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https://www.readbyqxmd.com/read/28651381/meta-barcoding-in-combination-with-palynological-inference-is-a-potent-diagnostic-marker-for-honey-floral-composition
#1
Rama Chandra Laha, Surajit De Mandal, Lalhmanghai Ralte, Laldinfeli Ralte, Nachimuthu Senthil Kumar, Guruswami Gurusubramanian, Ramalingam Satishkumar, Raja Mugasimangalam, Nagesh Aswathnarayana Kuravadi
Identification of floral samples present in honey is important in order to determine the medicinal value, enhance the production of honey as well as to conserve the honey bees. Traditional approaches for studying pollen samples are based on microscopic observation which is laborious, time intensive and requires specialized palynological knowledge. Present study compares two composite honey metagenome collected from 20 samples in Mizoram, Northeast India using three gene loci- rbcL, matK and ITS2 that was sequenced using a next-generation sequencing (NGS) platform (Illumina Miseq)...
December 2017: AMB Express
https://www.readbyqxmd.com/read/28650988/transcriptomic-analysis-to-uncover-genes-affecting-cold-resistance-in-the-chinese-honey-bee-apis-cerana-cerana
#2
Kai Xu, Qingsheng Niu, Huiting Zhao, Yali Du, Yusuo Jiang
The biological activity and geographical distribution of honey bees is strongly temperature-dependent, due to their ectothermic physiology. In China, the endemic Apis cerana cerana exhibits stronger cold hardiness than Western honey bees, making the former species important pollinators of winter-flowering plants. Although studies have examined behavioral and physiological mechanisms underlying cold resistance in bees, data are scarce regarding the exact molecular mechanisms. Here, we investigated gene expression in A...
2017: PloS One
https://www.readbyqxmd.com/read/28649467/larval-exposure-to-field-realistic-concentrations-of-clothianidin-has-no-effect-on-development-rate-over-winter-survival-or-adult-metabolic-rate-in-a-solitary-bee-osmia-bicornis
#3
Elizabeth Nicholls, Robert Fowler, Jeremy E Niven, James D Gilbert, Dave Goulson
There is widespread concern regarding the effects of agro-chemical exposure on bee health, of which neonicotinoids, systemic insecticides detected in the pollen and nectar of both crops and wildflowers, have been the most strongly debated. The majority of studies examining the effect of neonicotinoids on bees have focussed on social species, namely honey bees and bumble bees. However, most bee species are solitary, their life histories differing considerably from these social species, and thus it is possible that their susceptibility to pesticides may be quite different...
2017: PeerJ
https://www.readbyqxmd.com/read/28634446/are-distal-and-proximal-visual-cues-equally-important-during-spatial-learning-in-mice-a-pilot-study-of-overshadowing-in-the-spatial-domain
#4
Marie Hébert, Jan Bulla, Denis Vivien, Véronique Agin
Animals use distal and proximal visual cues to accurately navigate in their environment, with the possibility of the occurrence of associative mechanisms such as cue competition as previously reported in honey-bees, rats, birds and humans. In this pilot study, we investigated one of the most common forms of cue competition, namely the overshadowing effect, between visual landmarks during spatial learning in mice. To this end, C57BL/6J × Sv129 mice were given a two-trial place recognition task in a T-maze, based on a novelty free-choice exploration paradigm previously developed to study spatial memory in rodents...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/28631108/reproduction-number-and-asymptotic-stability-for-the-dynamics-of-a-honey-bee-colony-with-continuous-age-structure
#5
M I Betti, L M Wahl, M Zamir
A system of partial differential equations is derived as a model for the dynamics of a honey bee colony with a continuous age distribution, and the system is then extended to include the effects of a simplified infectious disease. In the disease-free case, we analytically derive the equilibrium age distribution within the colony and propose a novel approach for determining the global asymptotic stability of a reduced model. Furthermore, we present a method for determining the basic reproduction number [Formula: see text] of the infection; the method can be applied to other age-structured disease models with interacting susceptible classes...
