Autor(i)/Author(s): Viera Paganová, Zuzana Jureková, Helena Lichtnerová
Názov/Title: Adaptability of Pyrus pyraster and Sorbus domestica to drought as prerequisite of their utilization in urban environment
Zdrojový dokument/Source: Plants in Urban Areas and Landscape
Typ dokumentu/Document Type: Scientific paper
ISBN: 978-80-552-1262-3
DOI: http://dx.doi.org/10.15414/2014.9788055212623.47-51
Vydavateľ/Publisher: Slovak University of Agriculture in Nitra
Rok, strany/PY, pages: 2014, 47-51
Publikované online/Published on-line: 2015-01-20
Jazyk/Language: eng
Abstract: The aim of study was identification and assessment of the adaptive responses of roots and shoots of two tree species Pyrus pyraster and Sorbus domestica to water scarcity in the juvenile stage of their growth. One-year old seedlings were placed in
the plant boxes filled with fertilized peat substrate and maintained (for 170 days) in a differentiated water regime with two
variants of the substrate saturation at 40 % and 60 % of the full water capacity. For each taxon were analysed 10 plants in
both variants of the water regime. Following characteristics were examined: dry weight of above-ground organs (leaves +
shoots) DWS, dry weight of roots DWR, dry weight of whole plant DWP, total water content of above-ground organs TWCS, the
total water content in the root system TWCR, specific leaf area SLA (the ratio of leaf area to dry mass) and shoot to root ratio
(S : R). According to the obtained results adaptability of the studied tree species to water scarcity is different. Pyrus pyraster
in both variants of water regime maintained balanced values for all parameters of dry matter, distributed them evenly to
aboveground organs and roots. Under drought created smaller and thicker leaves and significantly invested more resources
to root growth (S : R = 0.42). Sorbus domestica has fast growth – created almost three times higher amount of dry matter
compared with pear, but lower potential for adaptability to water scarcity. In reaction to water scarcity significantly reduced
the total dry matter and dry matter of roots (S : R = 0.71). In drought created thinner leaves.
Keywords: adaptability, drought, dry mass, urban conditions, water regime
Práva/Rights: Act on copyright and rights related to copyright (Copyright Act) as amended (consolidated version), Slovak Republic; Creative Commons Attribution 4.0 Licence
Toto dielo je publikované pod/This work is licensed under a Creative Commons Attribution 4.0 International License.
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