Abstract
Photosynthesis was reduced by 85% to 90% in perennial ryegrass (Lolium perenne L. cv. Derby) following a one-day chilling exposure at 8C day (450 μmol·s -1 ·m -2 PPF) and 5C night. Seven days of recovery at 22/17C day/night were required for full recovery of photosynthesis. More than 75% of the limitation in photosynthesis following chilling was due to non-stomatal factors, and reduced initial slopes of CO 2 assimilation vs. intercellular CO, indicate that photosynthetic capacity was reduced for 5 days following chilling. Carbon dioxide assimilation at saturating intercellular CO 2 (>500 μmol·mol -l ) was also reduced by chilling, indicating again that stomatal limitations were a minor contributor to the photosynthetic reduction observed under ambient CO 2 .
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Claims 5
Claim · model-written summary
One day of chilling reduced perennial ryegrass photosynthesis by 85% to 90%.
- Taxon
- perennial ryegrass
Lolium perennee0 - Material
- Lolium perenne L. cv. Derbye0
- Treatment
- one-day chilling exposure at 8C day (450 μmol·s -1 ·m -2 PPF) and 5C nighte0
- Outcome
- Photosynthesise0
- Direction
- reducede0
- Value
- 85% to 90%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Photosynthesis was reduced by 85% to 90% in perennial ryegrass (Lolium perenne L. cv. Derby) following a one-day chilling exposure at 8C day (450 μmol·s -1 ·m -2 PPF) and 5C night”
Claim · model-written summary
Full photosynthetic recovery required seven days at 22/17C.
Not reportedTaxon
Verbatim
e0“Seven days of recovery at 22/17C day/night were required for full recovery of photosynthesis”
Claim · model-written summary
Non-stomatal factors accounted for more than 75% of photosynthetic limitation after chilling.
- Taxon
- Lolium perenneLolium perennet0
- Outcome
- limitation in photosynthesise0
- Value
- More than 75%e0
- Qualifier
- non-stomatal factorse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“More than 75% of the limitation in photosynthesis following chilling was due to non-stomatal factors”
t0“Lolium perenne”
Claim · model-written summary
Reduced initial CO2 response slopes indicated that photosynthetic capacity remained reduced for five days after chilling.
- Taxon
- Lolium perenneLolium perennet0
- Outcome
- photosynthetic capacitye0
- Direction
- reducede0
- Value
- 5 dayse0
- Qualifier
- reduced initial slopes of CO 2 assimilation vs. intercellular COe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reduced initial slopes of CO 2 assimilation vs. intercellular CO, indicate that photosynthetic capacity was reduced for 5 days following chilling”
t0“Lolium perenne”
Claim · model-written summary
Chilling reduced carbon dioxide assimilation at saturating intercellular CO2.
- Taxon
- Lolium perenneLolium perennet0
- Treatment
- chillinge0
- Outcome
- Carbon dioxide assimilatione0
- Direction
- reducede0
- Qualifier
- saturating intercellular CO 2 (>500 μmol·mol -l )e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Carbon dioxide assimilation at saturating intercellular CO 2 (>500 μmol·mol -l ) was also reduced by chilling”
t0“Lolium perenne”
The same questions in other papers
cold · physiology: photosynthesis · Lolium perenne (perennial ryegrass)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- negative
cold · molecular: metabolites · Lolium perenne (perennial ryegrass)Positive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
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.