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https://www.readbyqxmd.com/read/29049960/lethal-effects-of-cr-iii-alone-and-in-combination-with-propiconazole-and-clothianidin-in-honey-bees
#1
Fabio Sgolastra, Sonia Blasioli, Teresa Renzi, Simone Tosi, Piotr Medrzycki, Roberto Molowny-Horas, Claudio Porrini, Ilaria Braschi
Several anthropogenic contaminants, including pesticides and heavy metals, can affect honey bee health. The effects of mixtures of heavy metals and pesticides are rarely studied in bees, even though bees are likely to be exposed to these contaminants in both agricultural and urban environments. In this study, the lethal toxicity of Cr alone and in combination with the neonicotinoid insecticide clothianidin and the ergosterol-biosynthesis-inhibiting fungicide propiconazole was assessed in Apis mellifera adults...
October 12, 2017: Chemosphere
https://www.readbyqxmd.com/read/29043489/comparative-transcriptome-analysis-of-apis-mellifera-antennae-of-workers-performing-different-tasks
#2
Hongyi Nie, Shupeng Xu, Cuiqin Xie, Haiyang Geng, Yazhou Zhao, Jianghong Li, Wei-Fone Huang, Yan Lin, Zhiguo Li, Songkun Su
Honey bee is a social insect. Its colony is mainly coordinated by the chemical signals such as pheromones produced by queen or brood. Correspondingly, the worker bee developed numerous complicated olfactory sensilla in antennae for detection of these colony chemical signals and nectar/pollen signals in foraging. With the normal development of new emerged workers, young adults (nurse bee) worked in colony at the first 2-3 weeks and then followed by the foraging activity outside of the hive, which give rise to great change of the surrounding chemical signals...
October 17, 2017: Molecular Genetics and Genomics: MGG
https://www.readbyqxmd.com/read/29040619/sublethal-effects-of-the-neonicotinoid-insecticide-thiamethoxam-on-the-transcriptome-of-the-honey-bees-hymenoptera-apidae
#3
Teng-Fei Shi, Yu-Fei Wang, Fang Liu, Lei Qi, Lin-Sheng Yu
Neonicotinoid insecticides are now the most widely used insecticides in the world. Previous studies have indicated that sublethal doses of neonicotinoids impair learning, memory capacity, foraging, and immunocompetence in honey bees (Apis mellifera, Linnaeus) (Hymenoptera: Apidae). Despite these, few studies have been carried out on the molecular effects of neonicotinoids. In this study, we focus on the second-generation neonicotinoid thiamethoxam, which is currently widely used in agriculture to protect crops...
October 11, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/29038770/lactobacillus-apinorum-belongs-to-the-fructophilic-lactic-acid-bacteria
#4
Shintaro Maeno, Leon Dicks, Junichi Nakagawa, Akihito Endo
Potential fructophilic characteristics of Lactobacillus apinorum, originally isolated from the guts of honeybees (Apis mellifera), were studied in the present study. The species showed typical fructophilic growth characteristics, i.e., active growth on d-fructose, poor growth on d-glucose, and accelerated growth on d-glucose in the presence of electron acceptors. Biochemical characteristics strongly supported classification of the species into fructophilic lactic acid bacteria (FLAB). Furthermore, genetic analyses suggested that the species underwent extensive gene reduction, similar to that recorded for Lactobacillus kunkeei and other FLAB...
2017: Bioscience of Microbiota, Food and Health
https://www.readbyqxmd.com/read/29035869/varroa-destructor-induces-changes-in-the-expression-of-immunity-related-genes-during-the-development-of-apis-mellifera-worker-and-drone-broods
#5
Ewa A Zaobidna, Krystyna Żółtowska, Elżbieta Łopieńska-Biernat
The ectoparasitic mite Varroa destructor has emerged as the major pest of honeybees. Despite extensive research efforts, the pathogenesis of varroosis has not been fully explained. Earlier studies suggested that V. destructor infestation leads to the suppression of the host's immune system. The aim of this study was to analyze the immune responses of 14 genes in the Toll signal transduction pathways, including effector genes of antimicrobial peptides (AMPs), in developing Apis mellifera workers and drones infested with V...