June 19, 2017: Bulletin of Mathematical Biology
https://www.readbyqxmd.com/read/28630412/the-challenges-of-predicting-pesticide-exposure-of-honey-bees-at-landscape-level
#6
Noa Simon-Delso, Gilles San Martin, Etienne Bruneau, Christine Delcourt, Louis Hautier
To evaluate the risks of pesticides for pollinators, we must not only evaluate their toxicity but also understand how pollinators are exposed to these xenobiotics in the field. We focused on this last point and modeled honey bee exposure to pesticides at the landscape level. Pollen pellet samples (n = 60) from 40 Belgian apiaries were collected from late July to October 2011 and underwent palynological and pesticide residue analyses. Areas of various crops around each apiary were measured at 4 spatial scales...
June 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28620971/the-adipokinetic-hormone-of-the-coleopteran-suborder-adephaga-structure-function-and-comparison-of-distribution-in-other-insects
#7
Gerd Gäde, Heather G Marco
The aim of the current study is to identify the adipokinetic hormone(s) (AKHs) of a basal suborder of the species-rich Coleoptera, the Adephaga, and possibly learn more about the ancestral AKH of beetles. Moreover, we wanted to compare the ancestral AKH with AKHs of more advanced beetles, of which a number are pest insects. This would allow us to assess whether AKH mimetics would be suitable as insecticides, that is, be harmful to the pest species but not to the beneficial species. Nine species of the Adephaga were investigated and all synthesize only one octapeptide in the corpus cardiacum, as revealed by Edman degradation sequencing techniques or by mass spectrometry...
June 16, 2017: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/28618362/exposure-of-larvae-to-thiamethoxam-affects-the-survival-and-physiology-of-the-honey-bee-at-post-embryonic-stages
#8
Daiana Antonia Tavares, Claudia Dussaubat, André Kretzschmar, Stephan Malfitano Carvalho, Elaine C M Silva-Zacarin, Osmar Malaspina, Géraldine Bérail, Jean-Luc Brunet, Luc P Belzunces
Under laboratory conditions, the effects of thiamethoxam were investigated in larvae, pupae and emerging honey bees after exposure at larval stages with different concentrations in the food (0.00001 ng/μL, 0.001 ng/μL and 1.44 ng/μL). Thiamethoxam reduced the survival of larvae and pupae and consequently decreased the percentage of emerging honey bees. Thiamethoxam induced important physiological disturbances. It increased acetylcholinesterase (AChE) activity at all developmental stages and increased glutathione-S-transferase (GST) and carboxylesterase para (CaEp) activities at the pupal stages...
June 12, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28614964/thermosonication-and-optimization-of-stingless-bee-honey-processing
#9
K Y Chong, N L Chin, Y A Yusof
The effects of thermosonication on the quality of a stingless bee honey, the Kelulut, were studied using processing temperature from 45 to 90 ℃ and processing time from 30 to 120 minutes. Physicochemical properties including water activity, moisture content, color intensity, viscosity, hydroxymethylfurfural content, total phenolic content, and radical scavenging activity were determined. Thermosonication reduced the water activity and moisture content by 7.9% and 16.6%, respectively, compared to 3.5% and 6...
January 1, 2017: Food Science and Technology International, Ciencia y Tecnología de Los Alimentos Internacional
https://www.readbyqxmd.com/read/28613144/paenibacillus-apis-sp-nov-and-paenibacillus-intestini-sp-nov-isolated-from-the-intestine-of-the-honey-bee-apis-mellifera
#10
Ji-Hyun Yun, June-Young Lee, Pil Soo Kim, Mi-Ja Jung, Jin-Woo Bae
Three strains, CBM1T, CBH23 and LAH16T, belonging to the genus Paenibacillus were isolated from the midgut and hindgut of Apis mellifera. Based on 16S rRNA gene sequence analyses and phenotypic characteristics, the three strains represent two novel species. Strains CBM1T and CBH23 formed a group with Paenibacillus puldeungensis CAU 9324T, and strain LAH16T belonged to the Paenibacillusamylolyticus NRRL NRS-290T subgroup of the genus Paenibacillus. The DNA G+C contents of strains CBM1T, CBH23 and LAH16T were 47...
