Abstract
ABSTRACT An investigation was carried out to evaluate the influence of the post-harvest application of different ethylene inhibitors viz., 1-methylcylcopropene (1-MCP; 500, 1000 and 1500 ppb), methyl jasmonates (MeJA; 1, 2 and 3 mM) and salicylic acid (SA; 1, 2 and 3 mM) on health-promoting compounds such as total phenols, total antioxidants, flavonoids, protein, total free amino acids and sugars in cold-stored ‘Kinnow’ mandarin fruit. The fruit were stored at 6 ± 1°C and 90 ± 5% RH for 75 days. Fruit treated with MeJA (1 mM), 1-MCP (1500 ppb) and SA (2 mM) maintained significantly highest levels of total phenols, total antioxidants activity, flavonoids, protein, total free amino acids and sugars as compared with the control. In conclusion the post-harvest application of MeJA (1 mM), 1-MCP (1500 ppb) and SA (2 mM) can be used to maintain the highest levels of these bioactive compounds in cold-stored ‘Kinnow’ mandarin fruit for up to 60 days.
Highlights
Horticultural crops are an ample source of health-promoting compounds including phenolic compounds and their antioxidative properties and are often cherished among consumers due to their health benefits as they are helpful in the cure of various ailments such as tumor and heartstroke (Parr and Bolwell, 2000; Rautiainen et al, 2012)
The fruit were treated with 1-methylcylcopro pene (1-MCP) (500, 1000 and 1500 ppb), methyl jasmonates (MeJA) (1, 2 and 3 mM) and salicylic acid (SA) (1, 2 and 3 mM). 1-MCP was applied to the fruit as fumigation for 24 hours, whilst, MeJA and SA were applied as 5 min dip treatments by following methods recently detailed by Baswal et al (2020)
The fruit treated with MeJA 1-MCP (1500 ppb) MeJA (1 mM) recorded significantly highest mean total phenols content (132.94 mg 100 ml−1 juice) as compared to control (98.78 mg 100 ml−1 juice) and all other treatments except 1-MCP 1500 ppb and SA 2 mM (131.73 mg 100 ml−1 juice and 131.27 mg 100 ml−1 juice, respectively)
Summary
Horticultural crops are an ample source of health-promoting compounds including phenolic compounds and their antioxidative properties and are often cherished among consumers due to their health benefits as they are helpful in the cure of various ailments such as tumor and heartstroke (Parr and Bolwell, 2000; Rautiainen et al, 2012). Citrus fruits are a plentiful source of phenolics, antioxidants and flavonoids. The accumulation of these bioactive compounds in the fruit can be hampered due to unsafe usages of different post-harvest approaches and lack of appropriate storage facilities (Connor et al, 2002). The post-harvest application of various GRAS chemicals on ‘Kinnow’ mandarin resulted in significantly higher levels of ascorbic acid and total carotenoids (Baswal et al, 2020), and total phenols and antioxidant activity (Haider et al, 2020). The efficacy of different concentrations of ethylene inhibitors viz., 1-MCP, MeJA and SA on bioactive compounds including phenolics, flavonoids, antioxidants, protein and total free amino acids in ‘Kinnow’ mandarin fruit during cold-storage warrants to be investigated
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
