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Archives of Biological Sciences 2022 Volume 74, Issue 2, Pages: 169-180
https://doi.org/10.2298/ABS220309016H
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Assessment of differences in anatomical and hydraulic properties of the root and xylem of three willow (Salix L.) clones during phytostabilization after exposure to elevated cadmium

Hrkić-Ilić Zorana ORCID iD icon (Faculty of Forestry, University of Banja Luka, Banja Luka, Republic of Srpska, Bosnia and Herzegovina), zorana.hrkic-ilic@sf.unibl.org
Borišev Milan ORCID iD icon (University of Novi Sad, Faculty of Sciences, Department of Biology and Ecology, Novi Sad, Serbia)
Zorić Lana ORCID iD icon (University of Novi Sad, Faculty of Sciences, Department of Biology and Ecology, Novi Sad, Serbia)
Arsenov Danijela ORCID iD icon (University of Novi Sad, Faculty of Sciences, Department of Biology and Ecology, Novi Sad, Serbia)
Luković Jadranka ORCID iD icon (University of Novi Sad, Faculty of Sciences, Department of Biology and Ecology, Novi Sad, Serbia)

An anatomical study of adventitious roots of three Salix clones, ‘B-44’, ‘SV068’ and ‘SM4041’, treated with 3 and 6 mg Cd kg-1 dry weight in soil was performed in a greenhouse experiment. The aim was to analyze the anatomical characteristics of roots in response to pollution by cadmium and to assess the potential application of anatomical and hydraulic characteristics in the selection of the most suitable Salix clones for phytostabilization of pollutants in soils. Anatomical parameters measured in this study included root cross-sectional area, root diameter, the proportion of periderm, secondary phloem (cortex) and wood (secondary and primary xylem), and parameters of the vessels (lumen area, diameter and frequency). Based on the measurements of individual vessel lumens and the number of vessels, the theoretical hydraulic conductivity (kh) of roots was calculated. The effects of applied Cd concentrations on root traits were studied in clones and control plants. Following treatments with both Cd concentrations, plants of clone ‘B-44’ had the highest values of most parameters and significantly higher kh in comparison with control samples due to the significantly larger root cross-sectional area and lumen area of vessels. It was concluded that these characteristics can serve for effective evaluation and selection of studied clones for remediation of sites contaminated with cadmium.

Keywords: Salix, cadmium, root xylem, hydraulic conductivity, phytostabilization

Project of the Serbian Ministry of Education, Science and Technological Development, Grant no. 451-03-9/2021-14/200125


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