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Efficacy of preharvest salicylic acid treatment on postharvest quality enhancement of Marian plums (Bouea oppositifolia (Roxb.) Meisn.)
(2026-06-01)
Supapvanich, S.
;
Da, L.
;
Phakawan, J.
;
Techavuthiporn, C.
Marian plum (Bouea oppositifolia (Roxb.) Meisn.) is a tropical fruit tree that holds significant commercial importance in Southeast Asia. Softening and disease incidence are the main problems limiting the postharvest quality of the fruits. The purpose of this study was to determine the efficacy of preharvest salicylic acid (SA) spray on fruit quality maintenance during storage at room temperature (25±1°C). The fruits were preharvest sprayed with SA at concentrations of 0 (water), 1, 2, and 3 mM prior to harvest for 3 days. The finding showed that 3 mM SA evidently delayed the progression of fruit coloration from the time of harvest to the end of storage (day 8) in comparison to the control treatment. During storage, disease incidence in the 3 mM SA-treated fruits was not found in comparison to other treatments. All SA treatments reduced the magnitude of the weight loss increase. The 3 mM SA treatment delayed fruit softening, lipid membrane degradation, and an increase in total soluble solids, while maintaining a high level of total acidity. In addition, the application of 3 mM SA significantly increased the ferric reducing antioxidant potential, and all SA treatments effectively maintained free radical scavenging activity compared to the control treatment. In conclusion, preharvest SA spray at 3 mM prior to harvest is an effective approach to maintaining the postharvest quality of marian plums during storage.
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Efficacy of Preharvest Calcium Chloride and Calcium Gluconate Treatments on the Postharvest Quality Maintenance of Marian Plums During Shelf Life
(2026-01-01)
Li, Da
;
Sunthusamran, Sirima
;
Youryon, Pannipa
;
Bo, Wen
;
Supapvanich, Suriyan
Marian plum is a commercial fruit that deteriorates rapidly during storage. The effects of preharvest treatment with calcium chloride (CaCl₂) and calcium gluconate (CaGlu) at two concentrations (1 and 2%) on maintaining the postharvest quality of marian plum during shelf life at 26±2ºC were investigated. The fruits were sprayed with both calcium salts 2 days prior to harvest. The outcomes show that both the CaCl2 and CaGlu treatments preserved fruit visual appearance and postponed color development during shelf life. No fruit rot incidence appeared on the 2% CaCl2 and 2% CaGlu treated fruits during storage for 8 days. All calcium treatments retarded the increase in weight loss compared to the untreated fruits. The fruit firmness was maintained by the calcium treatments, and 2% CaGlu treatments improved the firmness greater than other treatments. Moreover, the increases in malondialdehyde (MDA), total soluble solids (TSS) and BrimA, as well as the decreased total acidity (TA) were lowered by the calcium treatments. The total phenols and antioxidant capacities, including ferric reducing antioxidant power (FRAP) and DPPH free radical scavenging activity, were enhanced by the calcium treatments. In correlation analysis, the firmness showed significantly negative correlation with MDA and parameters related to ripening. Moreover, the MDA had significant negative correlation with DPPH radical scavenging activity. The softening of the marian plum was closely related to membrane degradation. Both preharvest CaGlu and CaCl2 treatments at 2% are feasible approaches to preserve the postharvest quality of marian plums during shelf life at room temperature.
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Delaying quality changes in ‘Namdokmai Sithong’ mango fruit during low-temperature storage using trisodium phosphate
(2024-06-01)
Ganjana, R.
;
Kramchote, S.
;
Laosinwattana, C.
This study explored the efficacy of trisodium phosphate (TSP) in maintaining the postharvest quality of ‘Namdokmai Sithong’ mangoes under low-temperature storage conditions. Employing a completely randomized design, mangoes were treated with TSP at 0 (control), 0.25, 0.50, and 0.75 g L-1 and stored at 6±2°C with 85±5% RH for 25 days. Quality assessments, conducted every five days, focused on firmness, peel color, total soluble solids (TSS), hydrogen peroxide (H2O2), titratable acidity (TA), and phenolic content. Results showed that while TSP did not influence firmness, it significantly delayed peel color changes and affected TSS, H2O2, TA, and phenolic levels. The 0.50 and 0.75 g L-1 concentrations were most effective, with no marked difference between them, suggesting a recommendation of 0.50 g L-1 TSP for optimal cost-efficiency in preserving mango quality.
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Temperature Difference in Loading Area (Tarmac) during Handling of Air Freight Operations and Distance of Production Area Affects Quality of Fresh Mango Fruits (Mangifera indica L. ‘Nam Dok Mai Si Thong’)
(2022-11-01)
Srisawat, Kraisuwit
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Sirisomboon, Panmanas
;
Pun, Umed Kumar
;
Krusong, Warawut
;
Rakmae, Samak
Mango (Mangifera indica L.) ‘Nam Dok Mai Si Thong’ is an important cultivar for export from Thailand. Export mainly takes place via air transport, but for about 2 h at the loading area (tarmac), unit loading devices (ULDs) are exposed to ambient environmental conditions. In this research, the effects of different temperature conditions at the loading area (tarmac) and the distance of the production area from the tarmac on the quality of fresh mango fruits were studied. The treatments included three temperature conditions for 2 h (simulated handling in tarmac)—constant temperature (20 °C), non-insulated or insulated and exposed to sun—and two distances of the tarmac from the production area—short distance (i.e., transport occurring 53 h after harvest) and long distance (i.e., transport occurring 70 h after harvest). The temperature variation in the boxes exposed to the sun was greater in the non-insulated than in the insulated boxes, but this effect was more pronounced in fruit from the short-distance production area (28.1 °C insulated and 36.9 °C non-insulated) than in fruit from the long-distance production area (34.2 °C insulated and 38 °C non-insulated). Insulation and short distance increased the shelf life, decreased weight loss, delayed the decrease in average firmness and rupture force, etc. The insulation of mango fruit boxes mitigates the deleterious effect of exposure to 2 h of direct sun by reducing the increase in temperature, thus improving the shelf life and quality of mango fruit.
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Effects of methyl jasmonate on physicochemical qualities and internal browning of ‘queen’ pineapple fruit during cold storage
(2017-10-01)
Boonyaritthongchai, Panida
;
Supapvanich, Suriyan
The effects of methyl jasmonate (MeJA) as a protectant against chilling injury on physicochemical qualities of ‘Trad-see-thong’ pineapple (‘Queen’ group) fruit was investigated. The pineapple fruit were immersed in 1 mM MeJA for 5 min and then stored at 10 ± 1°C for 20 days. MeJA had no effect on respiratory rate and pulp colour, but suppressed ethylene production during cold storage. Weight loss, ion leakage (IL), internal browning (IB), and loss of pulp firmness were inhibited by MeJA. The MeJA treatment also suppressed the reduction of lightness (L*) and yellowness (b*) and the increase of total phenols (TP) that commonly occurs during cold storage, and increased the polyphenol oxidase (PPO) activity of pulp adjacent to the core (PAC) tissue. Certain bioactive compounds, such as ascorbic acid (AsA) and superoxide dismutase (SOD) in PAC tissues were enhanced by MeJA. No significant difference in peroxidase (POD) activity in both pulp and PAC tissues were detected between the treated and control fruits. These results suggest that immersion in MeJA is an effective means to maintain quality, alleviate IB symptoms, and enhance certain bioactive compounds in ‘Queen’ pineapple fruit cv. Trad-see-thong during cold storage.

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