Abstract
Loss of sugars contributes to accelerate postharvest senescence of broccoli. Several treatments have been developed to delay senescence, but in many cases their effects on sugar metabolism were not analyzed. We studied the effect of harvest at different times of day (08:00, 13:00 and 18:00 h) and of several postharvest treatments as heat treatment (HT), modified atmosphere (MA) and 1-methylcylcopropene (1-MCP) on sugar levels and activities of enzymes related to sucrose and starch degradation. Harvesting at the end of day delayed the loss of chlorophylls and caused the lowest decrement in sugars, although no differences in invertase, sucrose synthase and β-amylase activities were detected among samples. Treatments of MA and 1-MCP caused a lower loss of glucose and fructose, while HT caused a lower decrement of sucrose. Treated samples maintained higher levels of chlorophylls. The treatments reduced the activity of invertase and sucrose synthase and induced higher levels of β-amylase activity. Harvesting at the end of day and performing simultaneously a MA treatment could be a good combination to maintain the green color of the inflorescence and sugar levels during postharvest of broccoli.
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Claims 10
Claim · model-written summary
End-of-day harvest delayed chlorophyll loss.
- Taxon
- broccoli
Brassica oleracea var. italicat0 - Treatment
- Harvesting at the end of daye0
- Outcome
- loss of chlorophyllse0
- Direction
- delayede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Harvesting at the end of day delayed the loss of chlorophylls”
t0“broccoli (Brassica oleracea var. italica)”
Claim · model-written summary
End-of-day harvest caused the smallest sugar decline.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Treatment
- Harvesting at the end of daye0
- Outcome
- sugarse0
- Direction
- lowest decremente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Harvesting at the end of day delayed the loss of chlorophylls and caused the lowest decrement in sugars”
t0“broccoli (Brassica oleracea var. italica)”
Claim · model-written summary
Invertase, sucrose synthase and beta-amylase activities did not differ among harvest-time samples.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Outcome
- invertase, sucrose synthase and β-amylase activitiese0
- Direction
- no differencese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no differences in invertase, sucrose synthase and β-amylase activities were detected among samples”
t0“broccoli (Brassica oleracea var. italica)”
Claim · model-written summary
Modified atmosphere caused lower glucose and fructose loss.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Treatment
- MAe0
- Outcome
- loss of glucose and fructosee0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatments of MA and 1-MCP caused a lower loss of glucose and fructose”
t0“broccoli (Brassica oleracea var. italica)”
Claim · model-written summary
1-MCP caused lower glucose and fructose loss.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Treatment
- 1-MCPe0
- Outcome
- loss of glucose and fructosee0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatments of MA and 1-MCP caused a lower loss of glucose and fructose”
t0“broccoli (Brassica oleracea var. italica)”
Claim · model-written summary
Heat treatment caused a lower sucrose decline.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Treatment
- HTe0
- Outcome
- sucrosee0
- Direction
- lower decremente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“HT caused a lower decrement of sucrose”
t0“broccoli (Brassica oleracea var. italica)”
Claim · model-written summary
Treated broccoli retained higher chlorophyll levels.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Treatment
- Treatede0
- Outcome
- levels of chlorophyllse0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treated samples maintained higher levels of chlorophylls”
t0“broccoli (Brassica oleracea var. italica)”
Claim · model-written summary
Postharvest treatments reduced invertase and sucrose synthase activity.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Treatment
- treatmentse0
- Outcome
- activity of invertase and sucrose synthasee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The treatments reduced the activity of invertase and sucrose synthase”
t0“broccoli (Brassica oleracea var. italica)”
Claim · model-written summary
Postharvest treatments increased beta-amylase activity.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Treatment
- treatmentse0
- Outcome
- β-amylase activitye0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The treatments reduced the activity of invertase and sucrose synthase and induced higher levels of β-amylase activity”
t0“broccoli (Brassica oleracea var. italica)”
Claim · model-written summary
The authors recommend combining end-of-day harvest with modified atmosphere to preserve inflorescence color and sugars.
- Taxon
- broccoliBrassica oleracea var. italicae0
- Treatment
- Harvesting at the end of day and performing simultaneously a MA treatmente0
- Outcome
- maintain the green color of the inflorescence and sugar levelse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Harvesting at the end of day and performing simultaneously a MA treatment could be a good combination to maintain the green color of the inflorescence and sugar levels during postharvest of broccoli”
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See all 13 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.