Changes in Antioxidant Enzymes Activity in Two Pelargonium Zonale Cultivars by Nanosilver Particles During Dark Storage

Document Type : Research Article

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Abstract

This investigation was carried out to study of nanosilver particles application on antioxidant enzymes activity and photosynthetic pigments during dark storage in two Pelargonium varieties "Anthuny” and “Bluewonder”. Treatments with nanosilver particles was done by foliar spraying in five levels (0, 20, 40, 60, 80 mg.L-1) during dark storage.  Results showed that there were significant different between the two varieties in Chl a and b and carotenoids contents under control and nanosilver particles up to 60 mg.L-1. The highest content of Chl a (0.048 mg.g-1 fw) and carotenoids (1.72 mg.g-1 fw) were observed in 60 mg L-1 nanosilver particles in Anthuny variety. Activity of SOD enzyme was increased in both varieties under 60 mg.L-1 nanosilver application but was decreased with increasing the concentration to 80 mg L-1. Also, these two varieties showed a significant difference between APX and POD enzyme activities. Increasing of nanosilver particles concentration in higher level caused to more oxidative stress in Bluewonder variety compare to Anthuny variety. Lipid peroxidation in both varieties in different concentrations of nanosilver up to 60 mg L-1  showed a significant difference compared to control variety, as this index in Anthuny variety  were lower than Bluewonder variety (respectively 11 and 12.2 nmol MDA/g.fw-1), under 60 mg. L-1 nanosilver treatment . The highest concentration of nanosilver not only didnt lipid peroxidation, but also caused severe diminish in longevity of Pelargonium flowers in both varieties.

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Volume 5, Issue 2 - Serial Number 2
December 2014
Pages 99-108

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