Abstract
Summary. The ability of unripe bananas to synthesize ethylene is dependent on the oxygen tension of the atmosphere surrounding the fruit. Unripe bananas do not synthesize significant amounts of ethylene at 18°C unless the oxygen tension is above 7–8.0%. At oxygen tensions of 10–13% synthesis does occur but it is delayed compared with fruit in the air. It has been demonstrated that delay in the onset of the ripening syndrome occasioned by holding fruit in 5–7.5% oxygen is caused by their inability to synthesize ethylene. The ripening syndrome may, however, be initiated even in atmospheres of low oxygen by the inclusion of exogenous ethylene in physiological concentrations. Once the synthesis is initiated, the fruit are capable of producing ethylene even in atmospheres of low oxygen.
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Claims 6
Claim · model-written summary
Ethylene synthesis in unripe bananas depends on atmospheric oxygen tension.
Not reportedDirection
Verbatim
e0“The ability of unripe bananas to synthesize ethylene is dependent on the oxygen tension of the atmosphere surrounding the fruit.”
Claim · model-written summary
At 18°C, unripe bananas lack significant ethylene synthesis unless oxygen exceeds 7–8.0%.
Verbatim
e0“Unripe bananas do not synthesize significant amounts of ethylene at 18°C unless the oxygen tension is above 7–8.0%.”
Claim · model-written summary
At 10–13% oxygen, ethylene synthesis is delayed compared with air.
Verbatim
e0“At oxygen tensions of 10–13% synthesis does occur but it is delayed compared with fruit in the air.”
t0“banana fruit”
Claim · model-written summary
Holding banana fruit at 5–7.5% oxygen delays ripening through inability to synthesize ethylene.
Verbatim
e0“delay in the onset of the ripening syndrome occasioned by holding fruit in 5–7.5% oxygen is caused by their inability to synthesize ethylene.”
t0“banana fruit”
Claim · model-written summary
Exogenous ethylene initiates ripening even at low oxygen.
- Taxon
- bananat0
- Treatment
- inclusion of exogenous ethylene in physiological concentrationse0
- Outcome
- ripening syndromee0
- Qualifier
- atmospheres of low oxygene0
Not reportedComparatorDirection
Verbatim
e0“The ripening syndrome may, however, be initiated even in atmospheres of low oxygen by the inclusion of exogenous ethylene in physiological concentrations.”
t0“banana fruit”
Claim · model-written summary
Once initiated, ethylene production continues under low oxygen.
Verbatim
e0“Once the synthesis is initiated, the fruit are capable of producing ethylene even in atmospheres of low oxygen.”
t0“banana fruit”
The same questions in other papers
ethene · quality: postharvest · MusaPositive and negative results
24 papers in the same direction as this paper · 7 in the opposite direction · 2 reporting no difference from an alternative
- negative
- negative
- no effect
30 papers more in this group
See all 34 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.