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https://www.readbyqxmd.com/read/29330667/diversity-and-phenology-of-wild-bees-in-a-highly-disturbed-tropical-dry-forest-desierto-de-la-tatacoa-huila-colombia
#1
C A Poveda-Coronel, D Riaño-Jiménez, J R Cure
Colombian tropical dry forest is considered the most endangered tropical biome due to anthropic activities. Desierto de la Tatacoa (DsT) is an example of high disturbed tropical dry forest which still maintains a high biodiversity. The objective of the study was to record the diversity and phenology of wild bees in this place by monthly sampling between December 2014 and December 2016 in a 9-km2 area. During the study, there was a prolonged El Niño-Southern Oscillation period. Bees were collected by entomological nets, malaise traps, eugenol scent trapping, and nest traps...
January 12, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/29330349/pharmacologic-inhibition-of-phospholipase-c-in-the-brain-attenuates-early-memory-formation-in-the-honeybee-apis-mellifera-l
#2
Shota Suenami, Shiori Iino, Takeo Kubo
Although the molecular mechanisms involved in learning and memory in insects have been studied intensively, the intracellular signaling mechanisms involved in early memory formation are not fully understood. We previously demonstrated that phospholipase C epsilon (PLCe), whose product is involved in calcium signaling, is almost selectively expressed in the mushroom bodies, a brain structure important for learning and memory in the honeybee. Here, we pharmacologically examined the role of phospholipase C (PLC) in learning and memory in the honeybee...
January 12, 2018: Biology Open
https://www.readbyqxmd.com/read/29327416/comparative-proteomics-studies-of-insect-cuticle-by-tandem-mass-spectrometry-application-of-a-novel-proteomics-approach-to-the-pea-aphid-cuticular-proteins
#3
Masson Victor, Arafah Karim, Voisin Sébastien, Bulet Philippe
The exoskeleton of arthropods, called cuticle, is a biological composite material consisting principally of N-acetylglucosamine polymer embedded in cuticular proteins (CPs). The CPs have been studied and characterized by mass spectrometry in several cuticular structures and in many arthropods. Such analyses were usually carried out by protein extraction using SDS detergent followed by electrophoresis, allowing detection and identification of a large number of CPs. To build a repertoire of cuticular structures from Bombyx mori, Apis mellifera and Anopheles gambiae we avoided the use of SDS and electrophoresis...
January 12, 2018: Proteomics
https://www.readbyqxmd.com/read/29324841/honey-bee-apis-mellifera-nurses-do-not-consume-pollens-based-on-their-nutritional-quality
#4
Vanessa Corby-Harris, Lucy Snyder, Charlotte Meador, Trace Ayotte
Honey bee workers (Apis mellifera) consume a variety of pollens to meet the majority of their requirements for protein and lipids. Recent work indicates that honey bees prefer diets that reflect the proper ratio of nutrients necessary for optimal survival and homeostasis. This idea relies on the precept that honey bees evaluate the nutritional composition of the foods provided to them. While this has been shown in bumble bees, the data for honey bees are mixed. Further, there is controversy as to whether foragers can evaluate the nutritional value of pollens, especially if they do not consume it...
2018: PloS One
https://www.readbyqxmd.com/read/29323206/effects-of-bt-cabbage-pollen-on-the-honeybee-apis-mellifera-l
#5
Dengxia Yi, Zhiyuan Fang, Limei Yang
Honeybees may be exposed to insecticidal proteins from transgenic plants via pollen during their foraging activity. Assessing effects of such exposures on honeybees is an essential part of the risk assessment process for transgenic Bacillus thuringiensis (Bt) cabbage. Feeding trials were conducted in a laboratory setting to test for possible effects of Cry1Ba3 cabbage pollen on Italian-derived honeybees Apis mellifera L. Newly emerged A. mellifera were fed transgenic pollen, activated Cry1Ba3 toxin, pure sugar syrup (60% w/v sucrose solution), and non-transgenic cabbage pollen, respectively...
