Λεξικό .. American Beech

American Beech [(L) Fagus grandifolia, F. Americana, (Ger.) Buche, (Fr.) Hetre, (Gr.) :

American beech is found in northeastern  America. In Europe this species is replaced with Common Beech (Fagus Sylvatica). It occurs particularly in chalk and limestone soils, occasionally in woods and sometimes is cultivated. It flowers in April to May.

Beech shows high cross-reactivity among different species within the same family. Beech and oak pollen contain allergens that cross-react with the birch pollen allergens Bet v 1, Bet v 2 and Bet v 4 and with the berberine bridge enzyme-like allergen Phl p 4 from timothy grass pollen. Sera from Swiss and Austrian patients exhibited similar IgE reactivity profiles to birch, beech and oak pollen extracts.

IgE levels to beech and oak pollen allergens were lower than those to birch pollen allergens. IgE reactivity to beech pollen is mainly due to cross-reactivity with birch pollen allergens, and a Phl p 4-like molecule represented another predominant IgE-reactive structure in oak pollen. The characterization of beech and oak pollen allergens and their cross-reactivity is important for the diagnosis and treatment of beech and oak pollen allergy.[1] t5 is the symbol of American beech in RAST. See Fagus Sylvatica.

References

Egger C, Focke M, Bircher AJ, Scherer K, Mothes-Luksch N, Horak F, Valenta R. The allergen profile of beech and oak pollen. Clin Exp Allergy.2008 Oct;38(10):1688-96. Epub 2008 Aug 25