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https://www.readbyqxmd.com/read/28448467/chemical-composition-and-biological-activities-of-mono-and-heterofloral-bee-pollen-of-different-geographical-origins
#1
Jucilene Silva Araújo, Emerson Dechechi Chambó, Maria Angélica Pereira de Carvalho Costa, Samira Maria Peixoto Cavalcante da Silva, Carlos Alfredo Lopes de Carvalho, Leticia M Estevinho
Recent research shows variations in pollen chemical constituents and, consequently, in their therapeutic properties. Mono and multifloral bee pollen extracts were investigated for antioxidant and enzyme inhibitory activity properties, phenolic compounds and fatty acid composition. Generally, Eucalyptus spp. and multifloral extracts exhibited potent inhibitory activity against α-amylase, acetylcholinesterase, tyrosinase, lipoxygenase, lipase and hyaluronidase. On the other hand, Miconia spp. demonstrated higher antihemolytic activity...
April 27, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28444386/coevolution-with-pollinating-resin-midges-led-to-resin-filled-nurseries-in-the-androecia-gynoecia-and-tepals-of-kadsura-schisandraceae
#2
Shi-Xiao Luo, Ting-Ting Liu, Fei Cui, Zi-Yin Yang, Xiao-Ying Hu, Susanne S Renner
Background and Aims: Resin is a defence against herbivores and a floral reward in a few African and South American species whose bee pollinators collect it for nest construction. Here we describe a new role for floral resin from the Asian genus Kadsura (Schisandraceae). Kadsura tepals tightly cover a globe formed by carpels (in females) or near-fused stamens with fleshy connectives (in male flowers of most, but not all species). Methods: We carried out field observations at four sites in China and used pollinator behavioural assays, chemical analyses and time-calibrated insect and plant phylogenies to investigate the specificity of the interactions and their relationship to floral structure...
April 21, 2017: Annals of Botany
https://www.readbyqxmd.com/read/28444378/how-efficient-is-apis-cerana-hymenoptera-apidae-in-pollinating-cabbage-brassica-oleracea-var-capitata-pollination-behavior-pollinator-effectiveness-pollinator-requirement-and-impact-of-pollination
#3
Johnson Stanley, Khushboo Sah, Avupati Rns Subbanna, G Preetha, JaiPrakash Gupta
Cabbage is a cross-pollinated crop because of sporophytic self-incompatibility, and honey bees play an important role in its pollination. Though Asian honey bees, Apis cerana F., are used in pollination of cabbage, the rate of visitation, behavior, pollinator efficacy, and impact on seed-set are to be determined. Apis cerana occupy a share of 19.18% of all the flower visitors of cabbage in natural habitat of North Western Indian Himalayas. Pollination behavior in terms of peak activity, flowers processed per unit time, time spent per flower, and time spent in search of flowers are studied separately for both pollen and nectar foragers...
April 10, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28430801/honey-bees-preferentially-consume-freshly-stored-pollen
#4
Mark J Carroll, Nicholas Brown, Craig Goodall, Alexandra M Downs, Timothy H Sheenan, Kirk E Anderson
Honey bees (Apis mellifera) collect and store both honey and pollen in preserved forms. Pollen storage involves the addition of honey or nectar and oral secretions to pollen granules. It is controversial whether the duration of pollen storage alters the palatability or nutritive value of the pollen storage medium. We examined how bees utilize different-aged stored pollen during an extended pollen flow. The deposition of pollen into wax cells and subsequent consumption were monitored daily on 18 brood frames from 6 colonies over an 8d observation period...
2017: PloS One
https://www.readbyqxmd.com/read/28428861/does-the-morphological-fit-between-flowers-and-pollinators-affect-pollen-deposition-an-experimental-test-in-a-buzz-pollinated-species-with-anther-dimorphism
#5
Lislie Solís-Montero, Mario Vallejo-Marín
Some pollination systems, such as buzz-pollination, are associated with floral morphologies that require a close physical interaction between floral sexual organs and insect visitors. In these systems, a pollinator's size relative to the flower may be an important feature determining whether the visitor touches both male and female sexual organs and thus transfers pollen between plants efficiently. To date, few studies have addressed whether in fact the "fit" between flower and pollinator influences pollen transfer, particularly among buzz-pollinated species...
