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https://www.readbyqxmd.com/read/28727909/positive-allergen-reaction-in-allergic-and-nonallergic-rhinitis-a-systematic-review
#1
Aneeza W Hamizan, Janet Rimmer, Raquel Alvarado, William A Sewell, Larry Kalish, Raymond Sacks, Richard J Harvey
BACKGROUND: The diagnosis of allergic rhinitis (AR) is based on cutaneous and serological assessment to determine immunoglobulin E (IgE)-mediated disease. However, discrepancies between these tests and nasal provocation exist. Patients diagnosed as non-allergic rhinitis (NAR) but with positive nasal allergen provocation test (NAPT) may represent a local allergic condition or entopy, still suitable to allergy interventions. The objective of this study was to determine the frequency of nasal reactivity toward allergens among AR and NAR patients, and to describe the diagnostic characteristics of NAPT methodologies...
July 20, 2017: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/28724956/mapping-resistance-responses-to-sclerotinia-infestation-in-introgression-lines-of-brassica-juncea-carrying-genomic-segments-from-wild-brassicaceae-b-fruticulosa
#2
Kusum Rana, Chhaya Atri, Mehak Gupta, Javed Akhatar, Prabhjodh S Sandhu, Nitin Kumar, Ravinder Jaswal, Martin J Barbetti, Surinder S Banga
Sclerotinia stem rot (Sclerotinia sclerotiorum) is a major disease of Brassica oilseeds. As suitable donors to develop resistant cultivars are not available in crop Brassicas, we introgressed resistance from a wild Brassicaceae species, B. fruticulosa. We produced 206 B. juncea-B. fruticulosa introgression lines (ILs). These were assessed for pollen grain fertility, genome size variations and resistance responses to Sclerotinia following stem inoculations under disease-conducive conditions. Of these, 115 ILs showing normal fertility and genome size were selected for cytogenetic characterization using florescent genomic in situ hybridization (Fl-GISH)...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28724730/stacked-bt-maize-and-arthropod-predators-exposure-to-insecticidal-cry-proteins-and-potential-hazards
#3
Zdeňka Svobodová, Yinghua Shu, Oxana Skoková Habuštová, Jörg Romeis, Michael Meissle
Genetically engineered (GE) crops with stacked insecticidal traits expose arthropods to multiple Cry proteins from Bacillus thuringiensis (Bt). One concern is that the different Cry proteins may interact and lead to unexpected adverse effects on non-target species. Bi- and tri-trophic experiments with SmartStax maize, herbivorous spider mites (Tetranychus urticae), aphids (Rhopalosiphum padi), predatory spiders (Phylloneta impressa), ladybeetles (Harmonia axyridis) and lacewings (Chrysoperla carnea) were conducted...
July 26, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28724622/transcription-factor-myb26-is-key-to-spatial-specificity-in-anther-secondary-thickening-formation
#4
Caiyun Yang, Jie Song, Alison Ferguson, Doris Klisch, Kim Simpson, Rui Mo, Benjamin Taylor, Zoe A Wilson
Successful fertilisation relies on the production and effective release of viable pollen. Failure of anther opening (dehiscence), results in male sterility although the pollen may be fully functional. MYB26 regulates the formation of secondary thickening in the anther endothecium, which is critical for anther dehiscence and fertility. Here we show that the although the MYB26 transcript shows expression in multiple floral organs the MYB26 protein is localised specifically to the anther endothecium nuclei and that it directly regulates two NAC domain genes, NST1 and NST2, which are critical for the induction of secondary thickening biosynthesis genes...
July 19, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28724621/mildew-resistance-locus-function-in-pollen-ovary-reception-is-linked-to-its-oligomerization-and-subcellular
#5
Daniel S Jones, Jing Yuan, Benjamin Smith, Andrew Willoughby, Emily L Kumimoto, Sharon A Kessler
Sexual reproduction in flowering plants requires communication between synergid cells and a tip-elongating pollen tube (PT) for the successful delivery of sperm cells to the embryo sac. The reception of the PT relies on signaling within the synergid cell that ultimately leads to the degeneration of the receptive synergid and PT rupture, releasing the sperm cells for double fertilization. In Arabidopsis thaliana, NORTIA (NTA), a member of the Mildew resistance locus O (MLO) family of proteins, plays a critical role in the communication processes regulating PT reception...
