Photosynthetica, 2016 (vol. 54), issue 2

Photosynthetica 2016, 54(2):267-274 | DOI: 10.1007/s11099-016-0078-0

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

A. Amiri1, B. Baninasab1, C. Ghobadi1, A. H. Khoshgoftarmanesh2
1 Department of Horticulture, College of Agriculture, Isfahan University of Technology, Isfahan, Iran
2 Department of Soil Science, College of Agriculture, Isfahan University of Technology, Isfahan, Iran

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.

Keywords: abiotic stress; gas exchange; net assimilation rate; reactive oxygen species

Received: April 13, 2015; Accepted: October 6, 2015; Published: June 1, 2016Show citation

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Amiri, A., Baninasab, B., Ghobadi, C., & Khoshgoftarmanesh, A.H. (2016). Zinc soil application enhances photosynthetic capacity and antioxidant enzyme activities in almond seedlings affected by salinity stress. Photosynthetica, 54(2), 267-274. doi: 10.1007/s11099-016-0078-0.
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