Abstract
ABSTRACT: Chitosan (2%) ‐based or hydroxypropyl methylcellulose (HPMC) (1%) ‐based coatings were applied on fresh strawberries to evaluate their antifungal efficacies against Cladosporium sp. and Rhizopus sp. Potassium sorbate (PS) was also incorporated into coating formulas to evaluate any additional inhibitory effects on mold inhibition. Strawberries were inoculated with Cladosporium sp. or Rhizopus sp. at a level of approximately 10 3 log colony‐forming units (CFU) /g, coated with 2% chitosan, 2% chitosan containing 0.3% PS, or 1% HPMC containing 0.3% PS, and stored at about 5°C and about 50% RH up to 23 d for enumeration of mold, yeast, total aerobes, and coli forms. To assess antifungal activity of the coating materials in vitro, coating solutions were embedded into agar plates and the diameters of radial mold growth were measured after inoculation. In addition, weight loss of coated strawberries and water vapor permeability of the coatings were measured. No significant combined inhibitory effects between chitosan and PS on fungal growth on fresh strawberries were detected. However, significant combined inhibition activity was observed in in vitro testing when PS was formulated into chitosan. Antifungal activity of chitosan against Cladosporium sp. and Rhizopus sp. was not affected by the autoclaving process of coating solutions. Coating treatment also reduced total aerobic count, coliforms, and weight loss of strawberries during storage. Hence, chitosan can be used as a natural antimicrobial coating on fresh strawberries to control the growth of fungi, thus extending shelf‐life of the fruits.
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Claims 7
Claim · model-written summary
Adding potassium sorbate to chitosan did not significantly increase fungal inhibition on fresh strawberries.
- Taxon
- strawberries
_single2.jpg?width=60)
Fragaria ×ananassae0 - Treatment
- chitosan and PSe0
- Outcome
- fungal growthe0
- Direction
- No significant combined inhibitory effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_single2.jpg?width=500)
Verbatim
e0“No significant combined inhibitory effects between chitosan and PS on fungal growth on fresh strawberries were detected.”
Claim · model-written summary
Potassium sorbate formulated into chitosan showed significant combined fungal inhibition in vitro.
- Taxon
- StrawberriesFragaria ×ananassat0
- Treatment
- PS was formulated into chitosane0
- Outcome
- combined inhibition activitye0
- Direction
- inhibitione0
- Setting
- in vitroe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant combined inhibition activity was observed in in vitro testing when PS was formulated into chitosan”
t0“Strawberries ( Fragaria × ananassa )”
Claim · model-written summary
Autoclaving coating solutions did not alter chitosan antifungal activity against Cladosporium sp.
- Taxon
- StrawberriesFragaria ×ananassat0
- Treatment
- autoclaving process of coating solutionse0
- Interactor
- Cladosporium sp.
Cladosporiume0pathogen - Outcome
- Antifungal activity of chitosan against Cladosporium sp.e0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Antifungal activity of chitosan against Cladosporium sp. and Rhizopus sp. was not affected by the autoclaving process of coating solutions.”
t0“Strawberries ( Fragaria × ananassa )”
Claim · model-written summary
Autoclaving coating solutions did not alter chitosan antifungal activity against Rhizopus sp.
- Taxon
- StrawberriesFragaria ×ananassat0
- Treatment
- autoclaving process of coating solutionse0
- Outcome
- Antifungal activity of chitosane0
- Direction
- not affectede0
_spores%2C_which_is_green_using_Light_Microscope%2C_Normal_image_without_any_coloring_or_processing_By_researcher_El_sayed_Al_gayar%2C_Faculty_of_Agriculture_Damietta_University.jpg?width=60){kind=small}
RhizopusNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_spores%2C_which_is_green_using_Light_Microscope%2C_Normal_image_without_any_coloring_or_processing_By_researcher_El_sayed_Al_gayar%2C_Faculty_of_Agriculture_Damietta_University.jpg?width=500)
Verbatim
e0“Antifungal activity of chitosan against Cladosporium sp. and Rhizopus sp. was not affected by the autoclaving process of coating solutions.”
t0“Strawberries ( Fragaria × ananassa )”
Claim · model-written summary
Coating treatment reduced total aerobic count and coliforms on strawberries during storage.
- Taxon
- strawberriesFragaria ×ananassae0
- Treatment
- Coating treatmente0
- Outcome
- total aerobic count, coliformse0
- Direction
- reducede0
- Qualifier
- during storagee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Coating treatment also reduced total aerobic count, coliforms, and weight loss of strawberries during storage.”
Claim · model-written summary
Coating treatment reduced strawberry weight loss during storage.
- Taxon
- strawberriesFragaria ×ananassae0
- Treatment
- Coating treatmente0
- Outcome
- weight losse0
- Direction
- reducede0
- Qualifier
- during storagee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Coating treatment also reduced total aerobic count, coliforms, and weight loss of strawberries during storage.”
Claim · model-written summary
The authors propose chitosan as a natural antimicrobial strawberry coating to control fungi and extend fruit shelf life.
- Taxon
- strawberriesFragaria ×ananassae0
- Treatment
- chitosane0
- Outcome
- control the growth of fungi, thus extending shelf‐life of the fruitse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chitosan can be used as a natural antimicrobial coating on fresh strawberries to control the growth of fungi, thus extending shelf‐life of the fruits.”
The same questions in other papers
chitosan · disease · Fragaria x ananassa (strawberry)Results differ
41 papers in the same direction as this paper · 1 in the opposite direction
- positive
- positive
- negative
39 papers more in this group
See all 43 papers →potassium sorbate · disease · Fragaria x ananassa (strawberry)Results agree
1 paper in the same direction as this paper
- positive
storage · quality: postharvest · Fragaria x ananassa (strawberry)Positive and negative results
116 papers in the same direction as this paper · 4 in the opposite direction
- positive
- positive
- positive
117 papers more in this group
See all 121 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.