Abstract
Specific aspects of plant cultivation require tests under fully controlled environmental conditions with restricted energy supply, such as orbit-based space laboratories and low-light conditions. For these growing conditions, super dwarf plants have been developed as model crops, and a gibberellin- deficient Super Dwarf Rice genotype was proposed as a model crop for space flight plant experiments. We tested this genotype in a climate chamber experiment under different illumination and nitrogen supply levels to assess its suitability under scenarios with limited resource availability. A 25% reduction in illumination led to a 75% reduction in yield, mainly due to a 60% reduction in formed tillers and 20% reduction in grain weight, and a 80% reduction in illumination caused total yield loss. Leaf area under reduced illumination was significantly lower, and only marginal changes in the dimensions of leaves were observed. Plant photosynthesis was not significantly different between control and 75% illumination. This was explained by a higher photochemical efficiency under lower light conditions and a reduced mesophyll resistance. Therefore, we concluded that this genotype is well-suited for plant experiments under space and light-limited conditions since it kept its small stature and showed no shade avoidance mechanisms, such as leaf elongation, which would complicate experiments under low-light conditions. Nitrogen concentrations of 2.8 and 1.4 mmol/L led to no differences in plant growth. We concluded that a nitrogen concentration of 1.4 mmol/L is sufficient for this genotype under the light intensities.
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Claims 12
Claim · model-written summary
A 25% illumination reduction reduced yield by 75%.
- Taxon
- Rice
Oryza sativat0 - Material
- Super Dwarf Ricet0
- Treatment
- 25% reduction in illuminatione0
- Outcome
- yielde0
- Direction
- reductione0
- Value
- 75%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A 25% reduction in illumination led to a 75% reduction in yield”
t0“Super Dwarf Rice”
Claim · model-written summary
A 25% illumination reduction reduced formed tillers by 60%.
- Taxon
- RiceOryza sativat0
- Material
- Super Dwarf Ricet0
- Treatment
- 25% reduction in illuminatione1
- Outcome
- formed tillerse0
- Direction
- reductione0
- Value
- 60%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a 60% reduction in formed tillers”
t0“Super Dwarf Rice”
e1“A 25% reduction in illumination led to a 75% reduction in yield”
Claim · model-written summary
A 25% illumination reduction reduced grain weight by 20%.
- Taxon
- RiceOryza sativat0
- Material
- Super Dwarf Ricet0
- Treatment
- 25% reduction in illuminatione1
- Outcome
- grain weighte0
- Direction
- reductione0
- Value
- 20%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“20% reduction in grain weight”
t0“Super Dwarf Rice”
e1“A 25% reduction in illumination led to a 75% reduction in yield”
Claim · model-written summary
An 80% illumination reduction caused total yield loss.
- Taxon
- RiceOryza sativat0
- Material
- Super Dwarf Ricet0
- Treatment
- 80% reduction in illuminatione0
- Outcome
- yielde0
- Direction
- losse0
- Value
- total yield losse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a 80% reduction in illumination caused total yield loss”
t0“Super Dwarf Rice”
Claim · model-written summary
Leaf area under reduced illumination was significantly lower.
- Taxon
- RiceOryza sativat0
- Material
- Super Dwarf Ricet0
- Treatment
- reduced illuminatione0
- Outcome
- Leaf areae0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf area under reduced illumination was significantly lower”
t0“Super Dwarf Rice”
Claim · model-written summary
Reduced illumination produced only marginal changes in leaf dimensions.
- Taxon
- RiceOryza sativat0
- Material
- Super Dwarf Ricet0
- Treatment
- reduced illuminatione1
- Outcome
- dimensions of leavese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“only marginal changes in the dimensions of leaves were observed”
t0“Super Dwarf Rice”
e1“Leaf area under reduced illumination was significantly lower”
Claim · model-written summary
Photosynthesis did not differ significantly between control and 75% illumination.
- Taxon
- RiceOryza sativat0
- Material
- Super Dwarf Ricet0
- Treatment
- 75% illuminatione0
- Outcome
- Plant photosynthesise0
- Direction
- not significantly differente0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant photosynthesis was not significantly different between control and 75% illumination.”
t0“Super Dwarf Rice”
Claim · model-written summary
Lower light was associated with higher photochemical efficiency.
- Taxon
- RiceOryza sativat0
- Material
- Super Dwarf Ricet0
- Treatment
- lower light conditionse0
- Outcome
- photochemical efficiencye0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a higher photochemical efficiency under lower light conditions”
t0“Super Dwarf Rice”
Claim · model-written summary
Lower light was associated with reduced mesophyll resistance.
- Taxon
- RiceOryza sativat0
- Material
- Super Dwarf Ricet0
- Treatment
- lower light conditionse1
- Outcome
- mesophyll resistancee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a reduced mesophyll resistance”
t0“Super Dwarf Rice”
e1“under lower light conditions”
Claim · model-written summary
The genotype maintained small stature and showed no shade avoidance such as leaf elongation under low light.
- Taxon
- RiceOryza sativat0
- Material
- Super Dwarf Ricet0
- Outcome
- small stature and showed no shade avoidance mechanisms, such as leaf elongatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it kept its small stature and showed no shade avoidance mechanisms, such as leaf elongation”
t0“Super Dwarf Rice”
Claim · model-written summary
Nitrogen concentrations of 2.8 and 1.4 mmol/L led to no differences in plant growth.
- Taxon
- RiceOryza sativat0
- Material
- Super Dwarf Ricet0
- Treatment
- Nitrogen concentrations of 2.8 and 1.4 mmol/Le0
- Outcome
- plant growthe0
- Direction
- no differencese0
- Comparator
- 2.8 and 1.4 mmol/Le0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen concentrations of 2.8 and 1.4 mmol/L led to no differences in plant growth.”
t0“Super Dwarf Rice”
Claim · model-written summary
The authors conclude that 1.4 mmol/L nitrogen is sufficient under the tested light intensities.
- Taxon
- RiceOryza sativat0
- Material
- Super Dwarf Ricet0
- Outcome
- a nitrogen concentration of 1.4 mmol/L is sufficiente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a nitrogen concentration of 1.4 mmol/L is sufficient for this genotype under the light intensities.”
t0“Super Dwarf Rice”
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