Abstract
Fruit softening is an inevitable event during ripening of red raspberry fruit even when stored at low temperature. In this research, the effects of CaCl2 treatment on softening of red raspberry during storage at 4°C were studied. The results indicated that CaCl2 treatment effectively delayed the decrease of firmness and reduced the respiration rate of red raspberry fruit during storage. The CaCl2-treated fruit maintained higher protopectin content and lower soluble pectin content compared with controls. The cellulose and starch contents in the fruit treated with CaCl2 kept higher than in the control during storage. Moreover, CaCl2 treatment decreased activities of polygalacturonase (PG), pectin methylesterase (PME), and cellulase (Cx) mainly at the early stage of softening. Application of CaCl2 lead to the decreased activities of amylase (AM) and β-galactosidase (β-gal) compared with controls during the entire storage periods. These results indicated that CaCl2 treatment might delay postharvest softening of red raspberry fruit stored at low-temperature by retarding cell wall degradation and starch hydrolysis. Practical applications Red raspberry fruit is very popular with consumers because of its high-nutritional value and anticancer effects. However, it has a very short postharvest life and softens easily even when stored at low temperature, which limits its distribution to distant market. Our data indicated that CaCl2 treatment delayed postharvest softening of red raspberry fruit stored at low temperature. The results could provide preliminary yet essential information to research community to further study the molecular mechanisms of softening in red raspberry fruit, and also provide reference data for maintaining quality of postharvest red raspberry fruit.
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Claims 9
Claim · model-written summary
CaCl2 delayed firmness loss during storage.
- Taxon
- red raspberry
_Rubus_idaeus_-_Feuillage.jpg?width=60)
Rubus idaeuse0 - Treatment
- CaCl2 treatmente0
- Outcome
- firmnesse0
- Direction
- delayed the decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Rubus_idaeus_-_Feuillage.jpg?width=500)
Verbatim
e0“CaCl2 treatment effectively delayed the decrease of firmness and reduced the respiration rate of red raspberry fruit during storage”
Claim · model-written summary
CaCl2 reduced fruit respiration rate during storage.
- Taxon
- red raspberryRubus idaeuse0
- Treatment
- CaCl2 treatmente0
- Outcome
- respiration ratee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CaCl2 treatment effectively delayed the decrease of firmness and reduced the respiration rate of red raspberry fruit during storage”
Claim · model-written summary
CaCl2-treated fruit had higher protopectin content than controls.
- Taxon
- red raspberryRubus idaeust0
- Treatment
- CaCl2-treatede0
- Outcome
- protopectin contente0
- Direction
- highere0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“red raspberry fruit”
e0“The CaCl2-treated fruit maintained higher protopectin content and lower soluble pectin content compared with controls”
Claim · model-written summary
CaCl2-treated fruit had lower soluble pectin content than controls.
- Taxon
- red raspberryRubus idaeust0
- Treatment
- CaCl2-treatede0
- Outcome
- soluble pectin contente0
- Direction
- lowere0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“red raspberry fruit”
e0“The CaCl2-treated fruit maintained higher protopectin content and lower soluble pectin content compared with controls”
Claim · model-written summary
CaCl2-treated fruit retained higher cellulose content than controls.
- Taxon
- red raspberryRubus idaeust0
- Treatment
- treated with CaCl2e0
- Outcome
- cellulosee0
- Direction
- highere0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“red raspberry fruit”
e0“The cellulose and starch contents in the fruit treated with CaCl2 kept higher than in the control during storage”
Claim · model-written summary
CaCl2-treated fruit retained higher starch content than controls.
- Taxon
- red raspberryRubus idaeust0
- Treatment
- treated with CaCl2e0
- Outcome
- starch contentse0
- Direction
- highere0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“red raspberry fruit”
e0“The cellulose and starch contents in the fruit treated with CaCl2 kept higher than in the control during storage”
Claim · model-written summary
CaCl2 reduced PG, PME and Cx activities mainly early in softening.
- Taxon
- red raspberryRubus idaeust0
- Treatment
- CaCl2 treatmente0
- Outcome
- activities of polygalacturonase (PG), pectin methylesterase (PME), and cellulase (Cx)e0
- Direction
- decreasede0
- Qualifier
- mainly at the early stage of softeninge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“red raspberry fruit”
e0“CaCl2 treatment decreased activities of polygalacturonase (PG), pectin methylesterase (PME), and cellulase (Cx) mainly at the early stage of softening”
Claim · model-written summary
CaCl2 reduced AM and β-gal activities throughout storage relative to controls.
- Taxon
- red raspberryRubus idaeust0
- Treatment
- CaCl2e0
- Outcome
- activities of amylase (AM) and β-galactosidase (β-gal)e0
- Direction
- decreasede0
- Qualifier
- during the entire storage periodse0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“red raspberry fruit”
e0“Application of CaCl2 lead to the decreased activities of amylase (AM) and β-galactosidase (β-gal) compared with controls during the entire storage periods”
Claim · model-written summary
The authors suggest CaCl2 may delay softening by retarding cell wall degradation and starch hydrolysis.
- Taxon
- red raspberryRubus idaeuse0
- Treatment
- CaCl2 treatmente0
- Outcome
- postharvest softeninge0
- Qualifier
- by retarding cell wall degradation and starch hydrolysise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CaCl2 treatment might delay postharvest softening of red raspberry fruit stored at low-temperature by retarding cell wall degradation and starch hydrolysis”
The same questions in other papers
calcium chloride dihydrate · molecular: metabolites · Rubus idaeus (red raspberry)Results agree
2 papers in the same direction as this paper
- positive
- positive
calcium chloride dihydrate · quality: postharvest · Rubus idaeus (red raspberry)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
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.