The Physiological Response of Different Brook Willow (<i>Salix acmophylla</i> Boiss.) Ecotypes to Salinity
Few phytoremediation studies have been conducted under semi-arid conditions where plants are subjected to drought and/or salinity stress. Although the genus <i>Salix</i> is frequently used in phytoremediation, information regarding its tolerance of drought and salinity is limited. In the...
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| Format: | Article |
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MDPI AG
2022-03-01
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| Series: | Plants |
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| Online Access: | https://www.mdpi.com/2223-7747/11/6/739 |
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| author | Emily Palm Joshua D. Klein Stefano Mancuso Werther Guidi Nissim |
| author_facet | Emily Palm Joshua D. Klein Stefano Mancuso Werther Guidi Nissim |
| author_sort | Emily Palm |
| collection | DOAJ |
| description | Few phytoremediation studies have been conducted under semi-arid conditions where plants are subjected to drought and/or salinity stress. Although the genus <i>Salix</i> is frequently used in phytoremediation, information regarding its tolerance of drought and salinity is limited. In the present study, <i>Salix acmophylla</i> Boiss. cuttings from three sites (Adom, Darom and Mea She’arim) were tested for tolerance to salinity stress by growing them hydroponically under either control or increasing NaCl concentrations corresponding to electrical conductivities of 3 and 6 dS m<sup>−1</sup> in a 42-day greenhouse trial. Gas exchange parameters, chlorophyll fluorescence and concentration, and water-use efficiency were measured weekly and biomass was collected at the end of the trial. Root, leaf and stem productivity was significantly reduced in the Adom ecotype, suggesting that Darom and Mea She’arim are the more salt-tolerant of the three ecotypes. Net assimilation and stomatal conductance rates in salt-treated Adom were significantly reduced by the last week of the trial, coinciding with reduced intrinsic water use efficiency and chlorophyll a content and greater stomatal aperture. In contrast, early reductions in stomatal conductance and stomatal aperture in Darom and Mea She’arim stabilized, together with pigment concentrations, especially carotenoids. These results suggest that Darom and Mea She’arim are more tolerant to salt than Adom, and provide further phenotypic support to the recently published data demonstrating their genetic similarities and their usefulness in phytoremediation under saline conditions. |
| first_indexed | 2024-03-09T12:56:06Z |
| format | Article |
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| institution | Directory Open Access Journal |
| issn | 2223-7747 |
| language | English |
| last_indexed | 2024-03-09T12:56:06Z |
| publishDate | 2022-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Plants |
| spelling | doaj.art-98a22558a1c64062a1d8d8c0d93feb012023-11-30T22:00:24ZengMDPI AGPlants2223-77472022-03-0111673910.3390/plants11060739The Physiological Response of Different Brook Willow (<i>Salix acmophylla</i> Boiss.) Ecotypes to SalinityEmily Palm0Joshua D. Klein1Stefano Mancuso2Werther Guidi Nissim3Dipartimento di Scienze e Tecnologie Agrarie, Alimentari, Ambientali e Forestali (DAGRI), University of Florence, Viale Delle Idee 30, 50019 Sesto Fiorentino, ItalyDepartment of Natural Resources, Institute of Plant Sciences, Agricultural Research Organization, The Volcani Center, P.O. Box 15159, Rishon LeZion 7505101, IsraelDipartimento di Scienze e Tecnologie Agrarie, Alimentari, Ambientali e Forestali (DAGRI), University of Florence, Viale Delle Idee 30, 50019 Sesto Fiorentino, ItalyDepartment of Biotechnology and Biosciences, University of Milano-Bicocca, Piazza Della Scienza 3, 20126 Milano, ItalyFew phytoremediation studies have been conducted under semi-arid conditions where plants are subjected to drought and/or salinity stress. Although the genus <i>Salix</i> is frequently used in phytoremediation, information regarding its tolerance of drought and salinity is limited. In the present study, <i>Salix acmophylla</i> Boiss. cuttings from three sites (Adom, Darom and Mea She’arim) were tested for tolerance to salinity stress by growing them hydroponically under either control or increasing NaCl concentrations corresponding to electrical conductivities of 3 and 6 dS m<sup>−1</sup> in a 42-day greenhouse trial. Gas exchange parameters, chlorophyll fluorescence and concentration, and water-use efficiency were measured weekly and biomass was collected at the end of the trial. Root, leaf and stem productivity was significantly reduced in the Adom ecotype, suggesting that Darom and Mea She’arim are the more salt-tolerant of the three ecotypes. Net assimilation and stomatal conductance rates in salt-treated Adom were significantly reduced by the last week of the trial, coinciding with reduced intrinsic water use efficiency and chlorophyll a content and greater stomatal aperture. In contrast, early reductions in stomatal conductance and stomatal aperture in Darom and Mea She’arim stabilized, together with pigment concentrations, especially carotenoids. These results suggest that Darom and Mea She’arim are more tolerant to salt than Adom, and provide further phenotypic support to the recently published data demonstrating their genetic similarities and their usefulness in phytoremediation under saline conditions.https://www.mdpi.com/2223-7747/11/6/739willowsalinity stressphytoremediation<i>Salix acmophylla</i>salt tolerancedrought tolerance |
| spellingShingle | Emily Palm Joshua D. Klein Stefano Mancuso Werther Guidi Nissim The Physiological Response of Different Brook Willow (<i>Salix acmophylla</i> Boiss.) Ecotypes to Salinity Plants willow salinity stress phytoremediation <i>Salix acmophylla</i> salt tolerance drought tolerance |
| title | The Physiological Response of Different Brook Willow (<i>Salix acmophylla</i> Boiss.) Ecotypes to Salinity |
| title_full | The Physiological Response of Different Brook Willow (<i>Salix acmophylla</i> Boiss.) Ecotypes to Salinity |
| title_fullStr | The Physiological Response of Different Brook Willow (<i>Salix acmophylla</i> Boiss.) Ecotypes to Salinity |
| title_full_unstemmed | The Physiological Response of Different Brook Willow (<i>Salix acmophylla</i> Boiss.) Ecotypes to Salinity |
| title_short | The Physiological Response of Different Brook Willow (<i>Salix acmophylla</i> Boiss.) Ecotypes to Salinity |
| title_sort | physiological response of different brook willow i salix acmophylla i boiss ecotypes to salinity |
| topic | willow salinity stress phytoremediation <i>Salix acmophylla</i> salt tolerance drought tolerance |
| url | https://www.mdpi.com/2223-7747/11/6/739 |
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