Abstract
Effects of environmental conditions influencing photosynthesis and photorespiration on senescence and net protein degradation were investigated in segments from the first leaf of young wheat ( Triticum aestivum L. cv. Arina) plants. The segments were floated on H 2 O at 25, 30 or 35°C in continuous light (PAR: 50 or 150 µmol m −2 s −1 ) in ambient air and in CO 2 ‐depleted air. Stromal enzymes, including phosphoglycolate phosphatase, glutamine synthetase, ferredoxin‐dependent glutamate synthase, phosphoribulokinase, and the peroxisomal enzyme, glycolate oxidase, were detected by SDS‐PAGE followed by immunoblotting with specific antibodies. In general, the net degradation of proteins and chlorophylls was delayed in CO 2 ‐depleted air. However, little effect of CO 2 on protein degradation was observed at 25°C under the lower level of irradiance. The senescence retardation by the removal of CO 2 was most pronounced at 30°C and at the higher irradiance. The stromal enzymes declined in a coordinated manner. Immunoreactive fragments from the degraded polypeptides were in most cases not detectable. However, an insolubilized fragment of glycolate oxidase accumulated in vivo, especially at 25°C in the presence of CO 2 . Detection of this fragment was minimal after incubation at 30°C and completely absent on blots from segments kept at 35°C. In CO 2 ‐depleted air, the fragment was only weakly detectable after incubation at 25°C. The results from these investigations indicate that environmental conditions that influence photosynthesis may interfere with senescence and protein catabolism in wheat leaves.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 7
Claim · model-written summary
Net degradation of proteins and chlorophylls was generally delayed in CO2-depleted air in wheat leaf segments.
- Taxon
- Triticum aestivum
Triticum aestivume0 - Treatment
- CO 2 ‐depleted aire1
- Outcome
- net degradation of proteins and chlorophyllse1
- Direction
- delayede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“wheat ( Triticum aestivum L. cv. Arina)”
e1“the net degradation of proteins and chlorophylls was delayed in CO 2 ‐depleted air”
Claim · model-written summary
Little effect of CO2 on protein degradation was observed at 25 C under the lower irradiance.
- Taxon
- Triticum aestivumTriticum aestivume0
- Treatment
- CO 2e1
- Outcome
- protein degradatione1
- Direction
- little effecte1
- Qualifier
- 25°C under the lower level of irradiancee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“wheat ( Triticum aestivum L. cv. Arina)”
e1“little effect of CO 2 on protein degradation was observed at 25°C under the lower level of irradiance”
Claim · model-written summary
Senescence retardation by CO2 removal was most pronounced at 30 C and at the higher irradiance.
- Taxon
- Triticum aestivumTriticum aestivume0
- Treatment
- removal of CO 2e1
- Outcome
- senescence retardatione1
- Direction
- most pronouncede1
- Qualifier
- 30°C and at the higher irradiancee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“wheat ( Triticum aestivum L. cv. Arina)”
e1“The senescence retardation by the removal of CO 2 was most pronounced at 30°C and at the higher irradiance”
Claim · model-written summary
The stromal enzymes declined in a coordinated manner in wheat leaf segments.
- Taxon
- Triticum aestivumTriticum aestivume0
- Outcome
- stromal enzymes declined in a coordinated mannere1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“wheat ( Triticum aestivum L. cv. Arina)”
e1“The stromal enzymes declined in a coordinated manner”
Claim · model-written summary
An insolubilized fragment of glycolate oxidase accumulated in vivo, especially at 25 C in the presence of CO2.
- Taxon
- Triticum aestivumTriticum aestivume0
- Outcome
- insolubilized fragment of glycolate oxidase accumulated in vivoe1
- Qualifier
- 25°C in the presence of CO 2e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“wheat ( Triticum aestivum L. cv. Arina)”
e1“an insolubilized fragment of glycolate oxidase accumulated in vivo, especially at 25°C in the presence of CO 2”
Claim · model-written summary
Detection of the glycolate oxidase fragment was minimal after incubation at 30 C and completely absent at 35 C.
- Taxon
- Triticum aestivumTriticum aestivume0
- Outcome
- Detection of this fragmente1
- Qualifier
- minimal after incubation at 30°C and completely absent on blots from segments kept at 35°Ce1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“wheat ( Triticum aestivum L. cv. Arina)”
e1“Detection of this fragment was minimal after incubation at 30°C and completely absent on blots from segments kept at 35°C”
Claim · model-written summary
In CO2-depleted air the fragment was only weakly detectable after incubation at 25 C.
- Taxon
- Triticum aestivumTriticum aestivume0
- Outcome
- the fragment was only weakly detectablee1
- Qualifier
- CO 2 ‐depleted aire1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“wheat ( Triticum aestivum L. cv. Arina)”
e1“In CO 2 ‐depleted air, the fragment was only weakly detectable after incubation at 25°C”
The same questions in other papers
co2 · quality: protein · Triticum aestivum (wheat)Results differ
28 papers in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- positive
28 papers more in this group
See all 32 papers →co2 · quality: postharvest · Triticum aestivum (wheat)Positive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
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.