Abstract
In 5-d-old etiolated seedlings of Sorghum bicolor, 12 h of darkness after 5 min in red light eliminated a lag before the accumulation of chlorophylls in subsequent continuous white light. Increasing the dark period to 24 h and 36 h, increased the rate of chlorophyll accumulation in the later stages of greening. Exogenous δ-aminolevulinic acid neither completely removed the lag, nor increased the rate of chlorophyll accumulation. Cycloheximide (25 μg ml−1) and 6-methyl purine (5.0 μg ml−1), given continuously or only until the 12 h dark period following the red light irradiation, restored the lag and decreased the rate of chlorophyll accumulation. D-threo-chloramphenicol (400μg ml−1) also decreased the rate of chlorophyll accumulation but did not restore the lag. Addition of these inhibitors even 12 h after red light irradiation decreased the rate of chlorophyll accumulation. Rifampicin (Rifamycin SV, 400 μg ml−1) did not have such effects.
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Claims 8
Claim · model-written summary
Twelve hours of darkness after red light eliminated the lag in later chlorophyll accumulation.
- Taxon
- Sorghum bicolor
Sorghum bicolore0 - Organ / stage
- 5-d-old etiolated seedlingse0
- Treatment
- 12 h of darkness after 5 min in red lighte0
- Outcome
- a lag before the accumulation of chlorophyllse0
- Direction
- eliminatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 5-d-old etiolated seedlings of Sorghum bicolor, 12 h of darkness after 5 min in red light eliminated a lag before the accumulation of chlorophylls in subsequent continuous white light”
Claim · model-written summary
Extending darkness to 24 and 36 hours increased later chlorophyll accumulation rates.
- Taxon
- Sorghum bicolorSorghum bicolort0
- Treatment
- 24 h and 36 he0
- Outcome
- rate of chlorophyll accumulatione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing the dark period to 24 h and 36 h, increased the rate of chlorophyll accumulation in the later stages of greening”
t0“Sorghum bicolor”
Claim · model-written summary
Exogenous δ-aminolevulinic acid did not completely remove the lag or increase chlorophyll accumulation rate.
- Taxon
- Sorghum bicolorSorghum bicolort0
- Treatment
- Exogenous δ-aminolevulinic acide0
- Outcome
- lage0
- Direction
- neither completely removede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous δ-aminolevulinic acid neither completely removed the lag, nor increased the rate of chlorophyll accumulation”
t0“Sorghum bicolor”
Claim · model-written summary
Cycloheximide restored the lag and decreased chlorophyll accumulation rate.
- Taxon
- Sorghum bicolorSorghum bicolort0
- Treatment
- Cycloheximide (25 μg ml−1)e0
- Outcome
- lag and decreased the rate of chlorophyll accumulatione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cycloheximide (25 μg ml−1) and 6-methyl purine (5.0 μg ml−1), given continuously or only until the 12 h dark period following the red light irradiation, restored the lag and decreased the rate of chlorophyll accumulation”
t0“Sorghum bicolor”
Claim · model-written summary
6-methyl purine restored the lag and decreased chlorophyll accumulation rate.
- Taxon
- Sorghum bicolorSorghum bicolort0
- Treatment
- 6-methyl purine (5.0 μg ml−1)e0
- Outcome
- rate of chlorophyll accumulatione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cycloheximide (25 μg ml−1) and 6-methyl purine (5.0 μg ml−1), given continuously or only until the 12 h dark period following the red light irradiation, restored the lag and decreased the rate of chlorophyll accumulation”
t0“Sorghum bicolor”
Claim · model-written summary
D-threo-chloramphenicol decreased chlorophyll accumulation rate without restoring the lag.
- Taxon
- Sorghum bicolorSorghum bicolort0
- Treatment
- D-threo-chloramphenicol (400μg ml−1)e0
- Outcome
- rate of chlorophyll accumulatione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“D-threo-chloramphenicol (400μg ml−1) also decreased the rate of chlorophyll accumulation but did not restore the lag”
t0“Sorghum bicolor”
Claim · model-written summary
Inhibitors added 12 hours after red irradiation decreased chlorophyll accumulation rate.
- Taxon
- Sorghum bicolorSorghum bicolort0
- Treatment
- these inhibitorse0
- Outcome
- rate of chlorophyll accumulatione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Addition of these inhibitors even 12 h after red light irradiation decreased the rate of chlorophyll accumulation”
t0“Sorghum bicolor”
Claim · model-written summary
Rifampicin did not have the reported lag and chlorophyll accumulation effects.
- Taxon
- Sorghum bicolorSorghum bicolort0
- Treatment
- Rifampicin (Rifamycin SV, 400 μg ml−1)e0
- Outcome
- such effectse0
- Direction
- did not havee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rifampicin (Rifamycin SV, 400 μg ml−1) did not have such effects”
t0“Sorghum bicolor”
The same questions in other papers
light · molecular: metabolites · Sorghum bicolor (sorghum)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- 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.