keyword
MENU ▼
Read by QxMD icon Read
search

bee pollen

keyword
https://www.readbyqxmd.com/read/28808562/floral-scent-and-species-divergence-in-a-pair-of-sexually-deceptive-orchids
#1
Daniel D L Gervasi, Marc-Andre Selosse, Mathieu Sauve, Wittko Francke, Nicolas J Vereecken, Salvatore Cozzolino, Florian P Schiestl
Speciation is typically accompanied by the formation of isolation barriers between lineages. Commonly, reproductive barriers are separated into pre- and post-zygotic mechanisms that can evolve with different speed. In this study, we measured the strength of different reproductive barriers in two closely related, sympatric orchids of the Ophrys insectifera group, namely Ophrys insectifera and Ophrys aymoninii to infer possible mechanisms of speciation. We quantified pre- and post-pollination barriers through observation of pollen flow, by performing artificial inter- and intraspecific crosses and analyzing scent bouquets...
August 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28798863/pollination-success-following-loss-of-a-frequent-pollinator-the-role-of-compensatory-visitation-by-other-effective-pollinators
#2
Allysa C Hallett, Randall J Mitchell, Evan R Chamberlain, Jeffrey D Karron
Pollinator abundance is declining worldwide and may lower the quantity and quality of pollination services to flowering plant populations. Loss of an important pollinator is often assumed to reduce the amount of pollen received by stigmas of a focal species (pollination success), yet this assumption has rarely been tested experimentally. The magnitude of the effect, if any, may depend on the relative efficiency of the remaining pollinators, and on whether the loss of one pollinator leads to changes in visitation patterns by other pollinators...
May 2017: AoB Plants
https://www.readbyqxmd.com/read/28792676/the-messenger-matters-pollinator-functional-group-influences-mating-system-dynamics
#3
Jennifer J Weber
The incredible diversity of plant mating systems has fuelled research in evolutionary biology for over a century. Currently, there is broad concern about the impact of rapidly changing pollinator communities on plant populations. Very few studies, however, examine patterns and mechanisms associated with multiple paternity from cross-pollen loads. Often, foraging pollinators collect a mixed pollen load that may result in the deposition of pollen from different sires to receptive stigmas. Coincident deposition of self- and cross-pollen leads to interesting mating system dynamics and has been investigated in numerous species...
August 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28762598/heteranthery-as-a-solution-to-the-demands-for-pollen-as-food-and-for-pollination-legitimate-flower-visitors-reject-flowers-without-feeding-anthers
#4
José Neiva Mesquita-Neto, Bruna Karen Pinheiro Costa, Clemens Schlindwein
Heteranthery, the presence of feeding and pollinating anthers in the same flower, seems to mediate the evolutionary dilemma for plants to protect their gametes and yet provide food for pollinators. This study aims to elucidate the role of heteranthery in the buzz-pollinated Senna reniformis. The fecundity of pollen from long, medium and short-sized anthers was determined by hand cross-pollination experiments, and the quantity, size, ornamentation and viability of pollen of different anthers were compared. Rates of flower rejection by bees were measured in anther removal experiments to assess the preferences of flower visitors for feeding or pollinating anthers...
August 1, 2017: Plant Biology
https://www.readbyqxmd.com/read/28749609/ricochet-pollination-in-senna-fabaceae-petals-deflect-pollen-jets-and-promote-division-of-labour-among-flower-organs
#5
Thiago Amorim, Brigitte Marazzi, Arlete A Soares, Eliana R Forni-Martins, Celli R Muniz, Christian Westerkamp
Naturalists Fritz and Hermann Müller hypothesised that heteranthery often leads to a division of labour into 'feeding' and 'pollinating' stamens; the latter often being as long as the pistil so as to promote successful pollination on the bees' back. In many buzz-pollinated species of Senna, however, the so-called pollinating stamens are short and do not level with the stigma, raising the question of how pollen is shed on the bees' back. Here we explore a mechanism called "ricochet pollination". We test whether division of labour is achieved through the interaction between short lower stamens and strongly concave "deflector petals"...
