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https://www.readbyqxmd.com/read/29346506/small-and-surrounded-population-size-and-land-use-intensity-interact-to-determine-reliance-on-autonomous-selfing-in-a-monocarpic-plant
#1
Rachel B Spigler
Background and Aims: Habitat fragmentation has transformed landscapes globally, leaving remnants embedded within a complex matrix that is rapidly becoming more developed. For many plant populations, the associated factors of decreased size and intensification of land use surrounding them are expected to increase pollen limitation ('PL'), unless autonomous self-pollination provides reproductive assurance ('RA'). Decreased pollinator visitation is often assumed to drive these patterns, but other, less studied mechanisms might include increased heterospecific pollen transfer or decreased conspecific pollen availability via florivory...
January 15, 2018: Annals of Botany
https://www.readbyqxmd.com/read/29346453/yearly-fluctuations-of-flower-landscape-in-a-mediterranean-scrubland-consequences-for-floral-resource-availability
#2
Víctor Flo, Jordi Bosch, Xavier Arnan, Clara Primante, Ana M Martín González, Helena Barril-Graells, Anselm Rodrigo
Species flower production and flowering phenology vary from year to year due to extrinsic factors. Inter-annual variability in flowering patterns may have important consequences for attractiveness to pollinators, and ultimately, plant reproductive output. To understand the consequences of flowering pattern variability, a community approach is necessary because pollinator flower choice is highly dependent on flower context. Our objectives were: 1) To quantify yearly variability in flower density and phenology; 2) To evaluate whether changes in flowering patterns result in significant changes in pollen/nectar composition...
2018: PloS One
https://www.readbyqxmd.com/read/29343309/could-seasonal-allergy-be-a-risk-factor-for-acute-rhinosinusitis-in-children
#3
G Leo, C Incorvaia, A Cazzavillan, D Consonni, G V Zuccotti
OBJECTIVE: To evaluate the incidence of acute rhinosinusitis in children with grass pollen induced rhinitis during the period of grass pollinosis. METHODS: Children with nasal symptoms from grass pollen induced rhinitis but without rhinosinusitis symptoms were selected. Their parents were asked to complete a diary during pollen exposure to report nasal symptoms and drugs used daily. When rhinosinusitis was suspected, the confirmatory diagnosis of acute rhinosinusitis was made by fibro-endoscopy...
January 18, 2018: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/29339970/a-new-image-based-tool-for-the-high-throughput-phenotyping-of-pollen-viability-evaluation-of-inter-and-intra-cultivar-diversity-in-grapevine
#4
Javier Tello, María Ignacia Montemayor, Astrid Forneck, Javier Ibáñez
Background: Low pollen viability may limit grapevine yield under certain conditions, causing relevant economic losses to grape-growers. It is usually evaluated by the quantification of the number of viable and non-viable pollen grains that are present in a sample after an adequate pollen grain staining procedure. Although the manual counting of both types of grains is the simplest and most sensitive approach, it is a laborious and time-demanding process. In this regard, novel image-based approaches can assist in the objective, accurate and cost-effective phenotyping of this trait...
2018: Plant Methods
https://www.readbyqxmd.com/read/29339129/systemic-reactions-in-pediatric-patients-receiving-standardized-allergen-subcutaneous-immunotherapy-with-and-without-seasonal-dose%C3%A2-adjustment
#5
Sultan Albuhairi, Tatyana Sare, Paul Lakin, Kristel El Khoury, Elena Crestani, Lynda C Schneider, Rocco Anzaldi, Al Patterson, Rima Rachid
BACKGROUND: The 2003 Joint Task Force on Practice Parameters recommended standardizing allergen subcutaneous immunotherapy (SCIT). Data from longitudinal surveillance survey in North America reported a systemic reaction (SR) rate of 0.1% to 0.2% of injection visits. The rate of SR to standardized SCIT in pediatric patients has not been well evaluated. OBJECTIVE: The objective of this study was to evaluate the rate of SRs to standardized SCIT in pediatric patients aged 5 to 18 years in a single tertiary care center in the United States...
January 12, 2018: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/29338961/is-eosinophilic-esophagitis-an-equivalent-of-pollen-allergic-asthma-analysis-of-biopsies-and-therapy-guided-by-component-resolved-diagnosis
#6
A Armentia, S Martín-Armentia, B Martín-Armentia, J Santos-Fernández, R Álvarez, B Madrigal, D Fernández-González, S Gayoso, M J Gayoso
BACKGROUND: Eosinophilic esophagitis (EoE) is characterized by esophageal dysfunction and, histologically, by eosinophilic inflammation. There is not a clear etiologic treatment. Biopsies analysis using plant histology methods may show callose and pollen tubes in the esophageal mucosa. Component-resolved diagnosis (CRD) with microarrays could detect possible allergens involved and indicate an elimination diet and allergen immunotherapy (AIT). METHODS: One hundred and twenty-nine patients with EoE were tested for environmental and food allergens...
