Abstract
Data from 3 lines of investigation were presented indicating that chlorophyll is not necessary for the increase in the triphosphopyridine nucleotide-requiring triosephosphate dehydrogenase accompanying the illumination of etiolated pea plants. These include A) the kinetics of the development of chlorophyll and enzyme activity, B) the presence of enzyme activity in leaves grown in the dark on normal plants and C) the high specific enzyme activity in leaves of a chlorophyll-less mutant. It was also shown that the light-initiated increase of enzyme activity continues for several days after removal from the light and that illumination with far-red light before the dark period inhibited, but did not abolish, this increase. The ability of green plants to continue to produce the enzyme in the dark was eventually lost with time, for after 7 days in the dark a stimulation in leaf protein formation was not accompanied by an increase in enzyme activity.
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Claims 6
Claim · model-written summary
Chlorophyll was unnecessary for the illumination-linked enzyme increase.
- Taxon
- pea plants
Lathyrus oleraceuse0 - Gene
- triphosphopyridine nucleotide-requiring triosephosphate dehydrogenasee0
- Outcome
- increase in the triphosphopyridine nucleotide-requiring triosephosphate dehydrogenasee0
- Qualifier
- chlorophyll is not necessarye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chlorophyll is not necessary for the increase in the triphosphopyridine nucleotide-requiring triosephosphate dehydrogenase accompanying the illumination of etiolated pea plants”
Claim · model-written summary
Dark-grown leaves on normal pea plants had enzyme activity.
- Taxon
- PeaLathyrus oleraceust0
- Organ / stage
- leavese0
- Outcome
- enzyme activitye0
- Qualifier
- grown in the darke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the presence of enzyme activity in leaves grown in the dark on normal plants”
t0“Pea Leaves”
t1“Pea Leaves”
Claim · model-written summary
Leaves of a chlorophyll-less mutant had high specific enzyme activity.
- Taxon
- PeaLathyrus oleraceust0
- Material
- chlorophyll-less mutante0
- Outcome
- specific enzyme activitye0
- Direction
- highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the high specific enzyme activity in leaves of a chlorophyll-less mutant”
t0“Pea Leaves”
t1“Pea Leaves”
Claim · model-written summary
The light-initiated enzyme activity increase continued for several days after light removal.
- Taxon
- PeaLathyrus oleraceust0
- Outcome
- enzyme activitye0
- Direction
- increasee0
- Qualifier
- for several days after removal from the lighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the light-initiated increase of enzyme activity continues for several days after removal from the light”
t0“Pea Leaves”
t1“Pea Leaves”
Claim · model-written summary
Far-red light before darkness inhibited but did not abolish the enzyme activity increase.
- Taxon
- PeaLathyrus oleraceust0
- Treatment
- illumination with far-red light before the dark periode0
- Outcome
- this increasee0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“illumination with far-red light before the dark period inhibited, but did not abolish, this increase”
t0“Pea Leaves”
t1“Pea Leaves”
Claim · model-written summary
After seven days in darkness, stimulated leaf protein formation was not accompanied by increased enzyme activity.
- Taxon
- PeaLathyrus oleraceust0
- Outcome
- enzyme activitye0
- Direction
- not accompanied by an increasee0
- Qualifier
- after 7 days in the darke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“after 7 days in the dark a stimulation in leaf protein formation was not accompanied by an increase in enzyme activity”
t0“Pea Leaves”
t1“Pea Leaves”