Abstract
Guava (Psidium guajava L.) is a tropical fruit exhibiting rapid post-harvest ripening. However, the physiological basis involved in the ripening process of guava is not totally clear, which makes it difficult to develop technologies to enhance fruit storability. Two experiments were carried out with the objective of determining the ripening behavior of 'Pedro Sato' guavas. In the first experiment, guava fruits at three maturity stages (I - dark green, II - light green and III - yellow-green) were stored at room temperature (23 ± 1°C and 85 ± 5 % RH). The respiratory rate, ethylene production, pulp and skin colours, and firmness were evaluated. In the second experiment, ethylene and 1-methylcyclopropene (1-MCP) were applied to guavas at the light green maturity stage and the ripening behaviour during storage at room temperature was studied. Fruits from all maturity stages showed a gradual increase in the respiratory rate and ethylene production. The intense changes in pulp and skin colours and in firmness preceded the maximum respiratory rate and ethylene production. 1-MCP reduced the rate of ripening, while the application of ethylene did not promote this process. These results do not permit the classification of 'Pedro Sato' guava as a traditional climacteric fruit.
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Claims 4
Claim · model-written summary
Respiratory rate and ethylene production of guava fruits increased gradually at all maturity stages during room-temperature storage.
- Taxon
- Psidium guajava L.
Psidium guajavae0 - Organ / stage
- Fruitse1
- Outcome
- respiratory rate and ethylene productione1
- Direction
- gradual increasee1
- Setting
- room temperaturee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Ripening of "Pedro Sato" guava”
e0“Guava (Psidium guajava L.) is a tropical fruit exhibiting rapid post-harvest ripening”
e1“Fruits from all maturity stages showed a gradual increase in the respiratory rate and ethylene production”
e2“were stored at room temperature (23 ± 1°C and 85 ± 5 % RH)”
Claim · model-written summary
Changes in pulp and skin colour and firmness preceded the maximum respiratory rate and ethylene production.
- Taxon
- Psidium guajava L.Psidium guajavae0
- Outcome
- changes in pulp and skin colours and in firmnesse3
- Qualifier
- preceded the maximum respiratory rate and ethylene productione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Ripening of "Pedro Sato" guava”
e0“Guava (Psidium guajava L.) is a tropical fruit exhibiting rapid post-harvest ripening”
e3“The intense changes in pulp and skin colours and in firmness preceded the maximum respiratory rate and ethylene production”
Claim · model-written summary
1-MCP reduced the rate of ripening of guava fruit.
- Taxon
- Psidium guajava L.Psidium guajavae0
- Treatment
- 1-methylcyclopropene (1-MCP)e4
- Outcome
- rate of ripeninge5
- Direction
- reducede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Ripening of "Pedro Sato" guava”
e0“Guava (Psidium guajava L.) is a tropical fruit exhibiting rapid post-harvest ripening”
e4“ethylene and 1-methylcyclopropene (1-MCP) were applied to guavas at the light green maturity stage”
e5“1-MCP reduced the rate of ripening, while the application of ethylene did not promote this process”
Claim · model-written summary
Application of ethylene did not promote ripening of guava fruit.
- Taxon
- Psidium guajava L.Psidium guajavae0
- Treatment
- application of ethylenee5
- Outcome
- ripeninge5
- Direction
- did not promotee5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Ripening of "Pedro Sato" guava”
e0“Guava (Psidium guajava L.) is a tropical fruit exhibiting rapid post-harvest ripening”
e5“1-MCP reduced the rate of ripening, while the application of ethylene did not promote this process”
The same questions in other papers
1-methylcyclopropene · quality: postharvest · Psidium guajava (guava)Results differ
11 papers in the same direction as this paper · 1 in the opposite direction · 1 reporting no difference from an alternative
- positive
- positive
- positive
10 papers more in this group
See all 14 papers →ethene · quality: postharvest · Psidium guajava (guava)Results agree
1 paper in the same direction as this paper
- no effect
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.