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Effects of increased seawater salinity irrigation on growth and quality of the edible halophyte Mesembryanthemum crystallinum L. under field conditions

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  • Atzori, Giulia
  • de Vos, Arjen C.
  • van Rijsselberghe, Marc
  • Vignolini, Pamela
  • Rozema, Jelte
  • Mancuso, Stefano
  • van Bodegom, Peter M.

Abstract

Saline agriculture may answer to the declining availability of fresh water and to the worldwide expanding area of salinized soils by exploiting seawater and salt-affected soils for sustainable food production. Potential salt tolerant crops can be found among edible halophytes. Moreover, plants growing in saline environments are often associated with an enhanced endogenous concentrations of high-nutrient compounds. Mesembryanthemum crystallinum L. provides an interesting perspective in becoming a salt-tolerant and high-value crop at saline conditions, but has never been tested at representative agricultural conditions. This study aimed at assessing the effects of increasing levels of seawater salinity irrigation (electrical conductivity: 2, 4, 8, 12, 16, 20, and 35dSm−1) on growth and productive performance in a field experiment. Also, impacts of salinity on the functional value of edible leaves were evaluated by investigating the mineral elements, carotenoids, soluble sugars, and phenolic concentrations, along with antioxidant activity. Our results demonstrate that none of the salinity treatments negatively affected M. crystallinum biomass production. Furthermore, increased salinity extended the vegetative stage, leading to one extra month of harvest compared to non-saline conditions. Juvenile edible leaves' biomass, succulence and calcium concentrations even increased with increasing salinity. No differences were assessed in the phenolics concentration and antioxidant activity of high salinity treatments plants compared to the control. This paper demonstrates the perspective to cultivate M. crystallinum in saline agriculture, up to EC of 20–35dSm−1, or perhaps even higher, since we did not identify a threshold of biomass reduction. Only the Na+ concentration in the edible leaves could constitute a health concern or allow it acting as a natural salt substitute. This excellent performance in combination with the appreciated taste and its glistening appearance, may pave the way for use of the ice plant as high-value saline crop.

Suggested Citation

  • 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.
    • Handle: RePEc:eee:agiwat:v:187:y:2017:i:c:p:37-46
    DOI: 10.1016/j.agwat.2017.03.020
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    References listed on IDEAS

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    1. 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.
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    1. 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).
    2. 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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