July 27, 2017: Plant Biology
https://www.readbyqxmd.com/read/28740210/elucidating-the-mechanisms-underlying-the-beneficial-health-effects-of-dietary-pollen-on-honey-bees-apis-mellifera-infested-by-varroa-mite-ectoparasites
#6
Desiderato Annoscia, Virginia Zanni, David Galbraith, Anna Quirici, Christina Grozinger, Renzo Bortolomeazzi, Francesco Nazzi
Parasites and pathogens of the honey bee (Apis mellifera) are key factors underlying colony losses, which are threatening the beekeeping industry and agriculture as a whole. To control the spread and development of pathogen infections within the colony, honey bees use plant resins with antibiotic activity, but little is known about the properties of other substances, that are mainly used as a foodstuff, for controlling possible diseases both at the individual and colony level. In this study, we tested the hypothesis that pollen is beneficial for honey bees challenged with the parasitic mite Varroa destructor associated to the Deformed Wing Virus...
July 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28738207/translocation-of-heavy-metals-from-soils-into-floral-organs-and-rewards-of-cucurbita-pepo-implications-for-plant-reproductive-fitness
#7
Erna Xun, Yanwen Zhang, Jimin Zhao, Jixun Guo
Metals and metalloids in soil could be transferred into reproductive organs and floral rewards of hyperaccumulator plants and influence their reproductive success, yet little is known whether non-hyperaccumulator plants can translocate heavy metals from soil into their floral organs and rewards (i.e., nectar and pollen) and, if so, whether plant reproduction will be affected. In our studies, summer squash (Cucurbita pepo L. cv. Golden Apple) was exposed to heavy-metal treatments during bud stage to investigate the translocation of soil-supplemented zinc, copper, nickel and lead into its floral organs (pistil, anther and nectary) and rewards (nectar and pollen) as well as floral metal accumulation effects on its reproduction...
July 21, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28737913/uplc-q-exactive-orbitrap-ms-based-lipidomics-approach-to-characterize-lipid-extracts-from-bee-pollen-and-their-in-vitro-anti-inflammatory-properties
#8
Qiangqiang Li, Xinwen Liang, Liang Zhao, Zhongyin Zhang, Xiaofeng Xue, Kai Wang, Liming Wu
Bee pollen (BP) is collected by honeybees from flower pollen mixed with nectar and its secretions with extensive nutritional and therapeutic properties. Lipids are known to be critical contributors for the therapeutic effects of BP and vary depending on different plant sources; however, lipid profiles of BP are not available. Here, an UPLC-Q-Exactive Orbitrap/MS method was established for comprehensive lipidomics analysis of BP derived from three major nectar plants (Brassica campestris L., Camellia sinensis L...
August 16, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28732430/bee-pollen-flavonoids-as-a-therapeutic-agent-in-allergic-and-immunological-disorders
#9
Masoomeh Jannesar, Maryam Sharif Shoushtari, Ahmad Majd, Zahra Pourpak
Bee pollen grains, as the male reproductive part of seed-bearing plants contain considerable concentrations of various phytochemicals and nutrients. Since antiquity, people throughout the world used pollens to cure colds, flu, ulcers, premature aging, anemia and colitis. It is now well-documented that some bee pollen secondary metabolites (e.g. flavonoid) may have positive health effects. In recent years, the flavonoids have attracted much interest because of their wide range of biological properties and their beneficial effects on human health...
June 2017: Iranian Journal of Allergy, Asthma, and Immunology
https://www.readbyqxmd.com/read/28723912/ginger-and-the-beetle-evidence-of-primitive-pollination-system-in-a-himalayan-endemic-alpine-ginger-roscoea-alpina-zingiberaceae
#10
Babu Ram Paudel, Mani Shrestha, Adrian G Dyer, Qing-Jun Li
The Himalayan endemic alpine genus Roscoea, like other members of ginger family, exhibits the combination of floral traits that would fit pollination by long distant foragers such as bees, birds or flies. We studied the pollination biology of Roscoea alpina, observed potential floral visitors and determined their foraging behaviour, visitation frequency and pollination efficiency, to seek evidence in support of the pollination syndrome hypothesis. We also measured the floral spectra of R. alpina flowers to evaluate if signals fit with the currently known framework for observed floral visitors...
