BIOLOGY OF BACTERIOCYTE-ASSOCIATED ENDOSYMBIONTS OF PLANT SAP-SUCKING INSECTS

2005/09/09 by Paul Baumann · 1,096 citations
Agricultural and Biological Sciences · #Biology #Botany #Cocoa and Sweet Potato Agronomy #Domestication #Evolutionary biology #Gene #Genetics #Genome #Genome size #Host (biology) #Insect #Insect symbiosis and bacterial influences #Research on scale insects #Zoology

paper · doi:10.1146/annurev.micro.59.030804.121041

published in Annual Review of Microbiology 59(1), 155-189 (Annual Reviews)

openalex publication_date 2005/09/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Psyllids, whiteflies, aphids, and mealybugs are members of the suborder Sternorrhyncha and share a common property, namely the utilization of plant sap as their food source. Each of these insect groups has an obligatory association with a different prokaryotic endosymbiont, and the association is the result of a single infection followed by maternal, vertical transmission of the endosymbionts. The result of this association is the domestication of the free-living bacterium to serve the purposes of the host, namely the synthesis of essential amino acids. This domestication is probably in all cases accompanied by a major reduction in genome size. The different properties of the genomes and fragments of the genomes of these endosymbionts suggest that there are different constraints on the permissible evolutionary changes that are probably a function of the gene repertoire of the endosymbiont ancestor and the gene losses that occurred during the reduction of genome size.

Citations

• The Mutational Meltdown in Asexual Populations

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