Seasonal variability of the response of desert lemons to rind injury and decay caused by quarantine cold treatments

Houck, Laurie G.; Jenner, Joel F.; Mackeyf, B. E.

doi:10.1080/00221589.1990.11516100

Cited by 17 publications

(7 citation statements)

References 8 publications

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“…Thus far, it appears that early and lateseason grapefruit are much more sensitive to low temperature than midseason fruit (Schirra et al, 1998), while desert lemons [Citrus limon (L.) Burm.] (Houck et al, 1990) and blood oranges (Schirra et al, 1997, Schirra and D'hallewin, unpublished data) are more susceptible when they are harvested early in the season.…”

Section: Discussionmentioning

confidence: 99%

Scoparone and Scopoletin Accumulation and Ultraviolet-C Induced Resistance to Postharvest Decay in Oranges as Influenced by Harvest Date

Droogmans¹,

Schirra²,

Manueddu³

et al. 1999

jashs

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`Washington Navel', `Biondo Comune', `Tarocco', and `Valencia Late' orange [Citrus sinensis (L.) Obsek] fruit, harvested at various periods of time, were subjected to ultraviolet-C (UV-C) irradiation at 0.5, 1.5, or 3.0 kJ·m-2 doses and then stored at 7 °C and 90% to 95% relative humidity (RH) for 4 weeks plus one additional week at 20 °C and 80% RH. Following UV-C treatment, there was varying amounts of rind browning and necrotic peel damage, depending on cultivar, treatment dose, and harvest date. `Tarocco' fruit were damaged more easily by UV-C treatment than the other cultivars. `Valencia L.' were the most resistant to UV-C irradiation, showing no adverse effects at the lowest dosage and having the lowest percentages of damaged fruit at higher dosages. `Washington Navel' and `Biondo Comune' oranges showed an intermediate susceptibility to UV-C treatment, with negligible differences between these cultivars. The percentage of damaged fruit after irradiation at the higher UV-C dosages decreased in most fruit samples as the season progressed. UV-C irradiation at 0.5 kJ·m-2 effectively reduced decay development compared with nontreated fruit. Irradiation with 1.5 kJ·m-2 was more effective compared with 0.5 kJ·m-2 only in early harvested fruit. In `Washington Navel' and `Biondo Comune' oranges in the later harvests, treatment with 3.0 kJ·m-2 improved decay control further, compared with 0.5 kJ·m-2. Following UV-C treatments the phytoalexins, scoparone and scopoletin, accumulated in flavedo tissue depending on the cultivar, fruit age, and UV-C treatment. Both phytoalexins displayed a similar accumulation pattern, however, the levels of scopoletin were very low compared with scoparone. Concentrations of phytoalexins rose as the irradiation dose increased. No scoparone and scopoletin could be detected in nontreated fruit. The highest concentration of phytoalexins among cultivars was recorded in `Valencia Late' oranges, the lowest in `Tarocco', with similar intermediate accumulations in `Washington Navel' and `Biondo Comune'. In `Washington Navel', `Biondo Comune', and `Tarocco' oranges, the rate of scoparone accumulation was significantly higher in fruit harvested earlier in the season while `Valencia late' oranges exhibited an opposite trend.

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Section: Discussionmentioning

confidence: 99%

Scoparone and Scopoletin Accumulation and Ultraviolet-C Induced Resistance to Postharvest Decay in Oranges as Influenced by Harvest Date

Droogmans¹,

Schirra²,

Manueddu³

et al. 1999

jashs

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“…A correlation between harvest date and susceptibility to CI has been reported in lemons by Houck et al (1990). Tugwell and Nechvoglod (1987) also reported a seasonal increase in surface blemish.…”

Section: Resultsmentioning

confidence: 72%

“…(1978) reported that susceptibility to CI was related to minium field temperature, with higher temperatures resulting in increased CI resistance. However, Houck et al (1990) suggested that early season (high temperature) fruit was more susceptible to CI than mid-or late-season (lower temperature) fruit. Resistance has been related to accumulation of reducing sugars (Purvis and Grierson, 1982), proline content (Purvis, 1981), and putrescine concentration (McDonald and Kushad, 1986) in the peel.…”

