Physiological evaluation of Valencia oranges treated with cobalt 60 gamma radiation

Transnational trade of 'Seedless Kishu' mandarins (Citrus kinokuni mukakukishu) would require them to be subjected to a suitable phytosanitary treatment. Irradiation is used as an effective treatment for many fruit, but the effect on quality of kishu mandarins is unknown. 'Seedless Kishu' mandarins were treated with gamma irradiation (150, 400, and 1000Gy) and stored for three weeks at 6°C and then for one week at 20°C. Irradiation at 400 and 1000Gy promoted browning of the calyx end and fungal infection. Irradiation caused immediate reductions in pulp firmness, vitamin E, individual sugars and carotenoids but increased the content of organic acids, except ascorbic acid, and phenolic compounds. The volatile profile of tested fruit was also differentially altered by irradiation. Most of these initial changes were dose dependent. 'Seedless Kishu' mandarins are significantly sensitive to irradiation and are not suitable for treatment at the studied doses.

show abstract

“…This effect might be a consequence of irradiation-mediated modification of cell wall components. Bustos and Mendieta (1988)…”

Section: Damage and Decaymentioning

confidence: 99%

Effect of phytosanitary irradiation on the postharvest quality of Seedless Kishu mandarins (Citrus kinokuni mukakukishu)

et al. 2017

View full text Add to dashboard Cite

show abstract

“…2000;Nagai and Moy 1985). Many of these effects have been related to the irradiation-mediated increase in ethylene biosynthesis and respiration rate (Ladaniya et al 2003), but the incidence and severity of these negative effects depend on orange variety, maturity stage, and irradiation dose (Bustos and Mendieta 1988;Miller et al 2000;Nagai and Moy 1985). 71…”

Section: Introductionmentioning

confidence: 99%

Effects of Fruit Position in Standard Place Pack Cartons and Gamma Irradiation on the Postharvest Quality of ‘Barnfield’ Navel Oranges

Rodriguez

Ornelas‐Paz

Ibarra-Junquera

et al. 2018

Food Bioprocess Technol

View full text Add to dashboard Cite

The objective of this study was to determine if oranges in the top and bottom layers within a Standard Place Pack were impacted differently by irradiation after long-term storage. ´Barnfield´ Navel oranges were packed in Standard Place Pack cartons and treated with 0, 0.15 or 1 kGy of gamma irradiation. The fruit were stored for three weeks at 5 °C and then for one week at 20 °C. After storage, the fruit from the top and bottom layers were separately evaluated for quality. The development of stem end rind breakdown (SERB) was the main cause of quality loss and was greater in irradiated fruit in the top layer. Fruit in the bottom layer showed more physical damage (flattening) but lower incidence of SERB. The changes in individual sugar content were minimal but significant for layer. The content of individual organic acids was consistently lower in irradiated fruit from the bottom layer. Layer type showed a stronger effect on phenolic compounds than irradiation dose. The tristimulus color, total soluble solids, titratable acidity, and firmness of fruit were not influenced by irradiation dose or layer type. The results show that damage in irradiated Navel oranges depends on dose and layer, with the top layers showing greater physiological damage and bottom layers showing more physical damage.

show abstract

Physiological evaluation of Valencia oranges treated with cobalt 60 gamma radiation

Cited by 2 publications

References 0 publications

Effect of phytosanitary irradiation on the postharvest quality of Seedless Kishu mandarins (Citrus kinokuni mukakukishu)

Effect of phytosanitary irradiation on the postharvest quality of Seedless Kishu mandarins (Citrus kinokuni mukakukishu)

Effects of Fruit Position in Standard Place Pack Cartons and Gamma Irradiation on the Postharvest Quality of ‘Barnfield’ Navel Oranges

Contact Info

Product

Resources

About