Melatonin Treatment Delays the Senescence of Cut Flowers of “Diguan” Tree Peony by Affecting Water Balance and Physiological Properties

Horticulturae, Journal Year: 2025, Volume and Issue: 11(2), P. 181 - 181

Published: Feb. 8, 2025

Tree peony (Paeonia suffruticosa Andr.), which is a traditional flower cultivated in China, rapidly becoming an important species the cut industry. Thus, extending vase life of tree flowers major goal Melatonin, new type antioxidant, plays regulatory role preservation flowers. Therefore, this study employed “Diguan” as test material to investigate preservative effects antioxidant melatonin on “Diguan”. We examined terms their morphology, lifespan, relative fresh weight, diameter, and water balance value after treatments with different concentrations (0.2, 0.3, 0.4, 0.5 mg·L−1) select optimal treatment concentration. Considered together, these analyses clarified Specifically, exogenous application positively affected by improving increasing soluble protein content enzyme activities, thereby prolonging ornamental period The weight branches significantly correlated protein, lifespan increases values branches, large correlation coefficient. It can be used indicator measure subsequent research. 0.4 mg L−1 was for preserving because its positive duration quality.

Language: Английский

---

Melatonin Treatment Maintains the Quality of Fresh-cut Gastrodia elata Under Low Temperature Conditions by Regulating Reactive Oxygen Species Metabolism and Phenylpropanoid Pathway

Published: Aug. 24, 2023

The application of melatonin (MT) has been shown to improve the quality during storage fruits and vegetables. primary objective this study is investigate effects MT on fresh-cut Gastrodia elata low temperature (4°C) storage. results indicate that treatment could suppress respiratory rate malondialdehyde content G. elata, while also slowing down decline in total acidity soluble solids. with reduced superoxide anions hydrogen peroxide production, inhibited activity expression peroxidase polyphenol oxidase. Additionally, it led increased antioxidant-related enzymes, including dismutase, catalase, ascorbate peroxidase, glutathione reductase, monodehydroascorbate dehydroascorbate resulted elevated levels ascorbic acid glutathione. Furthermore, induced an increase phenolic flavonoid enhanced key enzymes involved phenylpropanoid pathway (phenylalanine ammonia-lyase, cinnamate-4-hydroxylase, 4-coumarate: CoA ligase). In summary, enhances antioxidant capacity by activating both ROS metabolism pathway, thus maintaining fresh cut elata.

Language: Английский

---

Salicylic Acid Spray Delays Sand Pear Fruit Senescence during Room Temperature Shelf Life by Regulating Antioxidant Capacity and Senescence-Related Genes

Plants, Journal Year: 2024, Volume and Issue: 13(6), P. 848 - 848

Published: March 15, 2024

‘Whangkeumbae’ (Pyrus pyrifolia) is a variety of sand pear fruit well-known for its smooth surface and good taste. However, the quality adversely affected by postharvest ethylene production. Therefore, improving shelf life regulating senescence critical to promoting industry. Here, we investigated effect salicylic acid (SA) spray on in pears during room temperature life. Exogenous SA reduced polyphenol oxidase (PPO) activity malondialdehyde (MDA) content Additionally, effectively maintained skin coloration increased antioxidant enzymes, such as superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), ascorbate (APX). treatment inhibited PpPPO1 expression upregulated PpSOD1, PpAPX6, PpGST2 expression. Furthermore, application downregulated PpACO2, PpEIN3a, PpNCED1, PpAOC2, while upregulating PpNPR-1, PpTAR2, PpCOMT1 also influenced cell wall metabolism modification genes inhibiting PpPG1, PpPME2, PpCEL3 inducing PpPGIP1 sugar PpSPS1, PpSUS1, PpSOT1, PpTMT4, PpSWEET15, PpcyNAD-MDH, but suppressed PpcyNADP-ME. The Pearson correlation analysis indicated that PPO MDA were positively correlated with PpPPO1, PpCEL3, PpcyNDA-MDH. Conversely, these factors negatively associated activities SOD, POD, CAT, APX, well levels PpPOD1, PpCAT1, PpGST2, PpCOMT1, PpPGIP1, PpcyNAD-MDH. Our results reveal exogenous could delay various biochemical molecular mechanisms can be used extend storage. further research necessary determine whether fruits sprayed are suitable direct human consumption.

Language: Английский

---

Myrica rubra Preharvest Treatment with Melatonin Improves Antioxidant and Phenylpropanoid Pathways During Postharvest Storage

Foods, Journal Year: 2024, Volume and Issue: 14(1), P. 64 - 64

Published: Dec. 29, 2024

Myrica rubra is known for its popularity and robust nutritional value. While fresh fruit a perishable commodity, it has short post-harvest life susceptible to fungal decay after harvest. Melatonin been reported delay the aging quality decline of various fruits vegetables However, effects pre-harvest melatonin treatment on maintenance storage extension are still unclear. The impact spraying at different concentrations (100 μM, 300 500 μM) during room temperature or 4 °C was investigated. results indicated that in final stage storage, compared with control group, reduced index by 13.0–47.1% also decreased weight loss, content O2−•, malondialdehyde (MDA), respectively. Meanwhile, increased antioxidants such as superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), well total polyphenols flavonoids content. Finally, RNA transcriptome sequencing revealed enhanced antioxidant capacity increasing expression both enzymes changing phenylpropanoid pathway-related genes, therefore maintaining quality. Our findings uncovered potent role mechanism suggest may be convenient effective method prolonging picking.

Language: Английский

---