cultivars, namely 'rowghani' and 'zard' is nec...

a total of 65 pollen types were identified from two years atmospheric pollen survey in the environmental conditions of south assam. out of them, eight pollen types viz., acacia auriculiformis, amaranthus spinosus, cassia alata, cleome gynandra, cocos nucifera, imperata cylindrica, ricinus communis and trewia nudiflora, were selected for biochemical studies on the basis of their dominance in the...