April 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28422139/high-pesticide-risk-to-honey-bees-despite-low-focal-crop-pollen-collection-during-pollination-of-a-mass-blooming-crop
#6
Scott H McArt, Ashley A Fersch, Nelson J Milano, Lauren L Truitt, Katalin Böröczky
Honey bees provide critical pollination services for many agricultural crops. While the contribution of pesticides to current hive loss rates is debated, remarkably little is known regarding the magnitude of risk to bees and mechanisms of exposure during pollination. Here, we show that pesticide risk in recently accumulated beebread was above regulatory agency levels of concern for acute or chronic exposure at 5 and 22 of the 30 apple orchards, respectively, where we placed 120 experimental hives. Landscape context strongly predicted focal crop pollen foraging and total pesticide residues, which were dominated by fungicides...
April 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28420790/honeybee-gut-microbiota-promotes-host-weight-gain-via-bacterial-metabolism-and-hormonal-signaling
#7
Hao Zheng, J Elijah Powell, Margaret I Steele, Carsten Dietrich, Nancy A Moran
Social bees harbor a simple and specialized microbiota that is spatially organized into different gut compartments. Recent results on the potential involvement of bee gut communities in pathogen protection and nutritional function have drawn attention to the impact of the microbiota on bee health. However, the contributions of gut microbiota to host physiology have yet to be investigated. Here we show that the gut microbiota promotes weight gain of both whole body and the gut in individual honey bees. This effect is likely mediated by changes in host vitellogenin, insulin signaling, and gustatory response...
April 18, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28404729/wings-as-impellers-honey-bees-co-opt-flight-system-to-induce-nest-ventilation-and-disperse-pheromones
#8
Jacob M Peters, Nick Gravish, Stacey A Combes
Honey bees (Apis mellifera) are remarkable fliers that regularly carry heavy loads of nectar and pollen, supported by a flight system - the wings, thorax and flight muscles - that one might assume is optimized for aerial locomotion. However, honey bees also use this system to perform other crucial tasks that are unrelated to flight. When ventilating the nest, bees grip the surface of the comb or nest entrance and fan their wings to drive airflow through the nest, and a similar wing-fanning behavior is used to disperse volatile pheromones from the Nasonov gland...
April 12, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28398581/agricultural-landscape-and-pesticide-effects-on-honey-bee-hymenoptera-apidae-biological-traits
#9
Mohamed Alburaki, Sandra J Steckel, Matthew T Williams, John A Skinner, David R Tarpy, William G Meikle, John Adamczyk, Scott D Stewart
Sixteen honey bee (Apis mellifera L.) colonies were placed in four different agricultural landscapes to study the effects of agricultural landscape and exposure to pesticides on honey bee health. Colonies were located in three different agricultural areas with varying levels of agricultural intensity (AG areas) and one nonagricultural area (NAG area). Colonies were monitored for their performance and productivity for one year by measuring colony weight changes, brood production, and colony thermoregulation...
April 8, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28376325/phylogenomic-insights-into-the-evolution-of-stinging-wasps-and-the-origins-of-ants-and-bees
#10
Michael G Branstetter, Bryan N Danforth, James P Pitts, Brant C Faircloth, Philip S Ward, Matthew L Buffington, Michael W Gates, Robert R Kula, Seán G Brady
The stinging wasps (Hymenoptera: Aculeata) are an extremely diverse lineage of hymenopteran insects, encompassing over 70,000 described species and a diversity of life history traits, including ectoparasitism, cleptoparasitism, predation, pollen feeding (bees [Anthophila] and Masarinae), and eusociality (social vespid wasps, ants, and some bees) [1]. The most well-studied lineages of Aculeata are the ants, which are ecologically dominant in most terrestrial ecosystems [2], and the bees, the most important lineage of angiosperm-pollinating insects [3]...
