New Zealand Journal of Crop and Horticultural Science abstracts
Short communication
Nuclear magnetic resonance imaging of the development of chilling injury in
`Fuyu' persimmon (Diospyros kaki )
C. J. CLARK
The Horticulture and Food Research Institute
of New Zealand
Ruakura Research Centre
Private Bag 3123
Hamilton, New Zealand
S. K. FORBES
The Horticulture and Food Research Institute
of New Zealand
Mt Albert Research Centre
Private Bag 92169
Auckland, New Zealand
Abstract Development of chilling injury in individual
persimmon fruit was monitored over a 7-week period using nuclear magnetic
resonance (NMR) imaging. At commercial harvest, fruit of the non-astringent
cultivar, `Fuyu', were divided into two treatments--one in which samples were
sealed in individual polyethylene bags, and another without bags (control).
Storage conditions were 0deg.C for 6 weeks. Proton NMR images (0.39 mm
resolution) of transverse and longitudinal sections were obtained weekly using
a standard Hahn spin-echo pulse sequence (TE = 30 ms, TR = 500 ms) on a 0.5
Tesla whole-body scanner. There was limited NMR evidence to support development
of chilling injury in fruit from either treatment during cold storage. After
removal to ambient temperatures however, injury developed rapidly causing fruit
to be inedible within 1 week. Changes observed non-invasively during the period
of degradation were consistent with visual observations describing the
development of the disorder in this crop.
Keywords chilling injury; Diospyros kaki; fruit;
magnetic resonance imaging; NMR; non-destructive analysis; persimmon;
physiological disorders; postharvest storage
PDF file of entire paper: medium quality (926K); (scanned from paper original: notes about this process)
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