Abstract
Insufficient light in autumn–winter may prolong the production periods and reduce the quality of plug seedlings grown in greenhouses. Additionally, there is no optimal protocol for supplementary light strategies when providing the same amount of light for plug seedling production. This study was conducted to determine the influences of combinations of supplementary light intensity and light duration with the same daily light integral (DLI) on the morphological and physiological properties of cucumber seedlings (Cucumis sativus L. cv. Tianjiao No. 5) grown in a greenhouse. A supplementary light with the same DLI of 6.0 mol m−2 d−1 was applied with the light duration set to 6, 8, 10, or 12 h d−1 provided by light-emitting diodes (LEDs), and cucumber seedlings grown with sunlight only were set as the control. The results indicated that increasing DLI using supplementary light promoted the growth and development of cucumber seedlings over those grown without supplementary light; however, opposite trends were observed in the superoxide dismutase (SOD) and catalase (CAT) activities. Under equal DLI, increasing the supplementary light duration from 6 to 10 h d−1 increased the root surface area (66.8%), shoot dry weight (24.0%), seedling quality index (237.0%), root activity (60.0%), and stem firmness (27.2%) of the cucumber seedlings. The specific leaf area of the cucumber seedlings decreased quadratically with an increase in supplementary light duration, and an opposite trend was exhibited for the stem diameter of the cucumber seedlings. In summary, increased DLI or longer light duration combined with lower light intensity with equal DLI provided by supplementary light in insufficient sunlight seasons improved the quality of the cucumber seedlings through the modification of the root architecture and stem firmness, increasing the mechanical strength of the cucumber seedlings for transplanting.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 10
Claim · model-written summary
Increasing DLI with supplementary light promoted growth and development of cucumber seedlings compared with seedlings grown without supplementary light.
- Taxon
- cucumber
Cucumis sativuse0 - Treatment
- increasing DLI using supplementary lighte0
- Outcome
- growth and developmente0
- Direction
- promotede0
- Comparator
- those grown without supplementary lighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing DLI using supplementary light promoted the growth and development of cucumber seedlings over those grown without supplementary light”
t0“Cucumber”
Claim · model-written summary
Superoxide dismutase and catalase activities showed opposite trends to growth and development when DLI was increased with supplementary light.
- Taxon
- cucumberCucumis sativuse0
- Treatment
- increasing DLI using supplementary lighte0
- Outcome
- superoxide dismutase (SOD) and catalase (CAT) activitiese0
- Direction
- opposite trendse0
- Comparator
- those grown without supplementary lighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing DLI using supplementary light promoted the growth and development of cucumber seedlings over those grown without supplementary light; however, opposite trends were observed in the superoxide dismutase (SOD) and catalase (CAT) activities”
Claim · model-written summary
Increasing supplementary light duration from 6 to 10 h per day under equal DLI increased root surface area by 66.8%.
- Taxon
- CucumberCucumis sativust0
- Treatment
- increasing the supplementary light duration from 6 to 10 h d−1e0
- Outcome
- root surface areae0
- Direction
- increasede0
- Value
- 66.8%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing the supplementary light duration from 6 to 10 h d−1 increased the root surface area (66.8%)”
t0“Cucumber”
Claim · model-written summary
Increasing supplementary light duration from 6 to 10 h per day under equal DLI increased shoot dry weight by 24.0%.
- Taxon
- CucumberCucumis sativust0
- Treatment
- increasing the supplementary light duration from 6 to 10 h d−1e0
- Outcome
- shoot dry weighte0
- Direction
- increasede0
- Value
- 24.0%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing the supplementary light duration from 6 to 10 h d−1 increased the root surface area (66.8%), shoot dry weight (24.0%)”
t0“Cucumber”
Claim · model-written summary
Increasing supplementary light duration from 6 to 10 h per day under equal DLI increased seedling quality index by 237.0%.
- Taxon
- CucumberCucumis sativust0
- Treatment
- increasing the supplementary light duration from 6 to 10 h d−1e0
- Outcome
- seedling quality indexe0
- Direction
- increasede0
- Value
- 237.0%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing the supplementary light duration from 6 to 10 h d−1 increased the root surface area (66.8%), shoot dry weight (24.0%), seedling quality index (237.0%)”
t0“Cucumber”
Claim · model-written summary
Increasing supplementary light duration from 6 to 10 h per day under equal DLI increased root activity by 60.0%.
- Taxon
- CucumberCucumis sativust0
- Treatment
- increasing the supplementary light duration from 6 to 10 h d−1e0
- Outcome
- root activitye0
- Direction
- increasede0
- Value
- 60.0%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing the supplementary light duration from 6 to 10 h d−1 increased the root surface area (66.8%), shoot dry weight (24.0%), seedling quality index (237.0%), root activity (60.0%)”
t0“Cucumber”
Claim · model-written summary
Increasing supplementary light duration from 6 to 10 h per day under equal DLI increased stem firmness by 27.2%.
- Taxon
- CucumberCucumis sativust0
- Treatment
- increasing the supplementary light duration from 6 to 10 h d−1e0
- Outcome
- stem firmnesse0
- Direction
- increasede0
- Value
- 27.2%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing the supplementary light duration from 6 to 10 h d−1 increased the root surface area (66.8%), shoot dry weight (24.0%), seedling quality index (237.0%), root activity (60.0%), and stem firmness (27.2%)”
t0“Cucumber”
Claim · model-written summary
Specific leaf area of cucumber seedlings decreased quadratically with increasing supplementary light duration.
- Taxon
- cucumberCucumis sativuse0
- Treatment
- supplementary light duratione0
- Outcome
- specific leaf areae0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The specific leaf area of the cucumber seedlings decreased quadratically with an increase in supplementary light duration, and an opposite trend was exhibited for the stem diameter of the cucumber seedlings”
Claim · model-written summary
Stem diameter of cucumber seedlings showed the opposite trend to specific leaf area with increasing supplementary light duration.
- Taxon
- cucumberCucumis sativuse0
- Treatment
- supplementary light duratione0
- Outcome
- stem diametere0
- Direction
- opposite trende0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The specific leaf area of the cucumber seedlings decreased quadratically with an increase in supplementary light duration, and an opposite trend was exhibited for the stem diameter of the cucumber seedlings”
Claim · model-written summary
The authors conclude that increased DLI, or longer light duration with lower intensity at equal DLI, improved seedling quality through changes in root architecture and stem firmness.
- Taxon
- cucumberCucumis sativuse0
- Treatment
- longer light duration combined with lower light intensitye0
- Outcome
- quality of the cucumber seedlingse0
- Qualifier
- modification of the root architecture and stem firmnesse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased DLI or longer light duration combined with lower light intensity with equal DLI provided by supplementary light in insufficient sunlight seasons improved the quality of the cucumber seedlings through the modification of the root architecture and stem firmness”
The same questions in other papers
light · growth · Cucumis sativus (cucumber)Results differ
52 papers in the same direction as this paper · 29 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- negative
- positive
79 papers more in this group
See all 83 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
- positive
- positive
- negative
4 papers more in this group
See all 8 papers →light · quality: general · Cucumis sativus (cucumber)Results agree
4 papers in the same direction as this paper
- positive
- positive
- positive
1 paper more in this group
See all 5 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.