January 12, 2018: Allergologia et Immunopathologia
https://www.readbyqxmd.com/read/29337913/proteomic-analysis-and-identification-of-possible-allergenic-proteins-in-mature-pollen-of-populus-tomentosa
#7
Liuqiang Wang, Xiaoling Zhang, Jin Zhang, Wei Fan, Mengzhu Lu, Jianjun Hu
Pollen grains from Populus tomentosa, a widely cultivated tree in northern area of China, are considered to be an important aeroallergen causing severe allergic diseases. To gain insight into their allergenic components, mature Populus tomentosa pollen proteins were analyzed by two-dimensional gel electrophoresis (2-DE) and matrix-assisted laser desorption/ionization-time of flight mass spectrometry (MALDI-TOF/TOF MS). A total of 412 spots from mature pollen were resolved on pH 4-7 immobilized pH gradient (IPG) strips and 159 distinct proteins were identified from 242 spots analyzed...
January 16, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29336286/oral-allergy-syndrome
#8
Nuray Bayar Muluk, Cemal Cingi
OBJECTIVES: To review oral allergy syndrome (OAS). METHODS: We searched several medical literature data bases with the following key words: "oral allergy syndrome," "OAS," "pollen-food allergy syndrome," "PFAS," "allergy," "diagnosis," "treatment." RESULTS: Oral allergy syndrome (OAS), also called "pollen-food allergy syndrome," is a type of food allergy brought about by flavors, nuts, raw fruit, and vegetables. The most well-known symptoms are mouth and throat itching, which starts rapidly after a food is placed in the mouth, and that, as a rule, continues for just a couple of minutes after the food has been swallowed...
January 1, 2018: American Journal of Rhinology & Allergy
https://www.readbyqxmd.com/read/29336039/pollen-germination-and-in-vivo-fertilization-in-response-to-high-temperature-during-flowering-in-hybrid-and-inbred-rice
#9
Wanju Shi, Xiang Li, Ralf C Schmidt, Paul C Struik, Xinyou Yin, S V Krishna Jagadish
High temperature during flowering in rice causes spikelet sterility and is a major threat to rice productivity in tropical and subtropical regions, where hybrid rice development is increasingly contributing to sustain food security. However, the sensitivity of hybrids to increasing temperature and physiological responses in terms of dynamic fertilization processes are unknown. To address these questions, several promising hybrids and inbreds were exposed to control and high day-time temperature (HDT) in Experiment 1 and hybrids having contrasting heat tolerance were selected for Experiment 2 for further physiological investigation under high day and night temperature treatments...
January 15, 2018: Plant, Cell & Environment
https://www.readbyqxmd.com/read/29335544/transposon-derived-small-rnas-triggered-by-mir845-mediate-genome-dosage-response-in-arabidopsis
#10
Filipe Borges, Jean-Sébastien Parent, Frédéric van Ex, Philip Wolff, German Martínez, Claudia Köhler, Robert A Martienssen
Chromosome dosage has substantial effects on reproductive isolation and speciation in both plants and animals, but the underlying mechanisms are largely obscure 1 . Transposable elements in animals can regulate hybridity through maternal small RNA 2 , whereas small RNAs in plants have been postulated to regulate dosage response via neighboring imprinted genes3,4. Here we show that a highly conserved microRNA in plants, miR845, targets the tRNAMet primer-binding site (PBS) of long terminal repeat (LTR) retrotransposons in Arabidopsis pollen, and triggers the accumulation of 21-22-nucleotide (nt) small RNAs in a dose-dependent fashion via RNA polymerase IV...
January 15, 2018: Nature Genetics
https://www.readbyqxmd.com/read/29335417/europe-s-lost-forests-a-pollen-based-synthesis-for-the-last-11-000-years
#11
N Roberts, R M Fyfe, J Woodbridge, M-J Gaillard, B A S Davis, J O Kaplan, L Marquer, F Mazier, A B Nielsen, S Sugita, A-K Trondman, M Leydet
8000 years ago, prior to Neolithic agriculture, Europe was mostly a wooded continent. Since then, its forest cover has been progressively fragmented, so that today it covers less than half of Europe's land area, in many cases having been cleared to make way for fields and pasture-land. Establishing the origin of Europe's current, more open land-cover mosaic requires a long-term perspective, for which pollen analysis offers a key tool. In this study we utilise and compare three numerical approaches to transforming pollen data into past forest cover, drawing on >1000 14C-dated site records...
January 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29332927/the-response-of-common-marmoset-immunity-against-cedar-pollen-extract
#12
Yuko Yamada, Shuji Takabayashi, Hideki Kato, Kenji Ishiwata, Naohiro Watanabe, Erika Sasaki, Sonoko Habu
The in vivo model of pollinosis has been established using rodents, but the model cannot completely mimic human pollinosis. We used Callithrix jacchus, the common marmoset (CM), to establish a pollinosis animal model using intranasal weekly administration of cedar pollen extract with cholera toxin adjuvant. Some of the treated CMs exhibited the symptoms of snitching, excess nasal mucus and/or sneezing, but the period was very short, and the symptoms disappeared after several weeks. The CD4+CD25+ cell ratio in the peripheral blood increased in CMs quickly after the nasal administration of cedar pollen extract, but the timing was not parallel with the symptoms...
