Abstract
The importance of light intensity and spectral quality on fruit color and shelf life of long English cucumber ( Cucumis sativus L.) was studied in four greenhouse experiments. The intensity of cucumber greenness was measured nondestructively by video imaging, and shelf life was measured by visual observation of incipient yellowing. In the summer, filters were used to cover individual fruit to reduce light intensity reaching the fruit surface. The lower the light intensity incident on a cucumber, the shorter its shelf life. The average shelf life was 8, 5, or 1 days for cucumbers receiving 100%, 66%, or 31% of natural daylight, respectively. The fruit that were covered with a filter transmitting red (R) light were greener (low grey level via video imaging) than those with a far-red (FR) filter. In the fall, fruit receiving spectral R lighting from fluorescence tubes were greener and had a longer shelf life than those receiving FR lighting from incandescent bulbs. In the winter, high-pressure sodium (HPS) lighting was necessary to supplement natural daylight for crop growth and production. Under HPS, R and FR lighting produced the same fruit greenness and shelf life. In the spring, R-lighted fruit had longer shelf life than FR-lighted ones, although fruit color at harvest was similar. In these four experiments, postharvest shelf life of long English cucumber was generally related to fruit greenness upon harvest. The data suggest the importance of an open canopy in improving fruit greenness and shelf life of greenhouse-grown cucumbers.
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Claims 13
Claim · model-written summary
Lower incident light shortened cucumber shelf life.
- Taxon
- cucumber
Cucumis sativuse0 - Treatment
- light intensitye0
- Outcome
- shelf lifee0
- Direction
- shortere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lower the light intensity incident on a cucumber, the shorter its shelf life”
Claim · model-written summary
At 100% natural daylight, average cucumber shelf life was 8 days.
- Taxon
- cucumbersCucumis sativuse0
- Treatment
- 100%e0
- Outcome
- average shelf lifee0
- Value
- 8e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The average shelf life was 8, 5, or 1 days for cucumbers receiving 100%, 66%, or 31% of natural daylight, respectively”
Claim · model-written summary
At 66% natural daylight, average cucumber shelf life was 5 days.
- Taxon
- cucumbersCucumis sativuse0
- Treatment
- 66%e0
- Outcome
- average shelf lifee0
- Value
- 5e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The average shelf life was 8, 5, or 1 days for cucumbers receiving 100%, 66%, or 31% of natural daylight, respectively”
Claim · model-written summary
At 31% natural daylight, average cucumber shelf life was 1 day.
- Taxon
- cucumbersCucumis sativuse0
- Treatment
- 31%e0
- Outcome
- average shelf lifee0
- Value
- 1 dayse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The average shelf life was 8, 5, or 1 days for cucumbers receiving 100%, 66%, or 31% of natural daylight, respectively”
Claim · model-written summary
Fruit under a red-transmitting filter were greener than fruit under a far-red filter.
- Taxon
- CucumberCucumis sativust0
- Treatment
- filter transmitting red (R) lighte0
- Outcome
- greenere0
- Direction
- greenere0
- Comparator
- far-red (FR) filtere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The fruit that were covered with a filter transmitting red (R) light were greener (low grey level via video imaging) than those with a far-red (FR) filter”
t0“Cucumber”
Claim · model-written summary
In fall, red-lit fruit were greener than far-red-lit fruit.
- Taxon
- CucumberCucumis sativust0
- Treatment
- spectral R lighting from fluorescence tubese0
- Outcome
- greenere0
- Direction
- greenere0
- Comparator
- FR lighting from incandescent bulbse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the fall, fruit receiving spectral R lighting from fluorescence tubes were greener and had a longer shelf life than those receiving FR lighting from incandescent bulbs”
t0“Cucumber”
Claim · model-written summary
In fall, red-lit fruit had longer shelf life than far-red-lit fruit.
- Taxon
- CucumberCucumis sativust0
- Treatment
- spectral R lighting from fluorescence tubese0
- Outcome
- shelf lifee0
- Direction
- longere0
- Comparator
- FR lighting from incandescent bulbse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the fall, fruit receiving spectral R lighting from fluorescence tubes were greener and had a longer shelf life than those receiving FR lighting from incandescent bulbs”
t0“Cucumber”
Claim · model-written summary
High-pressure sodium lighting was needed for crop growth and production during winter.
- Taxon
- CucumberCucumis sativust0
- Treatment
- high-pressure sodium (HPS) lightinge0
- Outcome
- crop growth and productione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the winter, high-pressure sodium (HPS) lighting was necessary to supplement natural daylight for crop growth and production”
t0“Cucumber”
Claim · model-written summary
Under HPS, red and far-red light yielded the same fruit greenness and shelf life.
- Taxon
- CucumberCucumis sativust0
- Treatment
- Re0
- Outcome
- fruit greenness and shelf lifee0
- Direction
- the samee0
- Comparator
- FR lightinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under HPS, R and FR lighting produced the same fruit greenness and shelf life”
t0“Cucumber”
Claim · model-written summary
In spring, red-lit fruit had longer shelf life than far-red-lit fruit.
- Taxon
- CucumberCucumis sativust0
- Treatment
- R-lightede0
- Outcome
- shelf lifee0
- Direction
- longere0
- Comparator
- FR-lightede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the spring, R-lighted fruit had longer shelf life than FR-lighted ones”
t0“Cucumber”
Claim · model-written summary
In spring, fruit color at harvest was similar under red and far-red lighting.
- Taxon
- CucumberCucumis sativust0
- Treatment
- R-lightede0
- Outcome
- fruit color at harveste0
- Direction
- similare0
- Comparator
- FR-lightede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the spring, R-lighted fruit had longer shelf life than FR-lighted ones, although fruit color at harvest was similar”
t0“Cucumber”
Claim · model-written summary
Harvest greenness was generally associated with later shelf life.
- Taxon
- long English cucumbere0
- Organ / stage
- fruite0
- Outcome
- postharvest shelf lifee0
- Qualifier
- generally related to fruit greenness upon harveste0
Not reportedDirection
Verbatim
e0“postharvest shelf life of long English cucumber was generally related to fruit greenness upon harvest”
Claim · model-written summary
The authors suggested an open canopy to improve fruit greenness and shelf life.
- Taxon
- cucumbersCucumis sativuse0
- Outcome
- an open canopye0
- Qualifier
- improving fruit greenness and shelf lifee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The data suggest the importance of an open canopy in improving fruit greenness and shelf life of greenhouse-grown cucumbers”
The same questions in other papers
light · quality: postharvest · Cucumis sativus (cucumber)Positive and negative results
6 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
4 papers more in this group
See all 8 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.