July 19, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28724074/high-resolution-genetic-and-physical-mapping-of-the-eastern-filbert-blight-resistance-region-in-jefferson-hazelnut-corylus-avellana-l
#6
Vidyasagar Sathuvalli, Shawn A Mehlenbacher, David C Smith
Eastern filbert blight (EFB), caused by the pyrenomycete (Peck) E. Müller, is a devastating disease of European hazelnut ( L) in the US Pacific Northwest. A dominant allele at a single locus from the obsolete pollenizer 'Gasaway' confers a high level of resistance to EFB. To identify the gene responsible for resistance, we initiated map-based cloning efforts in a population of 1488 seedlings that segregated for resistance. Chromosome walking was initiated using primers designed from eight previously identified random amplified polymorphic DNA markers linked to resistance...
July 2017: Plant Genome
https://www.readbyqxmd.com/read/28723912/ginger-and-the-beetle-evidence-of-primitive-pollination-system-in-a-himalayan-endemic-alpine-ginger-roscoea-alpina-zingiberaceae
#7
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/28722254/determination-of-irritant-threshold-concentrations-of-multiple-tree-grass-weed-and-mould-allergens-for-intradermal-testing-of-horses-residing-in-the-southern-usa
#8
Martha J Lane, Cherie M Pucheu-Haston, Michael T Kearney, Michelle Woodward
BACKGROUND: Appropriate allergen threshold concentrations (TCs) for intradermal testing (IDT) have not been established in horses for many pollen and mould allergens. OBJECTIVES: To determine the TCs in non-allergic horses and describe the frequency of late phase reactions for 26 allergens, including trees, grasses, weeds and moulds in horses residing in the southern Unites States. ANIMALS: Twenty four clinically normal horses in the southern United States...
July 18, 2017: Veterinary Dermatology
https://www.readbyqxmd.com/read/28722149/masting-in-wind-pollinated-trees-system-specific-roles-of-weather-and-pollination-dynamics-in-driving-seed-production
#9
Michał Bogdziewicz, Jakub Szymkowiak, Idalia Kasprzyk, Łukasz Grewling, Zbigniew Borowski, Katarzyna Borycka, Władysław Kantorowicz, Dorota Myszkowska, Katarzyna Piotrowicz, Monika Ziemianin, Mario B Pesendorfer
Masting, the highly variable production of synchronized large seed crops, is a common reproductive strategy in plant populations. In wind-pollinated trees, flowering and pollination dynamics are hypothesized to provide the mechanistic link for the well-known relationship between weather and population-level seed production. Several hypotheses make predictions about the effect of weather on annual pollination success. The pollen coupling hypothesis predicts that weather and plant resources drive the flowering effort of trees which directly translates into the size of seed crops through efficient pollination...
July 19, 2017: Ecology
https://www.readbyqxmd.com/read/28722132/evolution-of-the-selfing-syndrome-anther-orientation-and-herkogamy-together-determine-reproductive-assurance-in-a-self-compatible-plant
#10
Per Toräng, Linus Vikström, Jörg Wunder, Stefan Wötzel, George Coupland, Jon Ågren
Capacity for autonomous self-fertilization provides reproductive assurance, has evolved repeatedly in the plant kingdom, and typically involves several changes in flower morphology and development (the selfing syndrome). Yet, the relative importance of different traits and trait combinations for efficient selfing and reproductive success in pollinator-poor environments is poorly known. In a series of experiments, we tested the importance of anther-stigma distance and the less studied trait anther orientation for efficiency of selfing in the perennial herb Arabis alpina...
July 19, 2017: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/28721521/expression-patterns-of-the-native-shrunken-2-promoter-in-sorghum-bicolor-visualised-through-use-of-the-gfp-reporter-gene
#11
Kyle C Lamont, Stephen R Mudge, Guoquan Liu, Ian D Godwin
The AGPase large subunit (shrunken-2) promoter was demonstrated to be active in the placentochalaza and endosperm of developing grain as well as the root tips in transgenic sorghum. The temporal and spatial expression patterns of the Sorghum bicolor Shrunken-2 (Sh2) promoter were evaluated using the green fluorescence protein reporter gene (gfp) in transgenic sorghum, within the context of upregulating starch biosynthesis in the developing grain. GFP fluorescence was analysed throughout development in various tissue types using confocal laser scanning microscopy techniques...
