Abstract
The effects of light quality on photosynthesis and transpiration of chrysanthemums during the vegetative and flowering stages are not known. Leaf and whole-plant CO 2 and H 2 O exchanges of chrysanthemums during long-day (LD) and short-day (SD) photoperiods were measured under varying intensity levels of high-pressure sodium (HPS) and different monochromatic and multicolour light-emitting diode (LED) lights. All light sources induced leaf photosynthesis effectively, including green and orange LEDs. During both LD and SD, HPS, white, and notably orange light produced high rates of photosynthesis, whereas blue light had the lowest rates. In addition, there were only subtle changes in the response of leaf functions to light quality during flowering induction. Diurnal patterns of whole-plant net C exchange rate were similar under HPS and two commercial LED lights, one red–blue (RB) and one red–white (RW), during both LD and SD. The RB and RW LED lights were as effective at maintaining whole-plant C gain during the day as traditional HPS lights. However, in comparison to HPS, the RB and RW LEDs increased whole-plant transpiration and decreased water-use efficiency (WUE). A decrease in WUE under these LEDs was not evident from the leaf measurements, which emphasizes the importance of examining responses to light quality at the whole-plant level as well and not at the leaf level alone. In commercial production, the wavelength of supplementary lighting may heavily influence WUE and subsequent nutrient uptake, and ultimately growth and quality of cut flower crops.
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Claims 10
Claim · model-written summary
All tested light sources, including green and orange LEDs, induced chrysanthemum leaf photosynthesis.
- Taxon
- chrysanthemums
.jpeg?width=60)
Chrysanthemumt0 - Treatment
- All light sourcese0
- Outcome
- leaf photosynthesise0
- Direction
- effectivelye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpeg?width=500)
Verbatim
e0“All light sources induced leaf photosynthesis effectively, including green and orange LEDs.”
t0“chrysanthemums”
Claim · model-written summary
HPS, white and orange light produced high photosynthesis rates during long and short days.
- Taxon
- chrysanthemumsChrysanthemumt0
- Treatment
- HPS, white, and notably orange lighte0
- Outcome
- rates of photosynthesise0
- Direction
- highe0
- Qualifier
- both LD and SDe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During both LD and SD, HPS, white, and notably orange light produced high rates of photosynthesis”
t0“chrysanthemums”
Claim · model-written summary
Blue light produced the lowest photosynthesis rates during long and short days.
- Taxon
- chrysanthemumsChrysanthemumt0
- Treatment
- blue lighte0
- Outcome
- rates of photosynthesise1
- Direction
- loweste0
- Comparator
- HPS, white, and notably orange lighte1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whereas blue light had the lowest rates.”
e1“During both LD and SD, HPS, white, and notably orange light produced high rates of photosynthesis”
t0“chrysanthemums”
Claim · model-written summary
Flower induction brought only subtle changes in leaf responses to light quality.
- Taxon
- chrysanthemumsChrysanthemumt0
- Organ / stage
- flowering inductione0
- Outcome
- response of leaf functions to light qualitye0
- Direction
- only subtle changese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there were only subtle changes in the response of leaf functions to light quality during flowering induction”
t0“chrysanthemums”
Claim · model-written summary
Whole-plant diurnal net carbon exchange patterns were similar under HPS, RB and RW lighting during long and short days.
- Taxon
- chrysanthemumsChrysanthemumt0
- Treatment
- two commercial LED lightse0
- Outcome
- Diurnal patterns of whole-plant net C exchange ratee0
- Direction
- similare0
- Qualifier
- both LD and SDe0
- Comparator
- HPSe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Diurnal patterns of whole-plant net C exchange rate were similar under HPS and two commercial LED lights, one red–blue (RB) and one red–white (RW), during both LD and SD.”
t0“chrysanthemums”
Claim · model-written summary
RB and RW LEDs maintained daytime whole-plant carbon gain as effectively as HPS.
- Taxon
- chrysanthemumsChrysanthemumt0
- Treatment
- RB and RW LED lightse0
- Outcome
- whole-plant C gaine0
- Direction
- as effectivee0
- Comparator
- traditional HPS lightse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The RB and RW LED lights were as effective at maintaining whole-plant C gain during the day as traditional HPS lights.”
t0“chrysanthemums”
Claim · model-written summary
RB and RW LEDs increased whole-plant transpiration relative to HPS.
- Taxon
- chrysanthemumsChrysanthemumt0
- Treatment
- RB and RW LEDse0
- Outcome
- whole-plant transpiratione0
- Direction
- increasede0
- Comparator
- HPSe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in comparison to HPS, the RB and RW LEDs increased whole-plant transpiration and decreased water-use efficiency (WUE).”
t0“chrysanthemums”
Claim · model-written summary
RB and RW LEDs decreased whole-plant water-use efficiency relative to HPS.
- Taxon
- chrysanthemumsChrysanthemumt0
- Treatment
- RB and RW LEDse0
- Outcome
- water-use efficiency (WUE)e0
- Direction
- decreasede0
- Comparator
- HPSe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in comparison to HPS, the RB and RW LEDs increased whole-plant transpiration and decreased water-use efficiency (WUE).”
t0“chrysanthemums”
Claim · model-written summary
Leaf measurements did not reveal the LED-associated decrease in water-use efficiency.
- Taxon
- chrysanthemumsChrysanthemumt0
- Organ / stage
- leafe0
- Outcome
- decrease in WUEe0
- Direction
- not evidente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A decrease in WUE under these LEDs was not evident from the leaf measurements”
t0“chrysanthemums”
Claim · model-written summary
The authors conclude that supplementary light wavelength may strongly influence WUE, nutrient uptake, growth and cut-flower quality in production.
- Taxon
- chrysanthemumsChrysanthemumt0
- Outcome
- wavelength of supplementary lighting may heavily influence WUE and subsequent nutrient uptake, and ultimately growth and quality of cut flower cropse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In commercial production, the wavelength of supplementary lighting may heavily influence WUE and subsequent nutrient uptake, and ultimately growth and quality of cut flower crops.”
t0“chrysanthemums”
The same questions in other papers
sodium atom · physiology: photosynthesis · ChrysanthemumResults agree
1 paper in the same direction as this paper
- positive
light · physiology: water · ChrysanthemumPositive and negative results
2 in the opposite direction
- positive
- positive
light · physiology: photosynthesis · ChrysanthemumPositive and negative results
5 papers in the same direction as this paper · 5 in the opposite direction
- negative
- negative
- negative
7 papers more in this group
See all 11 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.