Physiological Responses of Rosa rubiginosa to Saline Environment.

Water Air Soil Pollut. 2017;228(2):81. doi: 10.1007/s11270-017-3263-2. Epub 2017 Jan 28. Hura T1, Szewczyk-Taranek B2, Hura K3, Nowak K4, Pawłowska B2. Author information 1 Polish Academy of Sciences, The Franciszek Górski Institute of Plant Physiology, Niezapominajek 21, 30-239 Kraków, Poland. 2 Department of Ornamental Plants, Faculty of Biotechnology and Horticulture, University of Agriculture in Kraków, Al. 29 Listopada 54, 31-425 Kraków, Poland. 3 Department of Plant Physiology, Faculty of Agriculture and Economics, University of Agriculture in Kraków, Podłużna 3, 30-239 Kraków, Poland. 4 Department of Dendrology and Landscape Architecture, Faculty of Biotechnology and Horticulture, University of Agriculture in Kraków, Al. 29 Listopada 54, 31-425 Kraków, Poland. 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. KEYWORDS: Chlorophyll fluorescence; Chlorosis; Leaf anatomy; Photosynthesis; Salinity PMID: 28190899 PMCID: PMC5274639 DOI: 10.1007/s11270-017-3263-2 Free PMC Article Share on FacebookShare on TwitterShare on Google+