Abstract
The objective of this study was to investigate the effect of different supplemental intensity of green light in mixed light-emitting diodes (LEDs) on rice (Oryza sativa L.) seedling growth, and their after-effect on grain yield. The rice seedlings were nursed in greenhouse with 30-days continuous supplemental lighting (6 h/day) from three light sources: 75% red + 25% blue (photon flux density) LED (RB), 62.5% red + 25% blue + 12.5% green LED (RBG12.5) and 50% red + 25% blue + 25% green LED (RBG25), and then transplanted into paddy field in two consecutive years (2014 and 2015). The results showed that both shoot and root growth of rice seedlings were enhanced by the addition of green light into red and blue LEDs, but the response of different organ systems depended on the intensity of green light. The low percentage of green light in the light source (RBG12.5) could not only promote the stem elongation, the shoot dry weight accumulation and the root respiration activity but also could change the root morphology (indicated by the total surface area and the average diameter of root), while the high percentage of green light (RBG25) only changed the root morphology and increased the root respiration activity. The influence of light on rice during the seedling stage extends to the end of the maturity stage, with the highest rice grain yield, spikelets per panicle and the grain filling percentage in RBG25.
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Claims 10
Claim · model-written summary
Adding green light enhanced rice seedling shoot and root growth.
- Taxon
- rice
Oryza sativae0 - Treatment
- addition of green light into red and blue LEDse0
- Outcome
- shoot and root growthe0
- Direction
- enhancede0
- Comparator
- red and blue LEDse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both shoot and root growth of rice seedlings were enhanced by the addition of green light into red and blue LEDs”
Claim · model-written summary
RBG12.5 promoted stem elongation.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The low percentage of green light in the light source (RBG12.5) could not only promote the stem elongation”
t0“rice”
e1“LED (RB)”
Claim · model-written summary
RBG12.5 promoted shoot dry weight accumulation.
- Taxon
- riceOryza sativat0
- Treatment
- RBG12.5e0
- Outcome
- shoot dry weight accumulatione0
- Direction
- promotee0
- Comparator
- RBe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“(RBG12.5) could not only promote the stem elongation, the shoot dry weight accumulation”
t0“rice”
e1“LED (RB)”
Claim · model-written summary
RBG12.5 promoted root respiration activity.
- Taxon
- riceOryza sativat0
- Treatment
- RBG12.5e0
- Outcome
- root respiration activitye0
- Direction
- promotee0
- Comparator
- RBe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“(RBG12.5) could not only promote the stem elongation, the shoot dry weight accumulation and the root respiration activity”
t0“rice”
e1“LED (RB)”
Claim · model-written summary
RBG12.5 changed root surface area and average diameter.
- Taxon
- riceOryza sativat0
- Treatment
- RBG12.5e0
- Outcome
- root morphologye0
- Qualifier
- total surface area and the average diameter of roote0
- Comparator
- RBe1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“(RBG12.5) could not only promote the stem elongation, the shoot dry weight accumulation and the root respiration activity but also could change the root morphology (indicated by the total surface area and the average diameter of root)”
t0“rice”
e1“LED (RB)”
Claim · model-written summary
RBG25 changed root morphology.
- Taxon
- riceOryza sativat0
- Treatment
- RBG25e0
- Outcome
- root morphologye0
- Comparator
- RBe1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the high percentage of green light (RBG25) only changed the root morphology”
t0“rice”
e1“LED (RB)”
Claim · model-written summary
RBG25 increased root respiration activity.
- Taxon
- riceOryza sativat0
- Treatment
- RBG25e0
- Outcome
- root respiration activitye0
- Direction
- increasede0
- Comparator
- RBe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the high percentage of green light (RBG25) only changed the root morphology and increased the root respiration activity.”
t0“rice”
e1“LED (RB)”
Claim · model-written summary
RBG25 produced the highest grain yield.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with the highest rice grain yield, spikelets per panicle and the grain filling percentage in RBG25.”
e1“LED (RB)”
Claim · model-written summary
RBG25 produced the highest spikelets per panicle.
- Taxon
- riceOryza sativae0
- Treatment
- RBG25e0
- Outcome
- spikelets per paniclee0
- Direction
- higheste0
- Comparator
- RBe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with the highest rice grain yield, spikelets per panicle and the grain filling percentage in RBG25.”
e1“LED (RB)”
Claim · model-written summary
RBG25 produced the highest grain filling percentage.
- Taxon
- riceOryza sativae0
- Treatment
- RBG25e0
- Outcome
- grain filling percentagee0
- Direction
- higheste0
- Comparator
- RBe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with the highest rice grain yield, spikelets per panicle and the grain filling percentage in RBG25.”
e1“LED (RB)”
The same questions in other papers
light · growth · Oryza sativa (rice)Positive and negative results
54 papers in the same direction as this paper · 38 in the opposite direction · 2 reporting no difference from an alternative
- no effect
- positive
- positive
91 papers more in this group
See all 95 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.