April 3, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28367370/longevity-extension-of-worker-honey-bees-apis-mellifera-by-royal-jelly-optimal-dose-and-active-ingredient
#11
Wenchao Yang, Yuanyuan Tian, Mingfeng Han, Xiaoqing Miao
In the Western honey bee, Apis mellifera, queens and workers have different longevity although they share the same genome. Queens consume royal jelly (RJ) as the main food throughout their life, including as adults, but workers only eat worker jelly when they are larvae less than 3 days old. In order to explore the effect of RJ and the components affecting longevity of worker honey bees, we first determined the optimal dose for prolonging longevity of workers as 4% RJ in 50% sucrose solution, and developed a method of obtaining long lived workers...
2017: PeerJ
https://www.readbyqxmd.com/read/28344920/six-years-of-instand-e-%C3%A2-v-sige-proficiency-testing-an-evaluation-of-in-vitro-allergy-diagnostics
#12
N Wojtalewicz, S Goseberg, K Kabrodt, I Schellenberg
BACKGROUND: Even though allergies are an important health issue, wide manufacturer-dependent differences in the detected amounts of allergen-specific IgE (sIgE) have repeatedly been found. These discrepancies hinder diagnostics and research into clinically significant cutoff points for life-threatening symptoms. METHODS: To evaluate whether the reported differences have led to changes in diagnostic testing, we analyzed data from six years of round robin testing (RRT, also known as proficiency testing) at the Gesellschaft zur Förderung der Qualitätssicherung in medizinischen Laboratorien e...
2017: Allergo Journal International
https://www.readbyqxmd.com/read/28337140/antioxidant-and-anti-tyrosinase-activities-of-phenolic-extracts-from-rape-bee-pollen-and-inhibitory-melanogenesis-by-camp-mitf-tyr-pathway-in-b16-mouse-melanoma-cells
#13
Liping Sun, Yan Guo, Yanxin Zhang, Yongliang Zhuang
Rape bee pollen possesses many nutritional and therapeutic properties because of its abundant nutrimental and bioactive components. In this study, free (FPE) and bound (BPE) phenolic extracts of rape bee pollen were obtained, phenolic and flavonoid contents were determined, and composition of phenolic acids was analyzed. In vitro antioxidant and anti-tyrosinase (TYR) activities of FPE and BPE were compared, and inhibitory melanogenesis of FPE was further evaluated. Results showed FPE and BPE contain total phenolic contents of 11...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28334485/pollinator-identity-and-spatial-isolation-influence-multiple-paternity-in-an-annual-plant
#14
Matthew K Rhodes, Jeremie B Fant, Krissa A Skogen
The occurrence and extent of multiple paternity is an important component of variation in plant mating dynamics. However, links between pollinator activity and multiple paternity are generally lacking, especially for plant species that attract functionally diverse floral visitors. In this study, we separated the influence of two functionally distinct floral visitors (hawkmoths and solitary bees) and characterized their impacts on multiple paternity in a self-incompatible, annual forb, Oenothera harringtonii (Onagraceae)...
March 23, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28332480/honey-bee-hairs-and-pollenkitt-are-essential-for-pollen-capture-and-removal
#15
Guillermo J Amador, Marguerite Matherne, D'Andre Waller, Megha Mathews, Stanislav N Gorb, David L Hu
While insect grooming has been observed and documented for over one hundred years, we present the first quantitative analysis of this highly dynamic process. Pollinating insects, like honey bees, purposely cover themselves with millions of pollen particles that, if left ungroomed, would make sensing and controlled flight difficult. How do they get clean? We show that the hairs on insect eyes are tuned to the pollen they collect; namely, the hairs are spaced so that they suspend pollen above the body for easy removal by the forelegs...
