Beneficial impact of exogenous arginine, cysteine and methionine on postharvest senescence of broccoli.

Abstract

This study examined the ability of l-arginine, l-cysteine and l-methionine, to inhibit postharvest senescence of broccoli. Florets were dipped in aqueous solutions of the amino acids at concentrations from 1.0 to 100 mM and stored at 10 °C. A 5 mM dip was found to be optimal in delaying senescence as measured by retention of green colour, vitamin C and antioxidant activity, and a lower level of ethylene production, respiration, weight loss, phenylalanine ammonia lyase (PAL) activity and ion leakage with the benefits being similar for all three amino acids. Arginine, cysteine and methionine have Generally Recognised As Safe (GRAS) status and should have few impediments in obtaining regulatory approval for commercial use if similar effects were found for other leafy vegetables.

• Authors: Muhammad Sohail, R B H Wills, M C Bowyer, Penta Pristijono
• Journal: Food chemistry (Food Chem) Vol. 338 Pg. 128055 (Feb 15 2021) ISSN: 1873-7072 [Electronic] England
• PMID: 32950008 (Publication Type: Journal Article)
• Copyright: Copyright © 2020 Elsevier Ltd. All rights reserved.

Chemical References

• Antioxidants
• Ethylenes
• Plant Proteins
• ethylene
• Arginine
• Methionine
• Ammonia-Lyases
• Cysteine
• Ascorbic Acid

Topics

• Ammonia-Lyases (metabolism)
• Antioxidants (chemistry, metabolism)
• Arginine (pharmacology)
• Ascorbic Acid (metabolism)
• Brassica (drug effects, metabolism)
• Cysteine (pharmacology)
• Ethylenes (metabolism)
• Methionine (pharmacology)
• Plant Proteins (metabolism)
• Time Factors