Physiological Responses of <Emphasis Type="Italic">Rosa rubiginosa</Emphasis> to Saline Environment |
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Authors: | Tomasz Hura Bożena Szewczyk-Taranek Katarzyna Hura Krzysztof Nowak Bożena Pawłowska |
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Institution: | 1.Polish Academy of Sciences, The Franciszek Górski Institute of Plant Physiology,Kraków,Poland;2.Department of Ornamental Plants, Faculty of Biotechnology and Horticulture,University of Agriculture in Kraków,Kraków,Poland;3.Department of Plant Physiology, Faculty of Agriculture and Economics,University of Agriculture in Kraków,Kraków,Poland;4.Department of Dendrology and Landscape Architecture, Faculty of Biotechnology and Horticulture,University of Agriculture in Kraków,Kraków,Poland |
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Abstract: | The aim of this work was to analyse the response of Rosa rubiginosa to salinity induced by different concentrations of sodium chloride and calcium chloride (0, 25, 50, 100, 150 and 200 mM). Besides salt accumulation and pH changes, other parameters were investigated including photosynthetic activity, leaf water content, the dynamics of necrosis and chlorosis appearance and leaf drying. The study was complemented with microscopic analysis of changes in leaf anatomy. R. rubiginosa was more sensitive to the salinity induced by calcium chloride than by sodium chloride. Plant response to salinity differed depending of the salt concentration. These differences were manifested by higher dynamics of necrosis and chlorosis appearance and leaf drying. CaCl2 showed greater inhibition of the photosynthetic apparatus and photosynthetic activity. Treatment with CaCl2 caused more visible deformation of palisade cells, reduction in their density and overall reduction in leaf thickness. The study demonstrated higher accumulation of CaCl2 in the soil, and thus greater limitations in water availability resulting in reduced leaf water content and quicker drying of leaves as compared with NaCl-treated plants. |
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