March 23, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28331591/synergistic-effects-of-floral-phytochemicals-against-a-bumble%C3%A2-bee-parasite
#16
Evan C Palmer-Young, Ben M Sadd, Rebecca E Irwin, Lynn S Adler
Floral landscapes comprise diverse phytochemical combinations. Individual phytochemicals in floral nectar and pollen can reduce infection in bees and directly inhibit trypanosome parasites. However, gut parasites of generalist pollinators, which consume nectar and pollen from many plant species, are exposed to phytochemical combinations. Interactions between phytochemicals could augment or decrease effects of single compounds on parasites. Using a matrix of 36 phytochemical treatment combinations, we assessed the combined effects of two floral phytochemicals, eugenol and thymol, against four strains of the bumblebee gut trypanosome Crithidia bombi...
March 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28331576/bumblebees-require-visual-pollen-stimuli-to-initiate-and-multimodal-stimuli-to-complete-a-full-behavioral-sequence-in-close-range-flower-orientation
#17
Saskia Wilmsen, Robin Gottlieb, Robert R Junker, Klaus Lunau
Flower visits are complex encounters, in which animals are attracted by floral signals, guided toward the site of the first physical contact with a flower, land, and finally take up floral rewards. At close range, signals of stamens and pollen play an important role to facilitate flower handling in bees, yet the pollen stimuli eliciting behavioral responses are poorly known. In this study, we test the response of flower-naive bumblebees (Bombus terrestris) toward single and multimodal pollen stimuli as compared to natural dandelion pollen...
March 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28287445/bee-an-object-oriented-agent-based-simulator-for-honey-bee-colonies
#18
Matthew Betti, Josh LeClair, Lindi M Wahl, Mair Zamir
We present a model and associated simulation package (www.beeplusplus.ca) to capture the natural dynamics of a honey bee colony in a spatially-explicit landscape, with temporally-variable, weather-dependent parameters. The simulation tracks bees of different ages and castes, food stores within the colony, pollen and nectar sources and the spatial position of individual foragers outside the hive. We track explicitly the intake of pesticides in individual bees and their ability to metabolize these toxins, such that the impact of sub-lethal doses of pesticides can be explored...
March 10, 2017: Insects
https://www.readbyqxmd.com/read/28281063/agroforestry-a-sustainable-environmental-practice-for-carbon-sequestration-under-the-climate-change-scenarios-a-review
#19
Farhat Abbas, Hafiz Mohkum Hammad, Shah Fahad, Artemi Cerdà, Muhammad Rizwan, Wajid Farhad, Sana Ehsan, Hafiz Faiq Bakhat
Agroforestry is a sustainable land use system with a promising potential to sequester atmospheric carbon into soil. This system of land use distinguishes itself from the other systems, such as sole crop cultivation and afforestation on croplands only through its potential to sequester higher amounts of carbon (in the above- and belowground tree biomass) than the aforementioned two systems. According to Kyoto protocol, agroforestry is recognized as an afforestation activity that, in addition to sequestering carbon dioxide (CO2) to soil, conserves biodiversity, protects cropland, works as a windbreak, and provides food and feed to human and livestock, pollen for honey bees, wood for fuel, and timber for shelters construction...
March 9, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28246574/transfer-assessment-of-carbendazim-residues-from-rape-flowers-to-apicultural-products
#20
Ying-Hong Li, Bei-Lei Zhou, Ming-Rong Qian, Qiang Wang, Hu Zhang
Carbendazim is usually used to control the Sclerotinia sclerotiorum of rapes during the flowering period. This paper presents a study on transfer assessment of carbendazim residues from rape flowers to apicultural products. In the field trials, the rapes were sprayed with carbendazim on standard dosage. Bees produced apicultural products (bee pollen, honey, and royal jelly) from sprayed rapes. Apicultural products were collected on a regular basis. Carbendazim residues were extracted from bee pollen, honey, and royal jelly, respectively...
2017: Journal of Analytical Methods in Chemistry
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