, Volume 54, Issue 2, pp 267–274 | Cite as

Zinc soil application enhances photosynthetic capacity and antioxidant enzyme activities in almond seedlings affected by salinity stress

  • A. Amiri
  • B. Baninasab
  • C. Ghobadi
  • A. H. Khoshgoftarmanesh
Original papers


Zinc is a critical mineral nutrient that protects plant cells from salt-induced cell damage. We tested whether the application of Zn at various concentrations [0, 5, 10, or 20 mg kg−1(soil)] would protect almond (Prunus amygdalus) seedlings subjected to salt stress (0, 30, 60, or 90 mM NaCl). All concentrations of Zn, particularly the application of 10 and 20 mg kg−1, increased the net photosynthetic rate, stomatal conductance, the maximal efficiency of PSII photochemistry, and a proline content in almond seedlings grown under salt stress; 20 mg(Zn) kg−1 was the most effective concentration. The activity of superoxide dismutase showed a significant increase under salinity stress and Zn application. The catalase activity decreased in the salt-treated seedlings, but recovered after the Zn treatment. Our results proved the positive effects of Zn on antioxidant enzyme activity scavenging the reactive oxygen species produced under salt stress.

Additional key words

abiotic stress gas exchange net assimilation rate reactive oxygen species 





transpiration rate


electrical conductivity


electrolyte leakage


maximum quantum yield of PSII


stomatal conductance


net photosynthetic rate


reactive oxygen species


superoxide dismutase


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Copyright information

© The Institute of Experimental Botany 2016

Authors and Affiliations

  • A. Amiri
    • 1
  • B. Baninasab
    • 1
  • C. Ghobadi
    • 1
  • A. H. Khoshgoftarmanesh
    • 2
  1. 1.Department of Horticulture, College of AgricultureIsfahan University of TechnologyIsfahanIran
  2. 2.Department of Soil Science, College of AgricultureIsfahan University of TechnologyIsfahanIran

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