Approximately 20-40 percent of the US population suffers from allergic rhinitis. As pollens contribute significantly to allergic rhinitis, monitoring local pollen counts can help patients and providers better manage this condition (1). Identification of local pollens can help the clinician more accurately select allergens for testing and immunotherapy, and improve advice to sensitized patients ...

Pollen embryogenesis provides a useful means of generating haploid plants for plant breeding and basic research. Although it is well-established that the efficacy of the process can be enhanced by the provision of immature pistils as a nurse tissue, the origin and compound class of the signal molecule(s) involved is still elusive. Here, a micro-culture system was established to enable the cultu...

background: platanus species are widely cultured around the world and considered an important cause of allergic reactions. in the present study, we developed a sandwich elisa to quantify pla or 3 allergen in p. orientalis pollen extracts grown near high-traffic roads and compared it to pollen extracts collected from rural areas as control. methods: pollen samples were collected from three pollu...

During double fertilization of angiosperms, the central cell of the female gametophyte fuses with a sperm cell to produce the endosperm, a storage tissue that nourishes the developing embryo within the seed. Although many genetic mutants defective in female gametophytic functions have been characterized, the molecular mechanisms controlling the specification and differentiation of the central c...

The behavior of Japanese cedar (Cryptomeria japonica) and Japanese cypress (Chamaecyparis obtusa) pollens in an urban area was examined through the measurements of the dispersion characteristics at the various sampling locations in both outdoor and indoor environments. Airborne pollens were counted continuously for three months during the Japanese cedar pollen and Japanese cypress seasons in 20...

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Annonaceae, comprising approximately 107 genera and 2400 species, is the largest family among early-divergent Magnoliales. Previous studies have concentrated on binding mechanism that holds together four members of tetrads in Annonaceae. However, development mechanisms different tetrad types remain largely unknown. Mitrephora tomentosa was found to exhibit five permanent types, with two or thre...