2017: PloS One
https://www.readbyqxmd.com/read/28701955/therapeutic-properties-of-bioactive-compounds-from-different-honeybee-products
#11
REVIEW
Laura Cornara, Marco Biagi, Jianbo Xiao, Bruno Burlando
Honeybees produce honey, royal jelly, propolis, bee venom, bee pollen, and beeswax, which potentially benefit to humans due to the bioactives in them. Clinical standardization of these products is hindered by chemical variability depending on honeybee and botanical sources, but different molecules have been isolated and pharmacologically characterized. Major honey bioactives include phenolics, methylglyoxal, royal jelly proteins (MRJPs), and oligosaccharides. In royal jelly there are antimicrobial jelleins and royalisin peptides, MRJPs, and hydroxy-decenoic acid derivatives, notably 10-hydroxy-2-decenoic acid (10-HDA), with antimicrobial, anti-inflammatory, immunomodulatory, neuromodulatory, metabolic syndrome preventing, and anti-aging activities...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28701074/pyrrolizidine-alkaloids-in-floral-honeys-of-tropical-ghana-and-health-risk-assessment
#12
Emmanuel Letsyo, Gerold Jerz, Peter Winterhalter, Arne Dübecke, Werner von der Ohe, Katharina von der Ohe, Till Beuerle
There is a vast amount of information about the nutritional and medicinal properties of honey as a result of its numerous benefits. However, honeys have been found to be contaminated with hepatotoxic and carcinogenic pyrrolizidine alkaloids (PAs) on account of bees foraging on PA containing plants. This study deals with the analysis of PAs in tropical honeys emanating from different agro-ecological zones of Ghana in order to assess its potential health risk. PAs of 48 honey samples were analysed using HPLC-ESI-MS/MS...
July 13, 2017: Food Additives & Contaminants. Part B, Surveillance
https://www.readbyqxmd.com/read/28698790/sequential-stamen-maturation-and-movement-in-a-protandrous-herb-mechanisms-increasing-pollination-efficiency-and-reducing-sexual-interference
#13
Chang-Long Xiao, Hui Deng, Gan-Ju Xiang, Kadiori Edwin Luguba, You-Hao Guo, Chun-Feng Yang
Successive stamen movement directly controls pollen presentation schedules through sequential stamen maturation and changes the extent of herkogamy by altering the positions of sexual organs. However, the implications of such movements in terms of pollination are not well understood. Pollen presentation theory predicts that staggered pollen presentation should be favoured when plants are subject to diminishing returns on pollen transfer. Herkogamy on the other hand, has been interpreted as an adaptive trait that reduces sexual interference in hermaphrodite flowers...
May 2017: AoB Plants
https://www.readbyqxmd.com/read/28690934/studying-plant-pollinator-interactions-facing-climate-change-and-changing-environments
#14
Diane L Byers, Shu-Mei Chang
Plant-pollinator interactions are essential for successful plant reproduction in both natural and agricultural systems. These interactions are negatively impacted by recent large-scale alterations of the environments, particularly climate change. The responses of plants and pollinators to changing abiotic conditions that vary seasonally and geographically are often uncoordinated, potentially leading to the breakdown of this interaction. The complexity of the responses of plants and pollinators to our changing climate necessitates creative approaches...
June 2017: Applications in Plant Sciences
https://www.readbyqxmd.com/read/28690929/applying-pollen-dna-metabarcoding-to-the-study-of-plant-pollinator-interactions
#15
Karen L Bell, Julie Fowler, Kevin S Burgess, Emily K Dobbs, David Gruenewald, Brice Lawley, Connor Morozumi, Berry J Brosi
PREMISE OF THE STUDY: To study pollination networks in a changing environment, we need accurate, high-throughput methods. Previous studies have shown that more highly resolved networks can be constructed by studying pollen loads taken from bees, relative to field observations. DNA metabarcoding potentially allows for faster and finer-scale taxonomic resolution of pollen compared to traditional approaches (e.g., light microscopy), but has not been applied to pollination networks. METHODS: We sampled pollen from 38 bee species collected in Florida from sites differing in forest management...
