Article (Scientific journals)
How Does Pollen Chemistry Impact Development and Feeding Behaviour of Polylectic Bees?
Vanderplanck, Maryse; Moerman, Romain; Rasmont, Pierre et al.
2014In PLoS ONE, 9 (1), p. 9
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Keywords :
Pollen; Polylectic; Bees
Abstract :
[en] Larvae and imagos of bees rely exclusively on floral rewards as a food source but host-plant range can vary greatly among bee species. While oligolectic species forage on pollen from a single family of host plants, polylectic bees, such as bumblebees, collect pollen from many families of plants. These polylectic species contend with interspecific variability in essential nutrients of their host-plants but we have only a limited understanding of the way in which chemicals and chemical combinations influence bee development and feeding behaviour. In this paper, we investigated five different pollen diets (Calluna vulgaris, Cistus sp., Cytisus scoparius, Salix caprea and Sorbus aucuparia) to determine how their chemical content affected bumblebee colony development and pollen/syrup collection. Three compounds were used to characterise pollen content: polypeptides, amino acids and sterols. Several parameters were used to determine the impact of diet on micro-colonies: (i) Number and weight of larvae (total and mean weight of larvae), (ii) weight of pollen collected, (iii) pollen efficacy (total weight of larvae divided by weight of the pollen collected) and (iv) syrup collection. Our results show that pollen collection is similar regardless of chemical variation in pollen diet while syrup collection is variable. Micro-colonies fed on S. aucuparia and C. scoparius pollen produced larger larvae (i.e. better mates and winter survivors) and fed less on nectar compared to the other diets. Pollen from both of these species contains 24-methylenecholesterol and high concentrations of polypeptides/total amino acids. This pollen nutritional “theme” seems therefore to promote worker reproduction in B. terrestris micro-colonies and could be linked to high fitness for queenright colonies. As workers are able to selectively forage on pollen of high chemical quality, plants may be evolutionarily selected for their pollen content, which might attract and increase the degree of fidelity of generalist pollinators, such as bumblebees.
Disciplines :
Entomology & pest control
Chemistry
Author, co-author :
Vanderplanck, Maryse ;  Université de Mons-Hainaut - UMH > Laboratory of Zoology
Moerman, Romain
Rasmont, Pierre
Lognay, Georges ;  Université de Liège - ULiège > Chimie et bio-industries > Analyse, qual. et risques - Labo. de Chimie analytique
Wathelet, Bernard ;  Université de Liège - ULiège > Chimie et bio-industries > Chimie biologique industrielle
Wattiez, Ruddy
Michez, Denis
Language :
English
Title :
How Does Pollen Chemistry Impact Development and Feeding Behaviour of Polylectic Bees?
Publication date :
2014
Journal title :
PLoS ONE
eISSN :
1932-6203
Publisher :
Public Library of Science, San Franscisco, United States - California
Volume :
9
Issue :
1
Pages :
9 p.
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 12 April 2014

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