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Effects of climatic conditions on annual tree ring growth of the Platanus x hispanica "Acerifolia" under urban conditions of Szczecin

100%
Cedro A., Nowak G.
Dendrobiology
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2006
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tom 55
11-17
Szczecin harbours Poland’s largest London plane tree population. The London plane trees growing in Szczecin’s Żeromski Park were subjected to dendroclimatological research (analyses of signature years and response function). The study was based on a composite site chronology, signed ZER, spanning 105 years (1900–2004); the mean annual tree ring growth was 2.59 mm. Precipitation, particularly that in late winter- early spring and in the summer months was found to be a factor decisive for the tree’s cambial activity. A high sum of precipitation during the periods mentioned induced positive growth responses in the trees. Thermal conditions during the growth period proved to be another factor controlling the annual tree ring growth, as shown by linear relationships. The tree ring growth-climate relationships in the population under study as well as the between-parks differences in the London plane tree response can be explained by differences in habitat conditions. The trees under study grow in the vicinity of a busy, frequently repaired street and are surrounded by pavement and/or hardened road surface, which greatly limits the infiltration of moisture supplied by precipitation.
2
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Flowering phenology of selected wind pollinated allergenic deciduous tree species

100%
Kluza-Wieloch M., Szewczak J.
Acta Agrobotanica
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2006
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tom 59
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nr 1
Systematic phenological observations have been carried out in the Dendrological Garden of Agricultural University of Poznań, Park Solacki, Lasek Golęciński, Przybyszewskiego Street, for two years (2003, 2004). The selected species of deciduous trees, as Betula pendula, Corylus avellana, Platanus x hispanica. There was interdependence between the course of flowering process and weather conditions. Long and frosty winter at the turn of 2002/2003 and subzero mean temperatures in the first quarter of 2003 delayed vegetation. Rapid coming of early spring in the year 2004 accelerate the development of generative organs. Each year spring ground frost during flowering did not inhibit this process. All the investigated tree species are anemophilous and produce large amounts of allergenic pollen grain. They cause allergic reactions throughout the whole period of pollen discharge. Male inflorescences in Corylus avellana, blooming very early, are one of the first plants causing allergic reactions., Betula pendula is the next to bloom, followed by Platanus x hispanica. Observations of phenological phases may provide useful information forecasting the beginning of the period of increased pollen concentration in air.
3

Monitoring young urban trees tolerance to roadside conditions by application of the chlorophyll fluorescence technique

80%
Swoczyna T., Kalaji H. M., Pietkiewicz S., Borowski J., Zaras-Januszkiewicz E.
Zeszyty Problemowe Postępów Nauk Rolniczych
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2010
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tom 545
Urban environments create unfavourable conditions for tree growth, particularly for street trees, thus, the selection of tree species to severe growth conditions tolerance is of high importance. In our research, the chlorophyll a fluorescence technique was applied to monitor the physiological state of young trees of 8 species and cultivars growing in a street environment in Warsaw. Trees growing 2-3 m away from a road were compared to others growing minimum 8 meters away. Most of the measured parameters concerning photosynthesis, i.e. F0 and FV/FM revealed satisfying values in Acer campestre, Gleditsia triacanthos, Platanus x hispanica cv. Acerifolia and Pyrus calleryana cv. Chanticleer and close proximity to a road had no negative effect on the photosynthetic apparatus. Roadside trees of Ginkgo biloba, Tilia cordata cv. Greenspire and Tilia x europaea cv. Pallida often revealed higher F0 values and lower FV/FM values than the control trees. The results allowed us to distinguish the tolerant species growing under harsh streetside environmental conditions. The chlorophyll a fluorescence technique was found to be a convenient and rapid method for application in in situ experiments.
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