June 2017: Applications in Plant Sciences
https://www.readbyqxmd.com/read/28688300/herbicide-and-insect-resistant-bt-cotton-pollen-assessment-finds-no-detrimental-effects-on-adult-honey-bees
#16
Lin Niu, Weihua Ma, Chaoliang Lei, Juan Luis Jurat-Fuentes, Lizhen Chen
One important concern regarding the use of transgenic cotton expressing insecticidal toxins from the bacterium Bacillus thuringiensis (Bt) is its potential detrimental effect on non-target organisms. The honey bee (Apis mellifera) is the most important pollinator species worldwide and it is directly exposed to transgenic crops by the consumption of genetically modified (GM) pollen. However, the potential effects of Bt cotton on A. mellifera remain unclear. In the present study, we assessed the effects of two Bt cotton varieties; ZMSJ expressing the Cry1Ac and Cry2Ab insecticidal proteins, and ZMKCKC producing Cry1Ac and EPSPS, on A...
July 5, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28679151/non-target-evaluation-of-contaminants-in-honey-bees-and-pollen-samples-by-gas-chromatography-time-of-flight-mass-spectrometry
#17
E Hakme, A Lozano, M M Gómez-Ramos, M D Hernando, A R Fernández-Alba
This work presents a non-targeted screening approach for the detection and quantitation of contaminants in bees and pollen, collected from the same hive, by GC-EI-ToF-MS. It consists of a spectral library datasets search using a compound database followed by a manual investigation and analytical standard confirmation together with semi-quantitation purposes. Over 20% of the compounds found automatically by the library search could not be confirmed manually. This number of false positive detections was mainly a consequence of an inadequate ion ratio criterion (±30%), not considered in the automatic searching procedure...
October 2017: Chemosphere
https://www.readbyqxmd.com/read/28665769/lack-of-evidence-for-microplastic-contamination-in-honey
#18
Peter Mühlschlegel, Armin Hauk, Ulrich Walter, Robert Sieber
Honey samples from Switzerland were investigated with regard to their microplastic particle burden. Five representative honey samples of different origin were processed following a standardized protocol to separate plastic-based microparticles from particles of natural origin, such as pollen, propolis, wax, and bee-related debris. The procedure was optimized to minimize post-sampling microplastic cross-contamination in the laboratory. The isolated microplastic particles were characterized and grouped by means of light microscopy as well as chemically characterized by microscopically coupled Raman and Fourier transform infrared spectroscopy...
July 10, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28663709/comparative-study-on-the-dynamics-and-performances-of-apis-mellifera-jemenitica-and-imported-hybrid-honeybee-colonies-in-southwestern-saudi-arabia
#19
Ahmad A Al-Ghamdi, Nuru Adgaba, Yilma Tadesse, Awraris Getachew, Anwer A Al-Maktary
The aims of this study were to assess the seasonal population dynamics and evaluate the performance of Apis mellifera jemenitica (local bee) and introduced hybrid honeybee colonies in the lowlands and highlands of southwestern Saudi Arabia. Data regarding the performance and population dynamics parameters such as brood and adult bee population, amounts of stored pollen and nectar were gathered from the two races (25 colonies of each) for one year (April 2013 through March 2014), and statistically tested. The results indicated that at low lands, local bee colonies maintained relatively high brood and adult bee populations (P < 0...
July 2017: Saudi Journal of Biological Sciences
https://www.readbyqxmd.com/read/28663704/food-for-honeybees-pollinators-and-seed-set-of-anthyllis-barba-jovis-l-fabaceae-in-arid-coastal-areas-of-the-mediterranean-basin
#20
Giovanni Benelli, Stefano Benvenuti, Pier Luigi Scaramozzino, Angelo Canale
Abundance and diversity of insect pollinators are declining in many ecosystems worldwide. The abundance and diversity of wild and managed bees are related to the availability of continuous floral resources. In particular, in Mediterranean basin countries, the presence of wildflower spots enhances the establishment of social Apoidea, since coastal regions are usually characterized by pollen and nectar shortage in early spring and late summer. Anthyllis barba-jovis produces both nectar and pollen as important food source for bees helping them to overcome early spring period food shortage...
July 2017: Saudi Journal of Biological Sciences
keyword
keyword
48421
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"