June 14, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28611605/different-roles-for-honey-bee-mushroom-bodies-and-central-complex-in-visual-learning-of-colored-lights-in-an-aversive-conditioning-assay
#11
Jenny A Plath, Brian V Entler, Nicholas H Kirkerud, Ulrike Schlegel, C Giovanni Galizia, Andrew B Barron
The honey bee is an excellent visual learner, but we know little about how and why it performs so well, or how visual information is learned by the bee brain. Here we examined the different roles of two key integrative regions of the brain in visual learning: the mushroom bodies and the central complex. We tested bees' learning performance in a new assay of color learning that used electric shock as punishment. In this assay a light field was paired with electric shock. The other half of the conditioning chamber was illuminated with light of a different wavelength and not paired with shocks...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/28607437/single-stranded-rna-viruses-infecting-the-invasive-argentine-ant-linepithema-humile
#12
Monica A M Gruber, Meghan Cooling, James W Baty, Kevin Buckley, Anna Friedlander, Oliver Quinn, Jessica F E J Russell, Alexandra Sébastien, Philip J Lester
Social insects host a diversity of viruses. We examined New Zealand populations of the globally widely distributed invasive Argentine ant (Linepithema humile) for RNA viruses. We used metatranscriptomic analysis, which identified six potential novel viruses in the Dicistroviridae family. Of these, three contigs were confirmed by Sanger sequencing as Linepithema humile virus-1 (LHUV-1), a novel strain of Kashmir bee virus (KBV) and Black queen cell virus (BQCV), while the others were chimeric or misassembled sequences...
June 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28603677/combined-effects-of-waggle-dance-communication-and-landscape-heterogeneity-on-nectar-and-pollen-uptake-in-honey-bee-colonies
#13
Fabian Nürnberger, Ingolf Steffan-Dewenter, Stephan Härtel
The instructive component of waggle dance communication has been shown to increase resource uptake of Apis mellifera colonies in highly heterogeneous resource environments, but an assessment of its relevance in temperate landscapes with different levels of resource heterogeneity is currently lacking. We hypothesized that the advertisement of resource locations via dance communication would be most relevant in highly heterogeneous landscapes with large spatial variation of floral resources. To test our hypothesis, we placed 24 Apis mellifera colonies with either disrupted or unimpaired instructive component of dance communication in eight Central European agricultural landscapes that differed in heterogeneity and resource availability...
2017: PeerJ
https://www.readbyqxmd.com/read/28598383/the-biology-and-control-of-the-greater-wax-moth-galleria-mellonella
#14
REVIEW
Charles A Kwadha, George O Ong'amo, Paul N Ndegwa, Suresh K Raina, Ayuka T Fombong
The greater wax moth, Galleria mellonella Linnaeus, is a ubiquitous pest of the honeybee, Apis mellifera Linnaeus, and Apis cerana Fabricius. The greater wax moth larvae burrow into the edge of unsealed cells with pollen, bee brood, and honey through to the midrib of honeybee comb. Burrowing larvae leave behind masses of webs which causes galleriasis and later absconding of colonies. The damage caused by G. mellonella larvae is severe in tropical and sub-tropical regions, and is believed to be one of the contributing factors to the decline in both feral and wild honeybee populations...
June 9, 2017: Insects
https://www.readbyqxmd.com/read/28595898/transcriptional-signatures-of-parasitization-and-markers-of-colony-decline-in-varroa-infested-honey-bees-apis-mellifera
#15
Virginia Zanni, David A Galbraith, Desiderato Annoscia, Christina M Grozinger, Francesco Nazzi
Extensive annual losses of honey bee colonies (Apis mellifera L.) reported in the northern hemisphere represent a global problem for agriculture and biodiversity. The parasitic mite Varroa destructor, in association with deformed wing virus (DWV), plays a key role in this phenomenon, but the underlying mechanisms are still unclear. To elucidate these mechanisms, we analyzed the gene expression profile of uninfested and mite infested bees, under laboratory and field conditions, highlighting the effects of parasitization on the bee's transcriptome under a variety of conditions and scenarios...
