Bioactive compounds of grapefruit (Citrus paradisi cv. rio red) respond differently to postharvest irradiation, storage, and freeze drying

Jairam K.P. Vanamala, Greg Cobb, Nancy D. Turner, Joanne R. Lupton, Kil Sun Yoo, Leonard M. Pike, Bhimanagouda S. Patil

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

In the present study, the effect of irradiation, storage, and freeze drying on grapefruit bioactive compounds was investigated. Grapefruits were exposed to one of two irradiation doses: 0 (control) or 300 Gy ( 137Cs, a proposed treatment against fruit flies) and then stored for up to 6 days. At the last storage time point (6 days after harvest), grapefruit pulp from control and irradiated fruits was freeze-dried. Bioactive compounds were extracted from Rio Red grapefruit pulp and analyzed with reverse phase liquid chromatography while volatile compounds were analyzed using gas chromatography. Freeze-dried pulp from irradiated fruits had a higher (P ≤ 0.05) flavonoid content (naringin and narirutin) as compared to the freeze-dried pulp from the control fruits. Freeze-drying treatment reduced (P ≤ 0.05) the lycopene content, but the reduction (P ≤ 0.05) in β-carotene content occurred only in the control fruit. Reduction in d-limonene and myrcene was observed in the irradiated fruits at 6 days after harvest and in the freeze-dried samples. These results warrant testing of the effect of postharvest treatments and processing on bioactive compounds in functional systems as they have varied effects on different bioactive compounds of grapefruit.

Original languageEnglish (US)
Pages (from-to)3980-3985
Number of pages6
JournalJournal of agricultural and food chemistry
Volume53
Issue number10
DOIs
StatePublished - May 18 2005

Fingerprint

Citrus paradisi
Freeze Drying
grapefruits
freeze drying
Fruits
Fruit
Drying
irradiation
Irradiation
pulp
Pulp
fruits
naringin
postharvest treatment
myrcene
reversed-phase liquid chromatography
carotenes
lycopene
fruit flies
volatile compounds

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Agricultural and Biological Sciences(all)

Cite this

Vanamala, Jairam K.P. ; Cobb, Greg ; Turner, Nancy D. ; Lupton, Joanne R. ; Yoo, Kil Sun ; Pike, Leonard M. ; Patil, Bhimanagouda S. / Bioactive compounds of grapefruit (Citrus paradisi cv. rio red) respond differently to postharvest irradiation, storage, and freeze drying. In: Journal of agricultural and food chemistry. 2005 ; Vol. 53, No. 10. pp. 3980-3985.
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Bioactive compounds of grapefruit (Citrus paradisi cv. rio red) respond differently to postharvest irradiation, storage, and freeze drying. / Vanamala, Jairam K.P.; Cobb, Greg; Turner, Nancy D.; Lupton, Joanne R.; Yoo, Kil Sun; Pike, Leonard M.; Patil, Bhimanagouda S.

In: Journal of agricultural and food chemistry, Vol. 53, No. 10, 18.05.2005, p. 3980-3985.

Research output: Contribution to journalArticle

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