Effect of increasing zinc levels on Trigonella foenum-graecum growth and photosynthesis activity

Authors

  • Fadwa Melki Laboratory of Legumes and Sustainable Agrosystems, Centre of Biotechnology of Borj-Cedria, Tunisia
  • Ons Talbi Zribi Laboratory of Extremophiles Plants, Centre of Biotechnology of Borj-Cedria, Tunisia
  • Sabrine Jeder Laboratory of Legumes and Sustainable Agrosystems, Centre of Biotechnology of Borj-Cedria, Tunisia https://orcid.org/0000-0001-6101-3292
  • Faten Louati Laboratory of Legumes and Sustainable Agrosystems, Centre of Biotechnology of Borj-Cedria, Tunisia
  • Issam Nouairi Laboratory of Legumes and Sustainable Agrosystems, Centre of Biotechnology of Borj-Cedria, Tunisia https://orcid.org/0000-0003-1850-1164
  • Haythem Mhadhbi Laboratory of Legumes and Sustainable Agrosystems, Centre of Biotechnology of Borj-Cedria, Tunisia https://orcid.org/0000-0003-0786-4269
  • Kais Zribi Laboratory of Legumes and Sustainable Agrosystems, Centre of Biotechnology of Borj-Cedria, Tunisia

DOI:

https://doi.org/10.5073/JABFQ.2022.095.004

Abstract

Zinc is an indispensable element for the plant growth and the cellular metabolism. However, this mineral element becomes harmful at
high quantities. The effects of high zinc supply on different physiological parameters were investigated in fenugreek. Seedlings were grown in plastic pots filled with inert sand under five ZnSO4 treatments (C: control :1.5 μM Zn; 1mM, 2 mM, 3 mM and 4 mM ZnSO4). Results showed a decrease of 56% to 75% in shoot dry weight and a decrease of 65% to 90% in roots dry weight, relatively to the control. In addition we showed a significant reduction in photosynthetic parameters, with the highest value of CO2 assimilation under 1 mM Zn (3.3 μmol CO2, m-2·s-1) and a lower value under 4 mM Zn (0.5 μmol CO2, m-2·s-1). The concentration of zinc in plant shoot was around two folds the control under 1, 2 and 3 mM Zn and about four folds under the maximal concentration, 4 mM Zn. In roots, we showed a progressive increase of zinc content. Increasing zinc concentration induced a significant decrease of phosphorus concentration in shoot. Fenugreek was mainly affected by zinc excess greater than 1 mM ZnSO4, however at the highest concentration, fenugreek plants exhibited different adaptation strategies.

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Published

2022-03-04

Issue

Vol. 95 (2022): Journal of Applied Botany and Food Quality

Section

Plant physiology

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Copyright (c) 2022 The Author(s)

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