Abstract
Guava (Psidium guajava L.) is a climacteric fruit characterised by sustained ethylene production even after ripening, which induces rapid physiological and biochemical changes, thereby reducing shelf-life and increasing susceptibility to chilling injury and microbial spoilage during storage. This underlines the imperative need for an innovative method to overcome postharvest losses. This work attempts to bridge the research gaps to improve the post-harvest shelf life and improve the quality attributes of guava fruits by coating it with different polymers imbedded with antimicrobial silver nanoparticles (AgNPs). The antimicrobial efficiency of AgNPs peaked at the concentration of 100 µg mL-1 with the inhibition zone of 33 mm against postharvest pathogen Aspergillus flavus using agar well diffusion method. Biopolymer coatings like beeswax, xanthan gum, gelatin and guar gum which are naturally available, edible and eco-friendly, act as an impervious barrier against water loss, improve the peel coloration and maintain the firmness and texture. These AgNPs imbedded biopolymer coatings created an immense impact on post-harvest quality attributes like titratable acidity (TA), reducing and non-reducing sugars. The best results were observed in the T2 (Beeswax + AgNPs) as revealed by the highest TA of 0.38 %, lowest decay rate of 60 % and lowest reducing and non-reducing sugars of 3.02 % and 2.65 % on the 12th day after imposing the treatments. These coatings not only act as a barrier against water loss but also reduce respiration, slow down the metabolic rate, and prevent microbial decay, which leads to a better acid–sugar balance, thereby imparting improved sensory attributes.
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Claims 8
Claim · model-written summary
The antimicrobial efficiency of AgNPs peaked at 100 µg mL-1, giving a 33 mm inhibition zone against the postharvest pathogen Aspergillus flavus in agar well diffusion.
- Taxon
- Aspergillus flavus
Aspergillus flavuse0 - Treatment
- AgNPse0
- Interactor
- Aspergillus flavusAspergillus flavuse0pathogen
- Outcome
- inhibition zonee0
- Value
- 33 mme0
- Qualifier
- peaked at the concentration of 100 µg mL-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The antimicrobial efficiency of AgNPs peaked at the concentration of 100 µg mL-1 with the inhibition zone of 33 mm against postharvest pathogen Aspergillus flavus using agar well diffusion method”
Claim · model-written summary
Guava fruit coated with beeswax plus AgNPs (T2) had the highest titratable acidity, 0.38 %, on day 12 after treatment.
- Taxon
- guava
Psidium guajavat0 - Treatment
- T2 (Beeswax + AgNPs)e0
- Outcome
- TAe0
- Direction
- higheste0
- Value
- 0.38 %e0
- Qualifier
- on the 12th day after imposing the treatmentse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“guava”
e0“T2 (Beeswax + AgNPs) as revealed by the highest TA of 0.38 %, lowest decay rate of 60 % and lowest reducing and non-reducing sugars of 3.02 % and 2.65 % on the 12th day after imposing the treatments”
Claim · model-written summary
Guava fruit coated with beeswax plus AgNPs (T2) had the lowest decay rate, 60 %, on day 12 after treatment.
- Taxon
- guavaPsidium guajavat0
- Treatment
- T2 (Beeswax + AgNPs)e0
- Outcome
- decay ratee0
- Direction
- loweste0
- Value
- 60 %e0
- Qualifier
- on the 12th day after imposing the treatmentse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“guava”
e0“T2 (Beeswax + AgNPs) as revealed by the highest TA of 0.38 %, lowest decay rate of 60 % and lowest reducing and non-reducing sugars of 3.02 % and 2.65 % on the 12th day after imposing the treatments”
Claim · model-written summary
Guava fruit coated with beeswax plus AgNPs (T2) had the lowest reducing sugars, 3.02 %, on day 12 after treatment.
- Taxon
- guavaPsidium guajavat0
- Treatment
- T2 (Beeswax + AgNPs)e0
- Outcome
- reducinge0
- Direction
- loweste0
- Value
- 3.02 %e0
- Qualifier
- reducing sugarse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“guava”
e0“T2 (Beeswax + AgNPs) as revealed by the highest TA of 0.38 %, lowest decay rate of 60 % and lowest reducing and non-reducing sugars of 3.02 % and 2.65 % on the 12th day after imposing the treatments”
Claim · model-written summary
Guava fruit coated with beeswax plus AgNPs (T2) had the lowest non-reducing sugars, 2.65 %, on day 12 after treatment.
- Taxon
- guavaPsidium guajavat0
- Treatment
- T2 (Beeswax + AgNPs)e0
- Outcome
- non-reducing sugarse0
- Direction
- loweste0
- Value
- 2.65 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“guava”
e0“T2 (Beeswax + AgNPs) as revealed by the highest TA of 0.38 %, lowest decay rate of 60 % and lowest reducing and non-reducing sugars of 3.02 % and 2.65 % on the 12th day after imposing the treatments”
Claim · model-written summary
Biopolymer coatings (beeswax, xanthan gum, gelatin, guar gum) improved peel coloration of guava.
- Taxon
- guavaPsidium guajavat0
- Treatment
- Biopolymer coatings like beeswax, xanthan gum, gelatin and guar gume0
- Outcome
- peel coloratione0
- Direction
- improvee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“guava”
e0“Biopolymer coatings like beeswax, xanthan gum, gelatin and guar gum which are naturally available, edible and eco-friendly, act as an impervious barrier against water loss, improve the peel coloration”
Claim · model-written summary
Biopolymer coatings (beeswax, xanthan gum, gelatin, guar gum) maintained firmness and texture of guava.
- Taxon
- guavaPsidium guajavat0
- Treatment
- Biopolymer coatings like beeswax, xanthan gum, gelatin and guar gume0
- Outcome
- firmness and texturee0
- Direction
- maintaine0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“guava”
e0“Biopolymer coatings like beeswax, xanthan gum, gelatin and guar gum which are naturally available, edible and eco-friendly, act as an impervious barrier against water loss, improve the peel coloration and maintain the firmness and texture”
Claim · model-written summary
The authors attribute the better acid-sugar balance of coated guava to coatings acting as a barrier against water loss, reducing respiration, slowing metabolic rate and preventing microbial decay.
- Taxon
- guavaPsidium guajavat0
- Treatment
- These coatingse0
- Outcome
- better acid–sugar balancee0
- Qualifier
- reduce respiration, slow down the metabolic rate, and prevent microbial decaye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“guava”
e0“These coatings not only act as a barrier against water loss but also reduce respiration, slow down the metabolic rate, and prevent microbial decay, which leads to a better acid–sugar balance”
The same questions in other papers
gelatin · quality: postharvest · Psidium guajava (guava)Results agree
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1 paper in the same direction as this paper
- positive
9H-xanthene · quality: postharvest · Psidium guajava (guava)Results agree
2 papers in the same direction as this paper
- 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.