L. Lőkös szerk.: Studia Botanica Hungarica 24. 1993 (Budapest, 1993)

Járainé Komlódi, Magda; Medzihradszky, Zsófia: Aeropollen research in the air of Budapest in 1992

STUDIA BOTANICA HUNGARICA (Antea: Fragmenta Botanica) XXIV. 1993 pp. 45-49 Aeropollen research in the air of Budapest in 1992 By M. Járai-Komlódi and Zs. Medzihradszky (Received November 20,1992) Abstract: Authors report the aeropollen content of Budapest in the whole pollen season. With the help of a Seven-day Recording Volumetric Spore and Pollen Trap they analysed the daily data from the beginning of February till the end of October. Since 1989 we have been doing quantitative and qualitative analysis of the aeropollen content in Hungary. Our aim was to identify the main pollen seasons and the significant allergenic taxa in our country. We already reported our results obtained in the last three years in several publications (JÁRAI-KOMLÓDI 1991a, 1991b, JÁRAI-KOMLÓDI et al. 1991, MEZEI et al. 1992a, MEZEI et al. 1992b). The present paper introduces our conclusions for the year of 1992 in Budapest. METHOD Daily aeropollen concentrations were analysed by using a Burkard Seven-day Recording Volumetric Spore and Pollen Trap. Our trap is accommodated and operated in compliance with the current standards of the European Allergenic Network. The daily data and their seven-day averages are shown in the diagrams. The seven-day averages give information about the trends of appearance of the taxa, while the daily data provide the extreme values of pollen spreading. Their common introduction, their comparison with the main meteorological data (temperature, precipitation, air-pressure, etc.) give more exact information regarding the atmospheric pollen content, the time and the degree of the prospective allergenity. RESULTS In 1992 we observed 21 taxa in the atmosphere of Budapest, the quantity of which occasionally or permanently exceeded 30 pollen per m

3 of the air. From among the trees and shrubs the Acer, Aesculus, Alnus, Betula, Celtis, Corylus, Cupressaceae, Fraxinus, Morus, Pinus, Platanus, Populus, Quercus and Taxus reached this level. Among them the Alnus, Betula, Corylus, Fraxinus, Platanus and the Quercus are known to cause considerable allergy (Fig. 1). In 1992 the amount of the tree pollen exceeded that of the same measured in 1991. The total calculated tree pollen was 15,132 as opposed to 9789 in the last year. Except for a few, like Acer, Alnus, Pinus, Platanus, the pollen production of each tree was higher. The flowering time began later in 1992 than in 1991; only 8 pollen fell into the trap before March. In spite of the extremely high pollen content, the spring pollen season causes the smallest problems for allergenic people in our country. Trees with prominent pollen production, like Pinus and Populus are not allergenic. Alnus, Betula and Corylus are not widely distributed trees