Abstract
Green lemons ( Citrus limon (L.) Burm.) were imaged for chlorophyll fluorescence (CF) 30 minutes after immersion of the fruit into 55 °C water for 5 minutes to determine if CF could be used to identify areas of hot water-induced rind injury before the appearance of visible symptoms. Fluorescence was variable in intensity over the surface of the rind with defined areas of enhanced fluorescence being present that corresponded in shape and location with visible injury that later developed during 24 hours of storage. Images showing minimum fluorescence (F 0 ) and maximal fluorescence (F m ) provided the best image contrast between injured and noninjured areas of the rind. Total F 0 present in the image was closely correlated ( r 2 = 0.87) with the area of rind injury present following storage. Holding the fruit under conditions of low humidity for 24 h before hot water treatment prevented both the formation of areas of enhanced fluorescence and the corresponding rind injury. Imaging of CF has potential as a means to identify areas of incipient rind injury in citrus to facilitate study of the causal mechanisms of postharvest rind disorders.
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Claims 4
Claim · model-written summary
Chlorophyll fluorescence images at minimum (F0) and maximal (Fm) fluorescence gave the best contrast between injured and noninjured lemon rind.
- Taxon
- Citrus limon
Citrus ×limone0 - Outcome
- image contraste1
- Comparator
- noninjured areas of the rinde1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Green lemons ( Citrus limon (L.) Burm.)”
e1“Images showing minimum fluorescence (F 0 ) and maximal fluorescence (F m ) provided the best image contrast between injured and noninjured areas of the rind”
Claim · model-written summary
Total F0 in the chlorophyll fluorescence image was closely correlated with the area of rind injury after storage (r2 = 0.87).
- Taxon
- Citrus limonCitrus ×limone0
- Organ / stage
- rinde2
- Outcome
- area of rind injurye2
- Qualifier
- Total F 0 present in the imagee2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Green lemons ( Citrus limon (L.) Burm.)”
e2“Total F 0 present in the image was closely correlated ( r 2 = 0.87) with the area of rind injury present following storage”
Claim · model-written summary
Holding lemons at low humidity for 24 h before hot water treatment prevented areas of enhanced fluorescence and the corresponding rind injury.
- Taxon
- Citrus limonCitrus ×limone0
- Treatment
- conditions of low humidity for 24 h before hot water treatmente3
- Outcome
- formation of areas of enhanced fluorescence and the corresponding rind injurye3
- Direction
- preventede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Green lemons ( Citrus limon (L.) Burm.)”
e3“Holding the fruit under conditions of low humidity for 24 h before hot water treatment prevented both the formation of areas of enhanced fluorescence and the corresponding rind injury”
Claim · model-written summary
Areas of enhanced chlorophyll fluorescence corresponded in shape and location with rind injury that developed later during 24 h of storage.
- Taxon
- Citrus limonCitrus ×limone0
- Outcome
- areas of enhanced fluorescencee4
- Qualifier
- corresponded in shape and location with visible injury that later developed during 24 hours of storagee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Green lemons ( Citrus limon (L.) Burm.)”
e4“defined areas of enhanced fluorescence being present that corresponded in shape and location with visible injury that later developed during 24 hours of storage”
The same questions in other papers
heat · crop injury · Citrus x limon (lemon)Positive and negative results
4 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- positive
2 papers more in this group
See all 6 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.