Non-destructive 1H-MRI assessment of flesh bruising in avocado (Persea americana M.) cv. Hass

Mazhar, M., Joyce, D., Cowin, G., Brereton, I., Hofman, P., Collins, R. and Gupta, M. (2015) Non-destructive 1H-MRI assessment of flesh bruising in avocado (Persea americana M.) cv. Hass. Postharvest Biology and Technology, 100 33-40. doi:10.1016/j.postharvbio.2014.09.006


Author Mazhar, M.
Joyce, D.
Cowin, G.
Brereton, I.
Hofman, P.
Collins, R.
Gupta, M.
Title Non-destructive 1H-MRI assessment of flesh bruising in avocado (Persea americana M.) cv. Hass
Formatted title
Non-destructive 1H-MRI assessment of flesh bruising in avocado (Persea americana M.) cv. Hass
Journal name Postharvest Biology and Technology   Check publisher's open access policy
ISSN 0925-5214
1873-2356
Publication date 2015-02-01
Year available 2014
Sub-type Article (original research)
DOI 10.1016/j.postharvbio.2014.09.006
Open Access Status Not yet assessed
Volume 100
Start page 33
End page 40
Total pages 8
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Language eng
Subject 1106 Food Science
1102 Agronomy and Crop Science
1108 Horticulture
Abstract Bruising of the mesocarp in avocado fruit is an important postharvest issue for the industry. Proton magnetic resonance imaging (H-1-MRI) was used as a non-destructive tool to monitor bruise expression over time in avocado cv. Hass fruit. H-1-MRI clearly identified fruit morphological features and bruised mesocarp tissue. The pixel intensity value of T-2 weighted spin echo H-1-MRI images of avocado fruit pericarp changed over time with fruit softening. Bruised mesocarp tissue in impacted fruit appeared relatively hyperintense (brighter) in T-2 weighted H-1-MRI images. For firm ripe fruit impacted from 25 cm drop height (0.38 J +/- 0.004) and for firm ripe fruit impacted from 50 cm drop height (0.81 J +/- 0.011), hyper-intensity in the mesocarp beneath the impact point was evident immediately after impact. However, visible symptoms of bruising in the form of flesh browning did not appear in parallel serial destructive assessments until after day 1 following impact on day 0. The brown, bruised mesocarp volume in ripe fruit increased progressively over the assessment period of 3 days. This trend was evident in destructive assessments as well as in H-1-MRI images. In hard green mature fruit impacted from 100 cm drop height (1.68 J +/- 0.020), contrast between mesocarp tissue beneath the impact site and surrounding sound mesocarp was evident in T-2 weighted H-1-MRI images from day 0. However, no bruise symptoms were evident as flesh browning upon serial destructive assessments of fruit over the 3 days assessment period. The average pixel intensity values at the impact site in T-2 weighted H-1-MRI images for both firm ripe and hard green mature fruit decreased over the period of assessment. In contrast, the pixel intensities in the T-2 weighted H-1-MRI images of diseased flesh increased over time. (C) 2014 Elsevier B.V. All rights reserved.
Formatted abstract
Bruising of the mesocarp in avocado fruit is an important postharvest issue for the industry. Proton magnetic resonance imaging (1H-MRI) was used as a non-destructive tool to monitor bruise expression over time in avocado cv. Hass fruit. 1H-MRI clearly identified fruit morphological features and bruised mesocarp tissue. The pixel intensity value of T2 weighted spin echo 1H-MRI images of avocado fruit pericarp changed over time with fruit softening. Bruised mesocarp tissue in impacted fruit appeared relatively hyperintense (brighter) in T2 weighted 1H-MRI images. For firm ripe fruit impacted from 25 cm drop height (0.38 J ± 0.004) and for firm ripe fruit impacted from 50 cm drop height (0.81 J ± 0.011), hyperintensity in the mesocarp beneath the impact point was evident immediately after impact. However, visible symptoms of bruising in the form of flesh browning did not appear in parallel serial destructive assessments until after day 1 following impact on day 0. The brown, bruised mesocarp volume in ripe fruit increased progressively over the assessment period of 3 days. This trend was evident in destructive assessments as well as in 1H-MRI images. In hard green mature fruit impacted from 100 cm drop height (1.68 J ± 0.020), contrast between mesocarp tissue beneath the impact site and surrounding sound mesocarp was evident in T2 weighted 1H-MRI images from day 0. However, no bruise symptoms were evident as flesh browning upon serial destructive assessments of fruit over the 3 days assessment period. The average pixel intensity values at the impact site in T2 weighted 1H-MRI images for both firm ripe and hard green mature fruit decreased over the period of assessment. In contrast, the pixel intensities in the T2 weighted 1H-MRI images of diseased flesh increased over time.
Keyword Fruit
Impact
Magnetic resonance imaging
Mechanical damage
Physical injury
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID AV10019
Institutional Status UQ
Additional Notes Available online 10 October 2014

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Agriculture and Food Sciences
Official 2015 Collection
Centre for Advanced Imaging Publications
 
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Created: Fri, 17 Oct 2014, 21:23:41 EST by Shona Osborne on behalf of Centre for Advanced Imaging