January 11, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29321298/the-worldwide-importance-of-honey-bees-as-pollinators-in-natural-habitats
#6
Keng-Lou James Hung, Jennifer M Kingston, Matthias Albrecht, David A Holway, Joshua R Kohn
The western honey bee (Apis mellifera) is the most frequent floral visitor of crops worldwide, but quantitative knowledge of its role as a pollinator outside of managed habitats is largely lacking. Here we use a global dataset of 80 published plant-pollinator interaction networks as well as pollinator effectiveness measures from 34 plant species to assess the importance of A. mellifera in natural habitats. Apis mellifera is the most frequent floral visitor in natural habitats worldwide, averaging 13% of floral visits across all networks (range 0-85%), with 5% of plant species recorded as being exclusively visited by A...
January 10, 2018: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/29321240/pigment-dispersing-factor-expressing-neurons-convey-circadian-information-in-the-honey-bee-brain
#7
Katharina Beer, Esther Kolbe, Noa B Kahana, Nadav Yayon, Ron Weiss, Pamela Menegazzi, Guy Bloch, Charlotte Helfrich-Förster
Pigment-Dispersing Factor (PDF) is an important neuropeptide in the brain circadian network of Drosophila and other insects, but its role in bees in which the circadian clock influences complex behaviour is not well understood. We combined high-resolution neuroanatomical characterizations, quantification of PDF levels over the day and brain injections of synthetic PDF peptide to study the role of PDF in the honey bee Apis mellifera We show that PDF co-localizes with the clock protein Period (PER) in a cluster of laterally located neurons and that the widespread arborizations of these PER/PDF neurons are in close vicinity to other PER-positive cells (neurons and glia)...
January 2018: Open Biology
https://www.readbyqxmd.com/read/29315331/epormenis-cestri-secretions-in-sebastiania-schottiana-trees-cause-mass-death-of-honey-bee-apis-mellifera-larvae-in-uruguay
#8
Ciro Invernizzi, Enrique Nogueira, Pablo Juri, Estela Santos, Daniela Arredondo, Belén Branchiccela, Yamandú Mendoza, Karina Antúnez
For more than 60 years, sporadic cases of massive summer honey bee larvae mortality in colonies located near freshwater systems with abundant riparian vegetation have been reported in Uruguay. This odd phenomenon, known as "River disease" by beekeepers, can lead to colony death by depopulation. The aim of this study was to detect the causes of larvae death. Different experiments and analyses were performed using affected apiaries located between two important water courses. 1 day old larvae were the most susceptible and substances that killed the larvae were present in the nectar but not in the pollen...
2018: PloS One
https://www.readbyqxmd.com/read/29289505/impact-of-nosema-ceranae-and-nosema-apis-on-individual-worker-bees-of-the-two-host-species-apis-cerana-and-apis-mellifera-and-regulation-of-host-immune-response
#9
Chainarong Sinpoo, Robert J Paxton, Terd Disayathanoowat, Sasiprapa Krongdang, Panuwan Chantawannakul
Nosema apis and Nosema ceranae are obligate intracellular microsporidian parasites infecting midgut epithelial cells of host adult honey bees, originally Apis mellifera and Apis cerana respectively. Each microsporidia cross-infects the other host and both microsporidia nowadays have a worldwide distribution. In this study, cross-infection experiments using both N. apis and N. ceranae in both A. mellifera and A. cerana were carried out to compare pathogen proliferation and impact on hosts, including host immune response...
December 28, 2017: Journal of Insect Physiology
https://www.readbyqxmd.com/read/29287787/digestibility-and-nutritional-value-of-fresh-and-stored-pollen-for-honey-bees-apis-mellifera-scutellata
#10
Susan W Nicolson, Susana Da Silva Das Neves, Hannelie Human, Christian W W Pirk
Pollen, the main protein source for honey bees, is mixed with regurgitated nectar or honey during collection and then stored as 'bee bread' before its consumption, mainly by young nurse workers. It has been suggested that storage of pollen improves its nutritional value and digestibility, but there is little evidence for such changes. We fed two fresh pollen types of different protein content (aloe and sunflower), and two stored pollen types (sunflower and a mixed pollen), to young caged worker bees. We measured daily consumption of pollen and sucrose solution, and survival after 14 days...
