Abstract
The effect of light sources having different photon flux and spectral distribution on photosynthetic efficiency was studied in chrysanthemum (Dendranthema grandiflorum). To compare photosynthetic efficiency under each light source, yield photon flux between 300 and 800 ㎚ was determined as the product of the spectral photon flux and the relative quantum efficiency, which was varied considerably depending on the light sources. The yield photon flux of sunlight increased from 330 ㎚ and the highest peak was recorded in red light region and then decreased rapidly at longer than 674 ㎚. When comparing the values of yield photon flux among artificial lamps, high-pressure sodium lamp gave the highest followed by metal halide, fluorescent tube, and incandescent lamps. When chrysanthemum cv. Puma was grown under different artificial light sources, photosynthetic rate and leaf chlorophyll contents were in the same order where high-pressure sodium lamp were highest and incandescent lamp least. These results were consistent with that of photosynthetically active radiation in the 400-800 ㎚ region. Spectral distribution also affected photosynthetic efficiency, but less significant than the irradiance level.
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Claims 7
Claim · model-written summary
Sunlight yield photon flux increased from 330 ㎚.
- Taxon
- chrysanthemum
.jpeg?width=60)
Chrysanthemumt0 - Outcome
- yield photon fluxe0
- Direction
- increasede0
- Value
- 330 ㎚e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpeg?width=500)
Verbatim
e0“The yield photon flux of sunlight increased from 330 ㎚ and the highest peak was recorded in red light region and then decreased rapidly at longer than 674 ㎚.”
t0“Chrysanthemum”
Claim · model-written summary
Sunlight yield photon flux peaked in the red region.
- Taxon
- chrysanthemumChrysanthemumt0
- Outcome
- highest peake0
- Direction
- higheste0
- Qualifier
- red light regione0
Not reportedOrgan / stage
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield photon flux of sunlight increased from 330 ㎚ and the highest peak was recorded in red light region and then decreased rapidly at longer than 674 ㎚.”
t0“Chrysanthemum”
Claim · model-written summary
Sunlight yield photon flux decreased beyond 674 ㎚.
- Taxon
- chrysanthemumChrysanthemumt0
- Outcome
- yield photon fluxe0
- Direction
- decreasede0
- Value
- 674 ㎚e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield photon flux of sunlight increased from 330 ㎚ and the highest peak was recorded in red light region and then decreased rapidly at longer than 674 ㎚.”
t0“Chrysanthemum”
Claim · model-written summary
High-pressure sodium had the highest yield photon flux among lamps.
- Taxon
- chrysanthemumChrysanthemumt0
- Treatment
- high-pressure sodium lampe0
- Outcome
- yield photon fluxe0
- Direction
- higheste0
- Comparator
- metal halide, fluorescent tube, and incandescent lampse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When comparing the values of yield photon flux among artificial lamps, high-pressure sodium lamp gave the highest followed by metal halide, fluorescent tube, and incandescent lamps.”
t0“Chrysanthemum”
Claim · model-written summary
High-pressure sodium gave the highest photosynthetic rate and incandescent lamp the least.
- Taxon
- chrysanthemumChrysanthemume0
- Material
- cv. Pumae0
- Treatment
- high-pressure sodium lampe0
- Outcome
- photosynthetic ratee0
- Direction
- higheste0
- Comparator
- incandescent lampe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When chrysanthemum cv. Puma was grown under different artificial light sources, photosynthetic rate and leaf chlorophyll contents were in the same order where high-pressure sodium lamp were highest and incandescent lamp least.”
Claim · model-written summary
High-pressure sodium gave the highest leaf chlorophyll contents and incandescent lamp the least.
- Taxon
- chrysanthemumChrysanthemume0
- Material
- cv. Pumae0
- Treatment
- high-pressure sodium lampe0
- Outcome
- leaf chlorophyll contentse0
- Direction
- higheste0
- Comparator
- incandescent lampe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When chrysanthemum cv. Puma was grown under different artificial light sources, photosynthetic rate and leaf chlorophyll contents were in the same order where high-pressure sodium lamp were highest and incandescent lamp least.”
Claim · model-written summary
Spectral distribution affected photosynthetic efficiency less than irradiance level.
- Taxon
- chrysanthemumChrysanthemumt0
- Treatment
- Spectral distributione0
- Outcome
- photosynthetic efficiencye0
- Direction
- less significante0
- Comparator
- irradiance levele0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spectral distribution also affected photosynthetic efficiency, but less significant than the irradiance level.”
t0“Chrysanthemum”
The same questions in other papers
sodium atom · physiology: photosynthesis · ChrysanthemumResults agree
1 paper in the same direction as this paper
- positive
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.