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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
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Toto dielo je publikované pod/This work is licensed under a Creative Commons Attribution 4.0 International License.