نتایج جستجو برای: pollen supply
تعداد نتایج: 178918 فیلتر نتایج به سال:
during past few years, the cupressus arizonica has been abundantly planted in tehran, causing a significant increase of allergic diseases from the middle of winter to the beginning of spring. the aim of this study was the comparison of pollen protein content in two major varieties of c. arizonica planted in tehran, including c. arizonica var. arizonica and c. arizonica var. glabra , in order to...
Citrus species are classified as a sensitive group of trees to salt stress, but the levels of their sensitivity or tolerance to salt are different among cultivars. In order to evaluate the effects of salinity stress on pollen germination of some citrus cultivars, an experiment was performed in factorial, based on completely randomized design in three replications with Cleopatra mandarin (Citrus...
Rice reproductive development is sensitive to high temperature and soil nitrogen supply, both of which are predicted to be increased threats to rice crop yield. Rice spikelet development is a critical process that determines yield, yet little is known about the transcriptional regulation of rice spikelet development in response to the combination of heat stress and low nitrogen availability. He...
Abstract Information on the allergenic pollen season provides insight state of environment a region and facilitates allergy symptom management. We present retrospective analysis duration severity role meteorological factors in Istanbul, Turkey. Aerobiological sampling from January 2013 to June 2016, identification counting followed current standard methodology. Pollen seasons were defined accor...
BACKGROUND Oilseed rape and maize crops represent a large part of agriculture fields in European countries. OBJECTIVE To establish the actual prevalence of sensitization to oilseed rape and maize pollen, and to determine if this is correlated to the amount of exposure as well as to the patient's history of atopy or asymptomatic atopy. METHODS The study was conducted by 69 allergists belongi...
Airborne olive pollen counts are not representative of exposure to the major olive allergen Ole e 1.
Pollen is routinely monitored, but it is unknown whether pollen counts represent allergen exposure. We therefore simultaneously determined olive pollen and Ole e 1 in ambient air in Córdoba, Spain, and Évora, Portugal, using Hirst-type traps for pollen and high-volume cascade impactors for allergen. Pollen from different days released 12-fold different amounts of Ole e 1 per pollen (both locati...
BACKGROUND Pollen are monitored in Europe by a network of about 400 pollen traps, all operated manually. To date, automated pollen monitoring has only been feasible in areas with limited variability in pollen species. There is a need for rapid reporting of airborne pollen as well as for alleviating the workload of manual operation. We report our experience with a fully automated, image recognit...
incompatibility in hazelnut (c. avellana l.) is the sporophytic type and under the control of a single s-locus with multiple alleles. compatibility of pollen-stigma in hazelnut is an important consideration in planning crosses in breeding program and in choosing pollinizers for orchard planting. in this study, fluorescence microscopy was used to determination of s-alleles and compatibility rela...
background: the cultivation of saffron is expanding through the southeast of iran, and allergy to saffron pollen occurs in workers involved in processing this plant. we aimed to clone, sequence and express a major allergen involved in saffron pollen allergy, and to compare the recombinant with the natural allergen. methods: the n-terminal amino acid sequence of cro s 1, an allergen from saffron...
weed pollen grains belonging to the asteraceae family contain a variety of allergens inducing type i and iv allergies in susceptible people. the aim of this research was to compare the allergenic properties of immature and mature shasta daisy pollen grains (chrysanthemum maximum ramond) to define the potential role of the maturation process on the allergenicity of asteraceae pol...
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