Section: Resultsmentioning

confidence: 99%

“…Eureka and Lisbon) at 1C for 14 days (Hill et al, 1988) was recently accepted by the Japanese Ministry of Agriculture, Forestry, and Fisheries as a quarantine treatment for Queensland fruit fly. In response to the withdrawal of ethylene dibromide registration, similar disinfestation treatments also have been investigated for other citrus fruit (Adsule et al, 1984(Adsule et al, , 1987Chalutz et al, 1985;Hill et al, 1988;Houck et al, 1990;Purvis, 1984). The first sea-freight consignment of cold-disinfested 'Eureka' lemons from the Gayndah region (southeastern Queensland, Australia) was exported to Japan in May 1992.…”

Section: Methodsmentioning

confidence: 99%

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`Eureka' Lemon Chilling Injury

Underhill¹,

McLauchlan²,

Eaks³

1995

HortSci

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In accordance with the currently approved Australian citrus disinfestation protocol for export to Japan, degreened `Eureka' lemons [Citrus limon (L.) Burm.] were cold-stored for 2 weeks at 1C. Following cold treatment, fruit were stored at 5C for 3 weeks, then transferred to 20C for an additional week to simulate transportation and handling. Fruit harvested early in the season were more susceptible to chilling injury than fruit harvested later, with 62% having lesions >1 cm2 after 2 weeks at 1C. Most of the chilling injury occurred after subsequent storage (at 5C) rather than immediately after the 1C treatment. Injury was different from surface pitting or oleocellosis, manifesting as large uniform surface lesions 2 to 3 cm in diameter that rapidly discolored following storage at 20C. Although the oil glands were flattened, the collenchyma layer immediately above the oil gland remained intact. Cellular discoloration was localized around the oil gland, possibly indicating a lateral release of oil gland contents. Nondegreened late-season fruit developed substantially lower levels of chilling injury.

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“…Conditioning lemons for 1 week at 15C before storing them at lC significantly reduced CI incidence and severity (Houck et al, 1990). Prestorage treatments with high CO 2 concentrations (10%, 20%, or 40%) for 3 or 7 days at 21C significantly reduced rind pitting in grapefruit stored at 4.4C for 8 or 12 weeks (Hatton et al, 1975).…”

mentioning

confidence: 99%

Treating `Primofiori' Lemons in Cold Storage with Intermittent Warming and Carbon Dioxide

Artés¹,

Escriche²,

Marin³

1993

HortSci

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Several intermittent 13C warming treatments were applied to `Primofiori' lemons (Citrus limon Burn) stored at 2 or SC. Fruit stored at 13C were treated with 10%, 2090, or 30% CO2 for 24 hours at weekly intervals. Reduction in decay and physiological disorders was best with two cycles of 2 weeks at 2C and 2 weeks at 13C and relative humidity >95 %. Under this storage condition, soluble solids concentration, pH, titratable acidity, and reducing sugars did not change relative to values at harvest, but the concentration of ascorbic acid increased and that of nonreducing sugars decreased in relation to harvest values. Carbon dioxide treatments did not prevent the development of alternaria (Alternaria citri Ell. & Pierce) rot and red blotch disorder, but effectively prevented the development of membranosis, rind pitting, and oleocellosis.

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Seasonal variability of the response of desert lemons to rind injury and decay caused by quarantine cold treatments

Cited by 17 publications

References 8 publications

Scoparone and Scopoletin Accumulation and Ultraviolet-C Induced Resistance to Postharvest Decay in Oranges as Influenced by Harvest Date

Scoparone and Scopoletin Accumulation and Ultraviolet-C Induced Resistance to Postharvest Decay in Oranges as Influenced by Harvest Date

`Eureka' Lemon Chilling Injury

Treating `Primofiori' Lemons in Cold Storage with Intermittent Warming and Carbon Dioxide

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