June 5, 2017: Insect Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28591204/feeding-toxicity-and-impact-of-imidacloprid-formulation-and-mixtures-with-six-representative-pesticides-at-residue-concentrations-on-honey-bee-physiology-apis-mellifera
#16
Yu Cheng Zhu, Jianxiu Yao, John Adamczyk, Randall Luttrell
Imidacloprid is the most widely used insecticide in agriculture. In this study, we used feeding methods to simulate in-hive exposures of formulated imidacloprid (Advise® 2FL) alone and mixtures with six representative pesticides for different classes. Advise, fed at 4.3 mg/L (equal to maximal residue detection of 912 ppb active ingredient [a.i.] in pollen) induced 36% mortality and 56% feeding suppression after 2-week feeding. Treatments with individual Bracket (acephate), Karate (λ-cyhalothrin), Vydate (oxamyl), Domark (tetraconazole), and Roundup (glyphosate) at residue level had a mortality range of 1...
2017: PloS One
https://www.readbyqxmd.com/read/28578396/neonicotinoid-induced-pathogen-susceptibility-is-mitigated-by-lactobacillus-plantarum-immune-stimulation-in-a-drosophila-melanogaster-model
#17
Brendan A Daisley, Mark Trinder, Tim W McDowell, Hylke Welle, Josh S Dube, Sohrab N Ali, Hon S Leong, Mark W Sumarah, Gregor Reid
Pesticides are used extensively in food production to maximize crop yields. However, neonicotinoid insecticides exert unintentional toxicity to honey bees (Apis mellifera) that may partially be associated with massive population declines referred to as colony collapse disorder. We hypothesized that imidacloprid (common neonicotinoid; IMI) exposure would make Drosophila melanogaster (an insect model for the honey bee) more susceptible to bacterial pathogens, heat stress, and intestinal dysbiosis. Our results suggested that the immune deficiency (Imd) pathway is necessary for D...
June 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28577537/large-scale-mitochondrial-dna-analysis-of-native-honey-bee-apis-mellifera-populations-reveals-a-new-african-subgroup-private-to-the-south-west-indian-ocean-islands
#18
Maéva Angélique Techer, Johanna Clémencet, Christophe Simiand, Sookar Preeaduth, Hamza Abdou Azali, Bernard Reynaud, Delatte Hélène
BACKGROUND: The South West Indian Ocean (SWIO) archipelagos and Madagascar constitute a hotspot of biodiversity with a high rate of endemism. In this area, the endemic subspecies A. m. unicolor has been described in Madagascar. It belongs to the African lineage, one of the four described evolutionary lineages in honey bees. Despite a long beekeeping tradition and several recorded European introductions, few studies have been carried out on the diversity and proportion of honey bee subspecies...
June 2, 2017: BMC Genetics
https://www.readbyqxmd.com/read/28572582/coordination-between-the-sexes-constrains-the-optimization-of-reproductive-timing-in-honey-bee-colonies
#19
Natalie J Lemanski, Nina H Fefferman
Honeybees are an excellent model system for examining how trade-offs shape reproductive timing in organisms with seasonal environments. Honeybee colonies reproduce two ways: producing swarms comprising a queen and thousands of workers or producing males (drones). There is an energetic trade-off between producing workers, which contribute to colony growth, and drones, which contribute only to reproduction. The timing of drone production therefore determines both the drones' likelihood of mating and when colonies reach sufficient size to swarm...
June 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28558268/identification-of-in-situ-flower-volatiles-from-kiwifruit-actinidia-chinensis-var-deliciosa-cultivars-and-their-male-pollenisers-in-a-new-zealand-orchard
#20
Andrew M Twidle, David M Suckling, Alan G Seal, Bruno Fedrizzi, Lisa I Pilkington, David Barker
In situ flower volatiles from six kiwifruit cultivars (Actinidia chinensis var. deliciosa); 'Hayward', 'Chieftain', 'M56', 'Zes007' (Green11), 'M36', and 'M43' were collected by dynamic headspace sampling. Forty-five compounds were detected in the headspace of the flowers, with straight chain hydrocarbons and terpenes accounting for >98% of the volatiles emitted quantitatively across the six cultivars. Of these hydrocarbons, (3Z,6Z,9Z)-heptadecatriene is reported for the first time from a floral source while (8Z)-hexadecene and (9Z)-nonadecene are reported for the first time from kiwifruit flowers...
May 27, 2017: Phytochemistry
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