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Pollen host choice in bees is in many cases highly conserved, which might partly be due to physiological limitations of bee larvae to digest non‐host pollen. These limitations need to be overcome in order to incorporate new pollen hosts; however, the mechanisms underlying such host expansion are poorly understood.In this study, we examined intra‐ and interpopulational variation in the ability of larvae...
1. Given the enormous quantitative pollen requirements of bees and their high efficiency in pollen removal, flowers should balance the need to attract bees for pollination on the one hand and to restrict pollen loss to bees on the other hand. Although various morphological flower traits have been identified that reduce excessive pollen losses to bees, the question of whether pollen might also be chemically...
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