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Exogenous melatonin maintains leaf quality of postharvest Chinese flowering cabbage by modulating respiratory metabolism and energy status
- Source :
- Postharvest Biology and Technology. 177:111524
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- The efficacy of melatonin on postharvest quality of Chinese flowering cabbage was investigated in this study. Treatment of Chinese cabbage with melatonin significantly delayed leaf yellowing and maintained higher contents of nutrients such as soluble sugars, protein, vitamin C, total flavonoids and phenols during a 7-day storage. Also, melatonin enhanced the activities and expression level of glucose-6-phosphate dehydrogenase (G6PDH) and 6-phosphogluconate dehydrogenase (6-PGDH). Melatonin treatment decreased tissue weight loss, respiration rate, activities of phosphohexose isomerase (PHI), succinate dehydrogenase (SDH), cytochrome C oxidase (CCO), and ascorbic acid oxidase (AAO) and the expression of their corresponding genes. Additionally, melatonin-treated leaves maintained high energy status, as evidenced by higher total ATPase and nicotinamide adenine dinucleotide kinase (NADK) activities, higher energy charge level, adenosine triphosphate (ATP) and adenosine diphosphate (ADP) contents, lower level of adenosine monophosphate (AMP) and transcript abundance of respiratory enzymes. These findings collectively suggest that melatonin maintains leaf quality of postharvest Chinese flowering cabbage might be, at least in part, due to the reduced ratio of Embden-Meyerhof-Parnas pathway (EMP), tricarboxylic acid (TCA) cycle, and cytochrome pathway (CCP), a relatively higher level of pentose phosphate pathway (PPP) and energy status.
- Subjects :
- 0106 biological sciences
Adenosine monophosphate
biology
ATPase
04 agricultural and veterinary sciences
Horticulture
Pentose phosphate pathway
Ascorbic acid
01 natural sciences
040501 horticulture
Melatonin
chemistry.chemical_compound
Adenosine diphosphate
chemistry
Biochemistry
biology.protein
medicine
Energy charge
0405 other agricultural sciences
Agronomy and Crop Science
Adenosine triphosphate
010606 plant biology & botany
Food Science
medicine.drug
Subjects
Details
- ISSN :
- 09255214
- Volume :
- 177
- Database :
- OpenAIRE
- Journal :
- Postharvest Biology and Technology
- Accession number :
- edsair.doi...........a07992d875557198aa5d5c5e8d0a0d43