July 18, 2017: Plant Cell Reports
https://www.readbyqxmd.com/read/28719626/impact-of-respiratory-infections-outdoor-pollen-and-socioeconomic-status-on-associations-between-air-pollutants-and-pediatric-asthma-hospital-admissions
#12
Julie E Goodman, Christine T Loftus, Xiaobin Liu, Ke Zu
BACKGROUND: Epidemiology studies have shown that ambient concentrations of ozone and fine particulate matter (PM2.5) are associated with increased emergency department (ED) visits and hospital admissions (HAs) for asthma. OBJECTIVE: Evaluate the impact of outdoor pollen, respiratory infections, and socioeconomic status (SES) on the associations between ambient ozone and PM2.5 and asthma HAs in New York City. METHODS: Daily ozone, PM2.5, meteorological factors, pollen, and hospitalization records during 1999 to 2009 were obtained for New York City residents...
2017: PloS One
https://www.readbyqxmd.com/read/28718953/computational-validation-of-the-recently-proposed-pollen-season-definition-criteria
#13
K Karatzas, M Riga, U Berger, M Werchan, O Pfaar, K Ch Bergmann
In a recently published paper (Pfaar et al., 2016), a Task Force of the Immunotherapy and Aerobiology and Pollution Interest Groups of the EAACI suggested specific criteria for the definition of pollen exposure times for three types of pollen events: (a) Pollen Season (PS) start and end, (b) high pollen season (or Peak Pollen Period-PPP) start and end, and (c) high pollen days. Species addressed included Birch, Grasses, Cypress, Olive, and Ragweed. Two important questions arise from the aforementioned definitions: (i) do they lead to a narrow (thus well defined) time interval identifying start and end event dates (robustness of the criteria) and (ii) if slightly altered, will they result to a narrow (thus again well defined) fluctuation of start and end event dates (sensitivity of the criteria)? In an effort to provide with responses to aforementioned questions, we analyzed Poaceae pollen count data coming from Germany (up to 40 pollen monitoring stations, years 2012-2016)...
July 18, 2017: Allergy
https://www.readbyqxmd.com/read/28717440/stigmatic-limitations-on-reproductive-success-in-a-paleotropical-tree-causes-and-consequences
#14
Madhu Raina, Raman Kumar, Veenu Kaul
Success in reproduction is subject to the successful initiation as well as successful completion of a chain of consecutive events starting from flower formation and ending with viable seed production. A pivotal role in this chain is played by the stigma which is the seat of pollen recognition and initiation of pollen-pistil interaction. An interesting feature of the family Bignoniaceae is the presence of thigmosensitive stigmas which open, close and re-open in response to touch. Kigelia pinnata bears a touch sensitive stigma and is a low fruit setter in Jammu and Kashmir (India)...
July 2017: AoB Plants
https://www.readbyqxmd.com/read/28716746/controlled-release-and-anti-proliferative-effect-of-imatinib-mesylate-loaded-sporopollenin-microcapsules-extracted-from-pollens-of-betula-pendula
#15
Idris Sargin, Lalehan Akyuz, Murat Kaya, Gamze Tan, Talip Ceter, Kevser Yildirim, Seymanur Ertosun, Gozde Hatun Aydin, Muge Topal
Sporopollenin is a promising material for drug encapsulation due to its excellent properties; uniformity in size, non-toxicity, chemically and thermally resilient nature. Herein, morphologically intact sporopollenin microcapsules were extracted from Betula pendula pollens. Cancer therapeutic agent (imatinib mesylate) was loaded into the microcapsules. The encapsulation efficiency by passive loading technique was found to be 21.46%. Release behaviour of the drug from microcapsules was found to be biphasic, with an initial fast release followed by a slower rate of release...
