Effect of calcium and salicylic acid on quality retention in relation to antioxidative enzymes in radish stored under refrigerated conditions

Abstract

Effect of post harvest treatments with calcium chloride (CaCl) and salicylic acid (SA) on physiological and biochemical parameters in relation to activities of antioxidative enzymes were investigated in radish. Radish of variety Punjab Safed Mooli 2 was harvested, washed and treated with CaCl (1, 1.5 and 2%) or SA (1, 1.5 and 2 mM). Treated as well as untreated radish were placed in open trays and stored under refrigerated (5 ± 1 °C, 90% RH) conditions for 42 days. Treatment of radish with CaCl and SA slowed down changes in physiological weight, colour, total soluble solids, ascorbic acid, titrable acidity, total phenolics and antioxidant activity. Treated samples exhibited higher enhancement in activities of antioxidant enzymes viz. catalase (CAT), superoxide dismutase (SOD), glutathione reductase (GR), peroxidase (POD), dehydroascorbate reductase (DHAR) and monodehydro-ascorbate reductase (MDHAR) than untreated samples. However SA was found to be more effective in slowing down the metabolic activities of radish as compared to CaCl treatment. Among all the treatments, 1.5 mM SA maintained the quality parameters to greater extent probably by reducing the oxidative stress to larger extent due to highest activities of antioxidative enzymes and can be used to enhance the shelf life of radish during refrigerated storage.

Pre-harvest Chemical Sprays Extend the Shelf Life and Maintain the Quality of Curry Leaf (Murraya koenigii Sprenge)

“…Tareen et al [13] reported in peach that the treatment of SA could facilitate closure of stomata which inturn controls respiration and transpiration rate resulting in reduced weight loss. Similar findings were reported by [14][15][16]. Followed by salicylic acid , combined spray of salicylic acid and ascorbic acid @ 100 ppm was also perfomed well.…”

Molecular Research for Cereal Grain Quality

“…JA functions as an upstream signal of the ICE-CBF pathway, positively modulating freezing responses [97]. JAZ1 and JAZ4 are JA signaling negative regulators interacting with ICE1 and ICE2 to repress their transcriptional activity [98]. Subsequently, they regulate the expression of CBF and other low-temperature responsive genes, thus affecting wheat cold resistance [97].…”

“…It is well known that SA plays a vital role in responding to abiotic stresses, apart from regulating crop growth, ripening and development [98,99]. SA activates the active oxygen species before low-temperature exposure; it promotes an increase in antioxidant enzyme activity and higher mRNA content of TaFeSOD, TaMnSOD, TaCAT gene transcripts, and free Proline after SCS [100].…”