Cj. Clark et Sk. Forbes, NUCLEAR-MAGNETIC-RESONANCE IMAGING OF THE DEVELOPMENT OF CHILLING INJURY IN FUYU PERSIMMON (DIOSPYROS-KAKI), New Zealand journal of crop and horticultural science, 22(2), 1994, pp. 209-215
Development of chilling injury in individual persimmon fruit was monit
ored over a 7-week period using nuclear magnetic resonance (NMR) imagi
ng. At commercial harvest, fruit of the non-astringent cultivar, 'Fuyu
', were divided into two treatments-one in which samples were sealed i
n individual polyethylene bags, and another without bags (control). St
orage conditions were 0-degrees-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 (T(E) = 30 ms, T
(R) = 500 ms) on a 0.5 Tesla whole-body scanner. There was limited NMR
evidence to support development of chilling injury in fruit from eith
er treatment during cold storage. After removal to ambient temperature
s however, injury developed rapidly causing fruit to be inedible withi
n 1 week. Changes observed non-invasively during the period of degrada
tion were consistent with visual observations describing the developme
nt of the disorder in this crop.