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Tetragonia tetragonioides (Pallas) Kuntz. as promising salt-tolerant crop in a saline agricultural context

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  • Atzori, Giulia
  • Nissim, Werther
  • Macchiavelli, Tania
  • Vita, Federico
  • Azzarello, Elisa
  • Pandolfi, Camilla
  • Masi, Elisa
  • Mancuso, Stefano

Abstract

The lack of natural resources, especially good-quality cropland and renewable water resources is threatening food production potential in marginal agricultural ecosystems, which are already negatively affected by climate change. Since the world's major crops are proving inadequate to supply the calories and nutrients for people in these areas, new crops are sought that can withstand harsh ecological environmental conditions. In the current trial, we assessed the growth and productivity of Tetragonia tetragonioides (Pallas) Kuntz. in a floating hydroponic system supplied with different seawater proportions (i.e. 15% and 30% seawater, EC = 9.8 and 18.0 dS m−1). Moreover, the effects of different salinity levels on mineral elements accumulation, production of osmotic solutes and secondary metabolites were determined, along with the salt removal capacity of the crop. The results indicated that plant growth was not affected by either of the seawater treatments used in this study. The increased leaf succulence and the reduction of both leaf area and specific leaf area with increasing salinity might represent an essential feature of this salt-tolerant species associated to the plants need of limiting transpiration. Low seawater treated plants showed a significantly higher biomass yield per liter of (sea)water used (117%) than the control. Under these conditions plants accumulated the highest amount of Mg (+31% and 48% in medium and high seawater treated plants compared with the control) and Cu (+14% and 30%, respectively) along with increasing proline and decreasing nitrate concentrations. By contrast, we found that seawater supply resulted in a Na-enriched leaf biomass that may represent an issue for human health. We concluded that Tetragonia tetragonioides can be grown in saline agriculture up to a salinity level characterized by an EC of 18 dS m-1 but further investigation is required to address Na accumulation in leaves.

Suggested Citation

  • Atzori, Giulia & Nissim, Werther & Macchiavelli, Tania & Vita, Federico & Azzarello, Elisa & Pandolfi, Camilla & Masi, Elisa & Mancuso, Stefano, 2020. "Tetragonia tetragonioides (Pallas) Kuntz. as promising salt-tolerant crop in a saline agricultural context," Agricultural Water Management, Elsevier, vol. 240(C).
    • Handle: RePEc:eee:agiwat:v:240:y:2020:i:c:s037837741932205x
    DOI: 10.1016/j.agwat.2020.106261
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    References listed on IDEAS

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    1. Atzori, Giulia & de Vos, Arjen C. & van Rijsselberghe, Marc & Vignolini, Pamela & Rozema, Jelte & Mancuso, Stefano & van Bodegom, Peter M., 2017. "Effects of increased seawater salinity irrigation on growth and quality of the edible halophyte Mesembryanthemum crystallinum L. under field conditions," Agricultural Water Management, Elsevier, vol. 187(C), pages 37-46.
    2. Katerji, N. & van Hoorn, J. W. & Hamdy, A. & Mastrorilli, M., 2003. "Salinity effect on crop development and yield, analysis of salt tolerance according to several classification methods," Agricultural Water Management, Elsevier, vol. 62(1), pages 37-66, August.
    3. Flowers, T.J. & Flowers, S.A., 2005. "Why does salinity pose such a difficult problem for plant breeders?," Agricultural Water Management, Elsevier, vol. 78(1-2), pages 15-24, September.
    4. Atzori, Giulia & Guidi Nissim, Werther & Caparrotta, Stefania & Santantoni, Federico & Masi, Elisa, 2019. "Seawater and water footprint in different cropping systems: A chicory (Cichorium intybus L.) case study," Agricultural Water Management, Elsevier, vol. 211(C), pages 172-177.
    5. Atzori, Giulia & Guidi Nissim, Werther & Caparrotta, Stefania & Masi, Elisa & Azzarello, Elisa & Pandolfi, Camilla & Vignolini, Pamela & Gonnelli, Cristina & Mancuso, Stefano, 2016. "Potential and constraints of different seawater and freshwater blends as growing media for three vegetable crops," Agricultural Water Management, Elsevier, vol. 176(C), pages 255-262.
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    1. Okuhle Mndi & Avela Sogoni & Muhali Olaide Jimoh & Carolyn Margaret Wilmot & Fanie Rautenbach & Charles Petrus Laubscher, 2023. "Interactive Effects of Salinity Stress and Irrigation Intervals on Plant Growth, Nutritional Value, and Phytochemical Content in Mesembryanthemum crystallinum L," Agriculture, MDPI, vol. 13(5), pages 1-21, May.

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