July 14, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28716406/the-tomato-b-type-cyclin-gene-slcycb2-plays-key-roles-in-reproductive-organ-development-trichome-initiation-terpenoids-biosynthesis-and-prodenia-litura-defense
#16
Shenghua Gao, Yanna Gao, Cheng Xiong, Gang Yu, Jiang Chang, Qihong Yang, Changxian Yang, Zhibiao Ye
Cyclins exist extensively in various plant species. Among them, B-type cyclins play important roles in the transition of G2-to-M. However, few B-type cyclins have been reported to participate in reproductive organ development and trichome formation. In this study, transgene analysis showed that SlCycB2 overexpression caused abnormal flower with the unclosed stamen, shortened style and aberrant pollen. In addition, nearly all non-glandular trichomes, as well as the glandular ones were disappeared. On the contrary, suppression of SlCycB2 could promote type III and type V trichomes formation...
September 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28713519/common-solvents-for-making-extraction-of-allergenic-proteins-from-plants-pollens-for-prick-tests-and-related-factors-a-technical-review
#17
REVIEW
Hassan Mansouritorghabeh, Farahzad Jabbari-Azad, Abdolreza Varasteh, Mojtaba Sankian, Reza Farid-Hosseini
Collecting information on influencing factors in developing consistent and high-quality extracts results in accurate diagnosis and effective treatment of type I allergy (IgE mediated). Furthermore, considering that a large number of allergens are currently in practice, any attempt to develop a more effective procedure for preparing extract may be useful. Nowadays, different saline solvents, temperature, incubation time, and PH are being incorporated for preparing allergen extracts. The objective of the current study was to clear and address the commonest of solvent buffers and allied conditions for making extracts of pollens of grasses, trees, and weeds...
May 2017: Electronic Physician
https://www.readbyqxmd.com/read/28713403/time-dependent-trapping-of-pollinators-driven-by-the-alignment-of-floral-phenology-with-insect-circadian-rhythms
#18
Jenny Y Y Lau, Xing Guo, Chun-Chiu Pang, Chin Cheung Tang, Daniel C Thomas, Richard M K Saunders
Several evolutionary lineages in the early divergent angiosperm family Annonaceae possess flowers with a distinctive pollinator trapping mechanism, in which floral phenological events are very precisely timed in relation with pollinator activity patterns. This contrasts with previously described angiosperm pollinator traps, which predominantly function as pitfall traps. We assess the circadian rhythms of pollinators independently of their interactions with flowers, and correlate these data with detailed assessments of floral phenology...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28712406/-increased-expressions-of-substance-p-and-neurokinin-tachykinin-receptor-1-in-eosinophils-of-patients-with-psoriasis
#19
Zhe Zuo, Junling Wang, Huiyun Zhang, Wenjiao Zheng, Zenan Zhang, Shaoheng He
Objective To investigate the expressions of substance P (SP) and its receptor neurokinin/tachykinin receptor 1 (NK1R) in peripheral blood eosinophils of patients with psoriasis. Methods The levels of SP and NK1R in the peripheral blood of both patients with psoriasis and healthy people were detected by flow cytometry. This method was again used to detect the levels of SP and NK1R in the peripheral blood eosinophils of patients with psoriasis after stimulated with the crude extracts of Artemisia pollen, dust mite and Platanus pollen (all at concentrations of 0...
July 2017: Xi Bao Yu Fen Zi Mian Yi Xue za Zhi, Chinese Journal of Cellular and Molecular Immunology
https://www.readbyqxmd.com/read/28711500/atvps11-is-essential-for-vacuole-biogenesis-in-embryo-and-participates-in-pollen-tube-growth-in-arabidopsis
#20
Xiaoyun Tan, Juan Wei, Beibei Li, Mengru Wang, Yiqun Bao
Vacuoles are multiple functional and essential organelles in plants. Studies in Saccharomyces cerevisiae had identified a tethering factor HOPS (Homotypic Fusion and Vacuolar Protein Sorting) complex that plays a critical role in vacuole biogenesis. The HOPS complex consists of four core subunits (Vps11, Vps16, Vps18 and Vps33) and two special subunits (Vps39 and Vps41). All these subunits were found in Arabidopsis, and our knowledge of the function of Arabidopsis HOPS complex are still limited. In this study, we investigated the function of AtVps11 gene in Arabidopsis, we found that vps11/- lead to embryo lethal, vacuole biogenesis in embryo was impaired...
July 12, 2017: Biochemical and Biophysical Research Communications
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