December 26, 2017: Journal of Insect Physiology
https://www.readbyqxmd.com/read/29281653/genetic-diversity-and-differentiation-among-insular-honey-bee-populations-in-the-southwest-indian-ocean-likely-reflect-old-geographical-isolation-and-modern-introductions
#11
Maéva Angélique Techer, Johanna Clémencet, Christophe Simiand, Patrick Turpin, Lionel Garnery, Bernard Reynaud, Hélène Delatte
With globalization the Western honey bee has become a nearly cosmopolitan species, but it was originally restricted to the Old World. This renowned model of biodiversity has diverged into five evolutionary lineages and several geographic "subspecies." If Apis mellifera unicolor is indubitably an African subspecies endemic to Madagascar, its relationship with honey bees from three archipelagos in the southwest Indian Ocean (SWIO) hotspot of biodiversity is misunderstood. We compared recent mtDNA diversity data to an original characterization of the nuclear diversity from honey bees in the Mascarenes and Comoros archipelagos, using 14 microsatellites, but also additional mtDNA tRNALeu-cox2 analysis...
2017: PloS One
https://www.readbyqxmd.com/read/29275181/crystal-structure-of-cystathionine-%C3%AE-synthase-from-honeybee-apis-mellifera
#12
Paula Giménez-Mascarell, Tomas Majtan, Iker Oyenarte, June Ereño-Orbea, Juraj Majtan, Jaroslav Klaudiny, Jan P Kraus, Luis Alfonso Martínez-Cruz
Cystathionine β-synthase (CBS), the key enzyme in the transsulfuration pathway, links methionine metabolism to the biosynthesis of cellular redox controlling molecules. CBS catalyzes the pyridoxal-5'-phosphate-dependent condensation of serine and homocysteine to form cystathionine, which is subsequently converted into cysteine. Besides maintaining cellular sulfur amino acid homeostasis, CBS also catalyzes multiple hydrogen sulfide-generating reactions using cysteine and homocysteine as substrates. In mammals, CBS is activated by S-adenosylmethionine (AdoMet), where it can adopt two different conformations (basal and activated), but exists as a unique highly active species in fruit fly Drosophila melanogaster...
December 21, 2017: Journal of Structural Biology
https://www.readbyqxmd.com/read/29273327/quantitative-proteomics-reveals-divergent-responses-in-apis-mellifera-worker-and-drone-pupae-to-parasitization-by-varroa-destructor
#13
Carla Surlis, James C Carolan, Mary Coffey, Kevin Kavanagh
Varroa destructor is a haemophagous ectoparasite of honeybees and is considered a major causal agent of colony losses in Europe and North America. Although originating in Eastern Asia where it parasitizes Apis cerana, it has shifted hosts to the western honeybee Apis mellifera on which it has a greater deleterious effect on the individual and colony level. To investigate this important host-parasite interaction and to determine whether Varroa causes different effects on different castes we conducted a label free quantitative proteomic analysis of Varroa-parasitized and non-parasitized drone and worker Apis mellifera pupae...
December 19, 2017: Journal of Insect Physiology
https://www.readbyqxmd.com/read/29261772/a-real-time-pcr-method-for-quantification-of-the-total-and-major-variant-strains-of-the-deformed-wing-virus
#14
Emma L Bradford, Craig R Christie, Ewan M Campbell, Alan S Bowman
European honey bees (Apis mellifera) are critically important to global food production by virtue of their pollination services but are severely threatened by deformed wing virus (DWV) especially in the presence of the external parasite Varroa destructor. DWV exists as many viral strains with the two major variants (DWV-A and DWV-B) varying in virulence. A single plasmid standard was constructed containing three sections for the specific determination of DWV-A (VP2 capsid region), DWV-B (IRES) and a conserved region suitable for total DWV (helicase region)...
2017: PloS One
https://www.readbyqxmd.com/read/29258877/different-response-of-acetylcholinesterases-in-salt-and-detergent-soluble-fractions-of-honeybee-haemolymph-head-and-thorax-after-exposure-to-diazinon
#15
Gordana Glavan, Monika Kos, Janko Božič, Damjana Drobne, Jerica Sabotič, Anita Jemec Kokalj
Organophosphate pesticide diazinon is a specific inhibitor of acetylcholinesterase (AChE), which is a common neurotoxicity biomarker in environmental studies. In honeybees, AChE exists in two forms having different physiological roles, one existing as a soluble form and the other as membrane-bound. In most studies AChE activity has been analysed without paying considerable attention to different forms of AChE. In this study, we exposed honeybees Apis mellifera carnica for 10days to diazinon via oral exposure and analysed the total AChE activities in salt soluble (SS) and detergent soluble (DS) fractions...
