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Environment or kin: whence do bees obtain acidophilic bacteria? | LitMetric

Environment or kin: whence do bees obtain acidophilic bacteria?

Mol Ecol

Section of Integrative Biology, University of Texas at Austin, 2401 Speedway Drive #C0930. Austin, TX 78712, USA.

Published: April 2012

AI Article Synopsis

  • Honey bee population decline has sparked interest in how bees interact with microorganisms, especially focusing on the relationship between sweat bees and acidophilic bacteria.
  • Researchers used advanced sequencing methods to study the bacterial communities in North American and Neotropical sweat bees, finding that Lactobacillus species were prevalent in many samples.
  • The study suggests that sweat bees may acquire beneficial lactobacilli from both maternal inheritance and environmental sources like flowers, with these bacteria potentially helping to prevent mold growth in their nests.

Article Abstract

As honey bee populations decline, interest in pathogenic and mutualistic relationships between bees and microorganisms has increased. Honey bees and bumble bees appear to have a simple intestinal bacterial fauna that includes acidophilic bacteria. Here, we explore the hypothesis that sweat bees can acquire acidophilic bacteria from the environment. To quantify bacterial communities associated with two species of North American and one species of Neotropical sweat bees, we conducted 16S rDNA amplicon 454 pyrosequencing of bacteria associated with the bees, their brood cells and their nests. Lactobacillus spp. were the most abundant bacteria in many, but not all, of the samples. To determine whether bee-associated lactobacilli can also be found in the environment, we reconstructed the phylogenetic relationships of the genus Lactobacillus. Previously described groups that associate with Bombus and Apis appeared relatively specific to these genera. Close relatives of several bacteria that have been isolated from flowers, however, were isolated from bees. Additionally, all three sweat bee species associated with lactobacilli related to flower-associated lactobacilli. These data suggest that there may be at least two different means by which bees acquire putative probiotics. Some lactobacilli appear specific to corbiculate apids, possibly because they are largely maternally inherited (vertically transmitted). Other lactobacilli, however, may be regularly acquired from environmental sources such as flowers. Sweat bee-associated lactobacilli were found to be abundant in the pollen and frass inside the nests of halictids, suggesting that they could play a role in suppressing the growth of moulds and other spoilage organisms.

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Source
http://dx.doi.org/10.1111/j.1365-294X.2012.05496.xDOI Listing

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