We compared the mortality of honeybee (Apis mellifera) drone and worker larvae from a single queen under controlled in vitro conditions following infection with Paenibacillus larvae, a bacterium causing the brood disease American Foulbrood (AFB). We also determined absolute P. larvae cell numbers and lethal titres in deceased individuals of both sexes up to 8 days post infection using quantitative real-time PCR (qPCR). Our results show that in drones the onset of infection induced mortality is delayed by 1 day, the cumulative mortality is reduced by 10% and P. larvae cell numbers are higher than in worker larvae. Since differences in bacterial cell titres between sexes can be explained by differences in body size, larval size appears to be a key parameter for a lethal threshold in AFB tolerance. Both means and variances for lethal thresholds are similar for drone and worker larvae suggesting that drone resistance phenotypes resemble those of related workers.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1111/j.1462-2920.2010.02257.x | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Acetamiprid Exposure Disrupts Gut Microbiota in Adult and Larval Worker Honeybees ( L.).
Insects
November 2024
Honeybee Research Institute, Jiangxi Agricultural University, Nanchang 330045, China.
Acetamiprid is a third-generation neonicotinoid insecticide that is now widely employed for the protection of crops grown in outdoor environments. This is because it is considerably less toxic to pollinating insects than other neonicotinoids. Previous studies have shown that acetamiprid has direct physiological effects on adult and larval bees.
View Article and Find Full Text PDFMolecular Basis of Eusocial Complexity: The Case of Worker Reproductivity in Bees.
Genome Biol Evol
December 2024
School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK.
In eusocial insects, the molecular basis of worker reproductivity, including how it changes with eusocial complexity, remains relatively poorly understood. To address this, we used mRNA-seq to isolate genes differentially expressed between ovary-active and ovary-inactive workers in the intermediately eusocial bumblebee Bombus terrestris. By comparisons with data from the advanced eusocial honeybee Apis mellifera, which shows reduced worker reproductivity, we characterized gene expression differences associated with change in worker reproductivity as a function of eusocial complexity.
View Article and Find Full Text PDFArticle Synopsis
- The literature review focuses on identifying larvae of the Calopterygoidea group in the Oriental Realm, aiming to help researchers classify them accurately despite scattered information.
- It offers a comprehensive key for families and some generas, highlighting areas where knowledge is lacking regarding larvae identification.
- Of the 50 genera in the region, larvae for 28 are known, but many still lack clear morphological traits for confident identification, especially in the Chlorocyphidae family.
Planting date in South Kivu, eastern DR Congo: A real challenge for the sustainable management of Spodoptera frugiperda (Lepidoptera: Noctuidae) by smallholder farmers.
PLoS One
December 2024
Functional and Evolutionary Entomology, Gembloux Agro-Bio Tech, Liege University, Liege, Belgium.
There is growing research interest in the fall armyworm (FAW) Spodoptera frugiperda, a polyphagous insect that is a major pest of maize crops worldwide. We investigated the relationship between planting date of maize and FAW infestation in South Kivu, eastern Democratic Republic of Congo, in two sampling seasons (September to October 2020 and February to March 2021). Five planting dates were considered for 45 fields in each season.
View Article and Find Full Text PDFComparative Analysis of PGRP Family in Polymorphic Worker Castes of .
Int J Mol Sci
November 2024
State Key Laboratory of Green Pesticide, "Belt and Road" Technology Industry and Innovation Institute for Green and Biological Control of Agricultural Pests, College of Plant Protection, South China Agricultural University, Guangzhou 510642, China.
Peptidoglycan recognition proteins (PGRPs) are a class of pattern recognition receptors (PRRs) that activate the innate immune system in response to microbial infection by detection of peptidoglycan, a distinct component of bacterial cell walls. Bioinformatic studies have revealed four PGRPs in the red imported fire ant ; nonetheless, the mechanism of the immune response of induced by pathogens is still poorly understood. The peptidoglycan recognition protein full-length cDNA (designated as -) from was used in this investigation.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!