December 16, 2017: Comparative Biochemistry and Physiology. Toxicology & Pharmacology: CBP
https://www.readbyqxmd.com/read/29249154/identifying-sources-of-environmental-contamination-in-european-honey-bees-apis-mellifera-using-trace-elements-and-lead-isotopic-compositions
#16
Xiaoteng Zhou, Mark Patrick Taylor, Peter J Davies, Shiva Prasad
Trace element concentrations (As, Mn, Pb and Zn) and Pb isotopic compositions were analysed in honey bees, wax and honey along with co-located soil and dust samples from Sydney metropolitan and Broken Hill, Australia. Compared with the other trace elements, Pearson correlations show that Pb concentrations in soil and dust had the strongest relationship to corresponding values in honey bees and their products. Dust Pb was not only highly correlated to corresponding soil values (r = 0.806, p = 0.005), it was the strongest predictor of Pb concentrations in honey bees, wax and honey (p = 0...
December 16, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29234387/antioxidant-activity-of-a-geopropolis-from-northeast-brazil-chemical-characterization-and-likely-botanical-origin
#17
Joselena M Ferreira, Caroline C Fernandes-Silva, Antonio Salatino, Dejair Message, Giuseppina Negri
Geopropolis is a product containing wax, plant resin, and soil particles. It is elaborated by stingless bees of tribe Meliponini. Methanol extracts of sample of geopropolis produced by Scaptotrigona postica ("mandaguari") in the state of Rio Grande do Norte (RN, northeast Brazil) were analyzed for the determination of standard parameters (total phenols, total flavonoids, and radical scavenging activity) and chemical characterization by HPLC-DAD-MS/MS analysis. The sample analyzed has high contents of total phenols and flavonoids, as well as high antioxidant activity...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/29230627/effect-of-pollen-extract-supplementation-on-the-varroatosis-tolerance-of-honey-bee-apis-mellifera-larvae-reared-in-vitro
#18
Vincent Piou, Jérémy Tabart, Jean-Louis Hemptinne, Angélique Vétillard
As the main source of lipids and proteins in honey bees, pollen is a major nutrient provider involved in development and health and has been studied for tolerance stimulation against pathogens and parasites. In the case of Varroa destructor Anderson & Trueman (Acari, Mesostigmata: Varroidae) parasitization, the lack of a complete laboratory system to rear both the bee larva and the acarian parasite limited the studies concerning larval nutrition effects on the bee tolerance and resistance against varroatosis...
December 11, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/29209933/evaluating-the-role-of-drone-produced-chemical-signals-in-mediating-social-interactions-in-honey-bees-apis-mellifera
#19
Gabriel Villar, Megan D Wolfson, Abraham Hefetz, Christina M Grozinger
Pheromones play a critical role in shaping societies of social insects, including honey bees, Apis mellifera. While diverse functions have been ascribed to queen- and worker-produced compounds, few studies have explored the identity and function of male-produced (drone) compounds. However, several lines of evidence suggest that drones engage in a variety of social interactions inside and outside of the colony. Here we elucidate the chemical composition of extracts of the drone mandibular gland, and test the hypothesis that compounds produced in these glands, or a synthetic blend consisting of the six main compounds, mediate drone social interactions in and out of the colony...
December 6, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/29208987/genome-wide-dna-methylation-changes-associated-with-olfactory-learning-and-memory-in-apis-mellifera
#20
You Li, Li-Zhen Zhang, Yao Yi, Wan-Wan Hu, Ya-Hui Guo, Zhi-Jiang Zeng, Zachary-Y Huang, Zi-Long Wang
The honeybee is a model organism for studying learning and memory formation and its underlying molecular mechanisms. While DNA methylation is well studied in caste differentiation, its role in learning and memory is not clear in honeybees. Here, we analyzed genome-wide DNA methylation changes during olfactory learning and memory process in A. mellifera using whole genome bisulfite sequencing (WGBS) method. A total of 853 significantly differentially methylated regions (DMRs) and 963 differentially methylated genes (DMGs) were identified...
December 5, 2017: Scientific Reports
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