December 20, 2017: Acta Parasitologica
https://www.readbyqxmd.com/read/29032464/nutritional-composition-of-honey-bee-food-stores-vary-with-floral-composition
#6
Philip Donkersley, Glenn Rhodes, Roger W Pickup, Kevin C Jones, Eileen F Power, Geraldine A Wright, Kenneth Wilson
Sufficiently diverse and abundant resources are essential for generalist consumers, and form an important part of a suite of conservation strategies for pollinators. Honey bees are generalist foragers and are dependent on diverse forage to adequately meet their nutritional needs. Through analysis of stored pollen (bee bread) samples obtained from 26 honey bee (Apis mellifera L.) hives across NW-England, we quantified bee bread nutritional content and the plant species that produced these stores from pollen...
October 14, 2017: Oecologia
https://www.readbyqxmd.com/read/29029088/plant-herbivore-and-plant-pollinator-interactions-of-the-developing-perennial-oilseed-crop-silphium-integrifolium
#7
J R Prasifka, R E Mallinger, B S Hulke, S R Larson, D Van Tassel
Sampling in Kansas and North Dakota documented the plant-herbivore and plant-pollinator interactions of the developing perennial oilseed crop, Silphium integrifolium Michx. The larva of the tortricid moth, Eucosma giganteana (Riley), was the most damaging floret- and seed-feeding pest in Kansas, with infested heads producing ≈85% (2015) or ≈45% (2016) fewer seeds than apparently undamaged heads. Necrosis of apical meristems caused stunting and delayed bloom in Kansas; though the source of the necrosis is not known, observations of the tarnished plant bug, Lygus lineolaris (Palisot de Beauvois; Hemiptera: Miridae), in S...
September 23, 2017: Environmental Entomology
https://www.readbyqxmd.com/read/29018616/integration-of-lncrna-mirna-mrna-reveals-novel-insights-into-oviposition-regulation-in-honey-bees
#8
Xiao Chen, Ce Ma, Chao Chen, Qian Lu, Wei Shi, Zhiguang Liu, Huihua Wang, Haikun Guo
BACKGROUND: The honey bee (Apis mellifera) is a highly diverse species commonly used for honey production and pollination services. The oviposition of the honey bee queen affects the development and overall performance of the colony. To investigate the ovary activation and oviposition processes on a molecular level, a genome-wide analysis of lncRNAs, miRNAs and mRNA expression in the ovaries of the queens was performed to screen for differentially expressed coding and noncoding RNAs. Further analysis identified relevant candidate genes or RNAs...
2017: PeerJ
https://www.readbyqxmd.com/read/28993499/time-is-honey-circadian-clocks-of-bees-and-flowers-and-how-their-interactions-may-influence-ecological-communities
#9
REVIEW
Guy Bloch, Noam Bar-Shai, Yotam Cytter, Rachel Green
The interactions between flowering plants and insect pollinators shape ecological communities and provide one of the best examples of coevolution. Although these interactions have received much attention in both ecology and evolution, their temporal aspects are little explored. Here we review studies on the circadian organization of pollination-related traits in bees and flowers. Research, mostly with the honeybee, Apis mellifera, has implicated the circadian clock in key aspects of their foraging for flower rewards...
November 19, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28993484/interneurons-in-the-honeybee-primary-auditory-center-responding-to-waggle-dance-like-vibration-pulses
#10
Hiroyuki Ai, Kazuki Kai, Ajayrama Kumaraswamy, Hidetoshi Ikeno, Thomas Wachtler
Female honeybees use the 'waggle dance' to communicate the location of nectar sources to their hive mates. Distance information is encoded in the duration of the waggle phase (von Frisch, 1967). During the waggle phase the dancer produces trains of vibration pulses, which are detected by the follower bees via Johnston's organ located on the antennae. To uncover the neural mechanisms underlying the encoding of distance information in the waggle dance follower, we investigated morphology, physiology, and immunohistochemistry of interneurons arborizing in the primary auditory center of the honeybee (Apis mellifera)...