January 15, 2018: Bioscience Trends
https://www.readbyqxmd.com/read/29331087/outdoor-pollen-is-a-trigger-of-child-and-adolescent-asthma-ed-presentations-a-systematic-review-and-meta-analysis
#13
REVIEW
Bircan Erbas, Mitra Jazayeri, Katrina A Lambert, Constance H Katelaris, Luke A Prendergast, Rachel Tham, M Jeannette Parrodi, Janet Davies, Ed Newbigin, Michael J Abramson, Shyamali C Dharmage
BACKGROUND: In the context of increased asthma exacerbations associated with climatic changes such as thunderstorm asthma, interest in establishing the link between pollen exposure and asthma hospital admissions has intensified. Here, we systematically reviewed and performed a meta-analysis of studies on pollen and ED attendance. METHODS: A search for studies with appropriate search strategy in Medline, Embase, Web of Science and CINAHL was conducted. Each study was assessed for quality and risk of bias...
January 13, 2018: Allergy
https://www.readbyqxmd.com/read/29330903/lack-of-correlation-between-pollen-aperture-numbers-and-environmental-factors-in-pansies-viola-l-sect-melanium-ging-pollen-heteromorphism-re-examined
#14
Aneta Słomka, Justyna Żabicka, Lulëzim Shuka, Jerzy Bohdanowicz, Elżbieta Kuta
(1) The research conducted including its rationale. The development of different pollen morphs by one specimen - pollen heteromorphism - occurs in ca. one-third species of the genus Viola. Melanium section species (pansies) stand out to produce the widest range of apertures among Viola species. Aperture number decrease with elevation increase and faster germination of 5-aperturate pollen as compared with 3-aperturate were previously postulated. (2) Central methods applied. We re-examined pollen heteromorphism in the context of its viability, and we made correlations with elevation (>1500 m a...
January 13, 2018: Plant Biology
https://www.readbyqxmd.com/read/29330901/floral-contrivances-and-specialized-pollination-mechanism-confer-strong-influence-to-elicit-mixed-mating-in-wrightia-tomentosa-apocynaceae
#15
Chandan Barman, Vineet Kumar Singh, Sandip Das, Rajesh Tandon
• Reproductive success of a plant species is largely influenced by the outcomes of mating pattern in a population. It is believed that a significantly greater proportion of animal-pollinated plants have evolved a mixed-mating strategy, the extent of which may vary among species. It is thus pertinent to investigate the key contributors of mating success, especially to identify the reproductive constraints in depauperated populations of threatened plant species. • We looked into the contribution of floral architecture, pollination mechanism and breeding system on the extent of outcrossing rate in a near threatened tree species, W...
January 13, 2018: Plant Biology
https://www.readbyqxmd.com/read/29330012/basophil-testing-with-cd63-in-pollen-sensitised-patients-is-independent-of-the-circadian-clock
#16
Cecilie Lind, Søren Helbo Skaarup, Axel Lorentz, Hans Jürgen Hoffmann
No abstract text is available yet for this article.
January 9, 2018: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29327510/zmstk1-and-zmstk2-encoding-receptor-like-cytoplasmic-kinase-are-involved-in-maize-pollen-development-with-additive-effect
#17
Mingxia Fan, Chunyu Zhang, Lei Shi, Chen Liu, Wenjuan Ma, Meiming Chen, Kuichen Liu, Fengchun Cai, Guohong Wang, Zhengyi Wei, Min Jiang, Zaochang Liu, Ansar Javeed, Feng Lin
Pollen germination and pollen tube growth are important physiological processes of sexual reproduction of plants, and also are involved in signal transduction. Our previous study reveals that ZmSTK1 and ZmSTK2 are two receptor-like cytoplasmic kinases (RLCK) homologs in Zea mays as members of receptor-like protein kinase (RLK) subfamily, sharing 86% identity at the amino acid level. Here, we report that ZmSTK1 and ZmSTK2, expressed at late stages of pollen development, regulate maize pollen development with additive effect...
January 11, 2018: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/29327217/cryobiotechnology-of-apple-malus-spp-development-progress-and-future-prospects
#18
REVIEW
Min-Rui Wang, Long Chen, Jaime A Teixeira da Silva, Gayle M Volk, Qiao-Chun Wang
Cryopreservation provides valuable genes for further breeding of elite cultivars, and cryotherapy improves the production of virus-free plants in Malus spp., thus assisting the sustainable development of the apple industry. Apple (Malus spp.) is one of the most economically important temperate fruit crops. Wild Malus genetic resources and existing cultivars provide valuable genes for breeding new elite cultivars and rootstocks through traditional and biotechnological breeding programs. These valuable genes include those resistant to abiotic factors such as drought and salinity, and to biotic factors such as fungi, bacteria and aphids...
January 11, 2018: Plant Cell Reports
https://www.readbyqxmd.com/read/29324841/honey-bee-apis-mellifera-nurses-do-not-consume-pollens-based-on-their-nutritional-quality
#19
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
#20
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
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