Abstract
The use of hazardous formalin in increasing shelf life of fruits and protecting them from microbial decay by unscrupulous traders is a big health concern for the consumers in Bangladesh. Chitosan is a natural biopolymer produced from the exoskeletons of shrimp and crab, which slows antimicrobial activities and induces immunity of plants against microbial pests. This study aimed to evaluate the efficacy of chitosan on the shelf life extension of some local ripened fruits compared to untreated control. Three doses of chitosan solution viz. 0, 500 and 1000 ppm were sprayed in alternate day on banana (cvs. Shabri and Champa), strawberry, tomato, and oranges. It revealed that chitosan extended shelf life of all fruits by delaying the decay; however, level of protection varied in different kinds of fruits as well as in doses of the chitosan used. Among the tested fruits, decay of tomatoes was most delayed by chitosan. Spraying of both 500 and 1000 ppm of chitosan equally protected 100% decay in tomatoes until 8 days of treatments at room temperature. More than 80% protection of other fruits viz. banana, orange and strawberries by chitosan were recorded at 8, 8 and 4 day after treatment, respectively, which were remarkably higher than the untreated control. Interestingly, 500 ppm of chitosan spray gave better protection than 1000 ppm in all the tested fruits. These results suggest that lower doses of chitosan can be utilized as a natural preservative of fruits alternative to hazardous formalin. A further study with higher number of fruits, and at varying temperature and chitosan doses are needed for recommending it for practical application as a fruit preservative.
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Claims 8
Claim · model-written summary
Chitosan delayed decay and extended shelf life of the tested fruits.
Not reportedComparator
Verbatim
e0“chitosan extended shelf life of all fruits by delaying the decay”
e1“banana (cvs. Shabri and Champa), strawberry, tomato, and oranges”
Claim · model-written summary
Tomato decay was most delayed by chitosan among tested fruits.
- Taxon
- tomatoes
Solanum lycopersicume0 - Treatment
- chitosane0
- Outcome
- decay of tomatoese0
- Direction
- most delayede0
- Comparator
- tested fruitse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Among the tested fruits, decay of tomatoes was most delayed by chitosan”
e1“strawberry, tomato, and oranges”
Claim · model-written summary
Both 500 and 1000 ppm chitosan prevented tomato decay through day 8 at room temperature.
- Taxon
- tomatoesSolanum lycopersicume0
- Treatment
- both 500 and 1000 ppm of chitosane0
- Outcome
- decay in tomatoese0
- Direction
- protectede0
- Value
- 100%e0
- Qualifier
- until 8 days of treatmentse0
- Setting
- room temperaturee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spraying of both 500 and 1000 ppm of chitosan equally protected 100% decay in tomatoes until 8 days of treatments at room temperature”
Claim · model-written summary
Chitosan protected over 80% of banana fruits at day 8 versus untreated controls.
Verbatim
e0“More than 80% protection of other fruits viz. banana, orange and strawberries by chitosan were recorded at 8, 8 and 4 day after treatment, respectively, which were remarkably higher than the untreated control”
Claim · model-written summary
Chitosan protected over 80% of oranges at day 8 versus untreated controls.
Verbatim
e0“More than 80% protection of other fruits viz. banana, orange and strawberries by chitosan were recorded at 8, 8 and 4 day after treatment, respectively, which were remarkably higher than the untreated control”
Claim · model-written summary
Chitosan protected over 80% of strawberries at day 4 versus untreated controls.
- Taxon
- strawberries
_single2.jpg?width=60)
Fragaria ×ananassae0 - Treatment
- chitosane0
- Outcome
- protection of other fruitse0
- Direction
- highere0
- Value
- More than 80%e0
- Qualifier
- 8, 8 and 4 day after treatmente0
- Comparator
- untreated controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_single2.jpg?width=500)
Verbatim
e0“More than 80% protection of other fruits viz. banana, orange and strawberries by chitosan were recorded at 8, 8 and 4 day after treatment, respectively, which were remarkably higher than the untreated control”
Claim · model-written summary
The 500 ppm chitosan dose gave better protection than 1000 ppm in all tested fruits.
Verbatim
e0“500 ppm of chitosan spray gave better protection than 1000 ppm in all the tested fruits”
e1“banana (cvs. Shabri and Champa), strawberry, tomato, and oranges”
Claim · model-written summary
Authors suggest lower chitosan doses as a fruit preservative alternative to formalin.
Verbatim
e0“lower doses of chitosan can be utilized as a natural preservative of fruits alternative to hazardous formalin”
e1“banana (cvs. Shabri and Champa), strawberry, tomato, and oranges”
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