October 9, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28988368/post-embryonic-development-of-the-malpighian-tubules-in-apis-mellifera-hymenoptera-workers-morphology-remodeling-apoptosis-and-cell-proliferation
#11
Wagner Gonzaga Gonçalves, Kenner Morais Fernandes, Weyder Cristiano Santana, Gustavo Ferreira Martins, José Cola Zanuncio, José Eduardo Serrão
The honeybee Apis mellifera has ecological and economic importance; however, it experiences a population decline, perhaps due to exposure to toxic compounds, which are excreted by Malpighian tubules. During metamorphosis of A. mellifera, the Malpighian tubules degenerate and are formed de novo. The objective of this work was to verify the cellular events of the Malpighian tubule renewal in the metamorphosis, which are the gradual steps of cell remodeling, determining different cell types and their roles in the excretory activity in A...
October 7, 2017: Protoplasma
https://www.readbyqxmd.com/read/28987622/immune-responses-in-the-haemolymph-and-antimicrobial-peptide-expression-in-the-abdomen-of-apis-mellifera-challenged-with-spiroplasma-melliferum-ch-1
#12
Donghang Yang, Guodong Zha, Xia Li, Han Gao, Hanshou Yu
Spiroplasma melliferum generally parasitizes honeybees and is one of main pathogens causing 'bee creeping disease' in China. Spiroplasma melliferum can be spread through honeybee pollination, which causes severe economic losses to apiculture. The design of this study was based on previous studies that utilized an in vitro bioassay to investigate the effects of S. melliferum CH-1 infection. We identified invasive S. melliferum CH-1 within Apis mellifera using transmission electron microscopy and investigated the immune response of honeybees infected with S...
October 5, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28982990/complete-genome-sequence-of-deformed-wing-virus-isolated-from-vespa-crabro-in-italy
#13
Mario Forzan, Antonio Felicioli, Simona Sagona, Patrizia Bandecchi, Maurizio Mazzei
In this article, we document the first isolation of a replication-competent deformed wing virus from Vespa crabro in Italy. Although the virus has never been isolated from this insect, the sequence of this virus shows a strong sequence homology with isolates obtained from Apis mellifera, which is considered its natural host.
October 5, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28981639/nutritional-regulation-of-phenotypic-plasticity-in-a-solitary-bee-hymenoptera-megachilidae
#14
Brielle J Fischman, Theresa L Pitts-Singer, Gene E Robinson
Phenotypic plasticity involves adaptive responses to predictable environmental fluctuations and may promote evolutionary change. We studied the regulation of phenotypic plasticity in an important agricultural pollinator, the solitary alfalfa leafcutting bee (Megachile rotundata F.). Specifically, we investigated how larval nutrition affects M. rotundata diapause plasticity and how diapause plasticity affects adult female reproductive behavior. Field surveys and laboratory manipulations of aspects of larval diet demonstrated nutritional regulation of M...
July 24, 2017: Environmental Entomology
https://www.readbyqxmd.com/read/28981563/identification-of-genes-related-to-high-royal-jelly-production-in-the-honey-bee-apis-mellifera-using-microarray-analysis
#15
Hongyi Nie, Xiaoyan Liu, Jiao Pan, Wenfeng Li, Zhiguo Li, Shaowu Zhang, Shenglu Chen, Xiaoqing Miao, Nenggan Zheng, Songkun Su
China is the largest royal jelly producer and exporter in the world, and high royal jelly-yielding strains have been bred in the country for approximately three decades. However, information on the molecular mechanism underlying high royal jelly production is scarce. Here, a cDNA microarray was used to screen and identify differentially expressed genes (DEGs) to obtain an overview on the changes in gene expression levels between high and low royal jelly producing bees. We developed a honey bee gene chip that covered 11,689 genes, and this chip was hybridised with cDNA generated from RNA isolated from heads of nursing bees...
