Application of Biosynthesis of silver nanoparticles using Trachyspermum ammi extract in controlling of Onion bacterial rot
Subject Areas : Journal of plant ecophysiology
1 - گروه گیاه پزشکی، واحد جیرفت، دانشگاه آزاد اسلامی، جیرفت، ایران
Keywords: onion, biosynthesis, soft rot, Aqueous Extract of Ajowan and silver nanoparticles,
Abstract :
Today, the use of metal nanoparticles, as a suitable alternative to chemical poisons reduces their risk to the environment and consumers. Therefore, the aim of this study is the biosynthesis of silver nanoparticles using the aqueous extract of native Ajowan seeds and its effect against Onion bacterial rot. In this research, first, isolation and identification of pathogenic bacteria from different areas of Jiroft city was done. Then the biosynthesis of Ag NPs was carried out by aqueous extract of Ajowan seeds and the their effects against Pectobacterium were investigated in laboratory and warehouse conditions. A total of 12 bacterial isolates, N3 isolate from Anbarabad region had the highest pathogenicity. The biosynthesis of Ag NPs was confirmed by observing the date color after 15 minutes in the dark at room temperature and the ultraviolet spectrometer showed that the surface plasmon resonance is at 420 nm. The growth inhibition rate of biosynthesized Ag NPs and Mancozeb poison each alone and their combination against Pectobacterium in vitro were 62.45, 100 and 88.67%, respectively. Also, Ag NPs and Mancozeb each alone within three months and combining them together within two months caused 100% shelf life of onions in storage. However, the combination of biosynthesized Ag NPs and Mancozeb together with Pectobacterium had 100% inhibition in the first and second month and 85% in the third month against bacterial rot disease. Therefore, the results showed that biosynthesized Ag NPs were effective in controlling pathogenic bacteria and can replace agricultural toxins.