Growth Response of Cuttings to Drought and Intermittent Flooding for Three Salix Species and Implications for Riverbank Soil Bioengineering

Keita, N.; Bourgeois, Bérenger; Evette, André; Tisserant, Maxime; Breton, Vincent; Goulet, Charles; Poulin, Monique

doi:10.1007/s00267-021-01444-3

Cited by 5 publications

(1 citation statement)

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“…These include some species that, because they grow in semi-arid regions, are potentially suitable for use in phytotechnology either in saline environments or for the treatment of saline materials (e.g., wastewater, landfill leachate). Information about willow drought stress tolerance is abundant, ranging from physiological [ 25 , 26 , 27 ] to more ecologically-focused studies [ 28 , 29 ]. However, relatively little research has been conducted on salinity tolerance in willow.…”

Section: Introductionmentioning

confidence: 99%

The Physiological Response of Different Brook Willow (Salix acmophylla Boiss.) Ecotypes to Salinity

Palm

Klein

Mancuso

et al. 2022

Plants

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Few phytoremediation studies have been conducted under semi-arid conditions where plants are subjected to drought and/or salinity stress. Although the genus Salix is frequently used in phytoremediation, information regarding its tolerance of drought and salinity is limited. In the present study, Salix acmophylla 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−1 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.

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