October 2, 2017: Genetics and Molecular Biology
https://www.readbyqxmd.com/read/28977020/age-specific-olfactory-attraction-between-western-honey-bee-drones-apis-mellifera-and-its-chemical-basis
#16
Florian Bastin, Fabrice Savarit, Grégory Lafon, Jean-Christophe Sandoz
During the mating season, drones (males) of the Western honey bee (Apis mellifera) form congregations numbering thousands high in the air. Virgin queens arrive at these congregations after they have formed and mate on the fly with 15-20 drones. To explain the formation of drone congregations, a drone-produced aggregation pheromone has been proposed many years ago but due to the low accessibility of natural mating sites in bees, its study has progressed slowly. Recently, we used a walking simulator in controlled laboratory conditions to show that drones are indeed attracted by groups of other drones...
2017: PloS One
https://www.readbyqxmd.com/read/28973572/a-comparison-of-wolbachia-infection-frequencies-in-varroa-with-prevalence-of-deformed-wing-virus
#17
Thorben Grau, Annely Brandt, Sara DeLeon, Marina Doris Meixner, Jakob Friedrich Strauß, Gerrit Joop, Arndt Telschow
Wolbachia are widely distributed bacterial endosymbionts of arthropods and filarial nematodes. These bacteria can affect host fitness in a variety of ways, such as protecting hosts against viruses and other pathogens. Here, we investigate the possible role of Wolbachia in the prevalence of the deformed wing virus (DWV), a highly virulent pathogen of honey bees (Apis mellifera) that is transmitted by parasitic Varroa mites (Varroa destructor). About 180 Varroa mites from 18 beehives were tested for infection with Wolbachia and DWV...
May 1, 2017: Journal of Insect Science
https://www.readbyqxmd.com/read/28973493/survey-of-hatching-spines-of-bee-larvae-including-those-of-apis-mellifera-hymenoptera-apoidea
#18
Jerome G Rozen, Corey Shepard Smith, James H Cane
This article explores the occurrence of hatching spines among bee taxa and how these structures enable a larva on hatching to extricate itself from the egg chorion. These spines, arranged in a linear sequence along the sides of the first instar just dorsal to the spiracles, have been observed and recorded in certain groups of solitary and cleptoparasitic bee taxa. After eclosion, the first instar remains loosely covered by the egg chorion. The fact that this form of eclosion has been detected in five families (Table 1 identifies four of the families...
July 1, 2017: Journal of Insect Science
https://www.readbyqxmd.com/read/28968582/a-3-year-survey-of-italian-honey-bee-collected-pollen-reveals-widespread-contamination-by-agricultural-pesticides
#19
Simone Tosi, Cecilia Costa, Umberto Vesco, Giancarlo Quaglia, Giovanni Guido
Honey bee (Apis mellifera L.) health is compromised by complex interactions between multiple stressors, among which pesticides play a major role. To better understand the extent of honey bee colonies' exposure to pesticides in time and space, we conducted a survey by collecting corbicular pollen from returning honey bee foragers in 53 Italian apiaries during the active beekeeping season of 3 subsequent years (2012-2014). Of 554 pollen samples analysed for pesticide residues, 62% contained at least one pesticide...
September 29, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28966892/bacterial-community-associated-with-worker-honeybees-apis-mellifera-affected-by-european-foulbrood
#20
Tomas Erban, Ondrej Ledvinka, Martin Kamler, Bronislava Hortova, Marta Nesvorna, Jan Tyl, Dalibor Titera, Martin Markovic, Jan Hubert
BACKGROUND: Melissococcus plutonius is an entomopathogenic bacterium that causes European foulbrood (EFB), a honeybee (Apis mellifera L.) disease that necessitates quarantine in some countries. In Czechia, positive evidence of EFB was absent for almost 40 years, until an outbreak in the Krkonose Mountains National Park in 2015. This occurrence of EFB gave us the opportunity to study the epizootiology of EFB by focusing on the microbiome of honeybee workers, which act as vectors of honeybee diseases within and between colonies...
2017: PeerJ
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