Prospective response of Phaseolus vulgaris seeds primed in silver nanoparticles and aqueous phycocyanin extracted from Spirulina platensis

Document Type : Original Article

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1 Department of Botany and Microbiology, Faculty of Science, Zagazig University, Egypt

2 Botany and Microbiology Department, Faculty of Science, Zagazig University

Abstract

The metabolic effects of silver nanoparticles AgNPs prepared by phycocyanin extracted from Spirulina platensis on metabolic activities of economic plant Phaseolus vulgaris including  seed germination, pigments(chl. a, chl. b and carotenoids) , carbohydrates, total lipids, amino acid contents, proline, protein banding, malondialdehyde  as well as the  antioxidant enzymes activities,  superoxide dismutase [SOD], peroxidase [APX], and non-enzymatic antioxidants such as glutathione reductase (GR), catalase [CAT] have been investigated. The results demonstrated that all studied parameters seed germination, pigments, carbohydrates, and total lipids were stimulated by low concentrations of AgNPs [5-30 ppm].   On the other hand, the high concentrations of AgNPs [40–50 ppm] exhibited an inhibitory effect .The three antioxidant enzymes SOD, CAT, and GR were increased in a dose-dependent manner as a result of the increase in AgNPs concentrations. The total amino acids progressively increased under the same treatment. Electrophoretic polypeptide banding patterns consists of 159 bands with a molecular weight range of 27 to 145 kDa. Ten bands—represented polymorphic loci with the value of 6.21 %, whereas 6 bands—represented monomorphic loci with value of 3.77%. The most polypeptide bands [14 bands] were discovered in phycocyanin treatments at lane 5 with molecular weights ranging from 27 to 129 KDa as well as AgNPs treatments at lanes 9, 11 and 13 with a value reaching 8.80% and molecular weights ranging from 27 to 145 kDa.

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