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<p>Soil salinization is a global challenge for agricultural productivity and ecosystem services. This study explored the physiological and biochemical responses to salt stress (10&#xa0;g L<sup>−1</sup> of NaCl) of <i>Atriplex hortensis</i> with a particular focus on its phytodesalination capacity, monitoring the plant allometry as well as Na<sup>+</sup> and Cl<sup>–</sup> translocation/accumulation in the plant’s organs. Plants were hydroponically cultivated with 0 (-Salt) or 10&#xa0;g L⁻<sup>1</sup> NaCl for 30&#xa0;days&#xa0;(+Salt), with periodic evaluations of biomass, ion accumulation, pigment content, oxidative stress markers, and antioxidant responses. Results indicate that salt-treated plants maintained a similar biomass yield compared to untreated individuals, with a slight reduction only observed after 30&#xa0;days from the beginning of treatment (FBT). However, salt stress led to a reduction of photosynthetic efficiency, with consistent differences over time, particularly concerning the net photosynthetic rate (P<sub>n</sub>), which decreased by 24.8%, and stomatal conductance (g<sub>s</sub>), which was reduced by 56.9%, compared to the controls. A significant decrease in chlorophyll content was observed in salt-treated plants with the progression of the treatment, specifically after 20 and 30&#xa0;days FBT. The substantial sodium accumulation in the aerial tissues, together with bioaccumulation and translocation factors &gt; 1, suggest that <i>A. hortensis</i> could be suitable for phytodesalination purposes. However, further studies are required to evaluate its performance and applicability under field conditions, to exploit this species for sustainable agricultural and ecological studies.</p>

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Bioaccumulation and translocation of Na+ in Atriplex hortensis grown in saline environment

  • 期刊论文

  • 发表日期：

    2026年2月13日

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  • Anna Davini,
  • Lorenzo D’Asaro,
  • Marco Landi,
  • Lucia Guidi,
  • Martina Puccinelli,
  • Marta Florio,
  • Marco Santin,
  • Costanza Ceccanti

摘要

Soil salinization is a global challenge for agricultural productivity and ecosystem services. This study explored the physiological and biochemical responses to salt stress (10 g L−1 of NaCl) of Atriplex hortensis with a particular focus on its phytodesalination capacity, monitoring the plant allometry as well as Na+ and Cl– translocation/accumulation in the plant’s organs. Plants were hydroponically cultivated with 0 (-Salt) or 10 g L⁻1 NaCl for 30 days (+Salt), with periodic evaluations of biomass, ion accumulation, pigment content, oxidative stress markers, and antioxidant responses. Results indicate that salt-treated plants maintained a similar biomass yield compared to untreated individuals, with a slight reduction only observed after 30 days from the beginning of treatment (FBT). However, salt stress led to a reduction of photosynthetic efficiency, with consistent differences over time, particularly concerning the net photosynthetic rate (Pn), which decreased by 24.8%, and stomatal conductance (gs), which was reduced by 56.9%, compared to the controls. A significant decrease in chlorophyll content was observed in salt-treated plants with the progression of the treatment, specifically after 20 and 30 days FBT. The substantial sodium accumulation in the aerial tissues, together with bioaccumulation and translocation factors > 1, suggest that A. hortensis could be suitable for phytodesalination purposes. However, further studies are required to evaluate its performance and applicability under field conditions, to exploit this species for sustainable agricultural and ecological studies.