Octapeptide NOP-1 treatment delays yellowing in broccoli floret during low temperature storage
Morteza Soleimani Aghdam and Farhang Razavi
Postharvest Biology and Technology, Volume 180, October 2021, 111628
2021
บทคัดย่อ
During postharvest life, floret yellowing confines broccoli's economic and nutritional worth. This study aimed to investigate the mechanisms activated by octapeptide NOP-1 (LKRYKRRL-NH2) treatment at 0, 250, 500, 750, or 1000 µM for retarding floret yellowing in broccoli during storage at 4โ€ฏ°C for 28 d. Our results revealed that the 750 µM NOP-1 treatment retarded chlorophyll degradation by suppressing pheophytinase (PPH) and pheophorbide a oxygenase (PaO) genes expression along with inhibiting Mg2+ dechelatase (MDC), and PPH enzymes activity. Besides, 750 µM NOP-1 treatment prevented jasmonic acid (JA) biosynthesis by suppressing phospholipase A (PLA), 13-lipoxygenase (13-LOX), allene oxide synthase (AOS), allene oxide cyclase (AOC), and OPDA reductase (OPR3) genes expression. Interestingly, 750 µM NOP-1 treatment maintained the membrane integrity in broccoli floret, evaluated by malondialdehyde (MDA) accumulation, which could be ascribed to the suppressing phosphatidylinositol 3-kinase (PI3K), phospholipase D (PLD), and 9-lipoxygenase (9-LOX) genes expression. Our results demonstrated that NOP-1, as an innovative, safe, and eco-friendly antisenescence octapeptide, significantly advances our technological proficiency to delay floret yellowing in broccoli during low temperature storage.