Use of biogenic silver nanoparticles in enhancing shelf life of Morus alba L. at post harvest stage

Abstract

Morus alba is one of the most important cultivated crop in indian sub-continent contributing towards production of silk fibre that carries economic importance worldwide. Post harvest preservation of M. alba leaves is a challenging factor as decrease in concentration of essential metabolites that needed for silk gland development takes place. Decrease in chlorophyll, protein, sugar concentration and increase in accumulation of free radicals and RoS takes place at post harvest stage of preservation, putting negative impact on larval development indicated by high mortality rate. Silver nitrate and nanosilver solution acts as an effective preservative, enhances the activity of enzymatic and nonenzymatic antioxidants thereby reducing the harmful effect of accumulated free radicals and ROS. The effectiveness of nanosilver solution was found to be on the upper site without any significant difference than silver nitrate, as higher retention of primary metabolites like pigments, proteins, and sugar takes place. the impact of feeding nanosilver preserved leaves on silkworm was found on the positive trend as larval growth rate, cocoon weight, shell weight, effective rate of rearing was observed almost same to the larvae fed with fresh leaves.

Extending vase life of carnation flowers by postharvest nano silver, humic acid and Aloe Vera gel treatments

“…Accumulation of phenols overcomes biotic and abiotic stress in various flowers (Ahmad and Tahir, 2017). Phenols are also classified as non-enzymatic antioxidants which nullifies the toxic effect of free radicals (Das and Mandal, 2020). This agrees with previous study (Naing and Kim, 2020).…”

Transcriptome analysis of mulberry (Morus alba L.) leaves to identify differentially expressed genes associated with post-harvest shelf-life elongation

“…Our earlier study in this aspect identified phytosynthesized silver nanoparticles at 6 ppm concentration significantly retains the physical texture of leaves till day 7 post-harvest 14 . We reported that nanosilver delays the senescence process by preventing the accumulation of molecules capable of causing oxidative damage through up-regulation of defensive processes, thereby preventing deterioration of primary metabolites 13 . The current study attempted to identify novel genes responsible for extending the post-harvest shelf life of mulberry leaves upon nanosilver application with respect to leaves preserved in distilled water for the same duration.…”

“…Transcriptome analysis has identified a significant number of proteins involved in scavenging activity in NS7, including CSD1, LOX1, LOX6, and DOX1. CSD1 (superoxide dismutase) catalyzes the dismutation of superoxide generated by photosynthetic electron transport reactions to hydrogen peroxide 13 , 78 . KEGG identified the participation of LOX1 and LOX6 in linoleic acid metabolism, thereby participating in the jasmonic acid biosynthetic and metabolic process identified by BiNGO.…”

“…It was reported that senescence causes isolation of chloroplast and generation of O 2 ·− through reduction of cellular O 2 by means of photosynthetic electron transport chain 10 . Generated O 2 ·− causes cell and organelle damage 11 , 12 by promoting the process of lipid peroxidation 7 , 13 .…”

“…Nanoparticles as preservative retains uniformity of photosynthetic apparatus and primary metabolite content. It nullifies generated reactive oxygen species (ROS) by activating enzymatic and non-enzymatic antioxidant-based defensive activities 13 .…”