Abstract
A soybean suspension culture (SB-P) which can grow photoautotrophically in 5% CO(2) will not grow in ambient CO(2) levels. This elevated CO(2) requirement seems to be due to the additive effects of a number of factors. The in vivo activity of ribulose-1,5-bisphosphate carboxylase (RuBPcase) is much lower in the SB-P cells, compared to soybean plants. This may be due to the low light intensity used to culture the cells, which has been shown to decrease both the amount and activity in whole plants, resulting in a low rate of net photosynthesis. The RuBPcase activation level is also lowered in air CO(2) levels. The presence of the liquid medium raises the cells CO(2) compensation concentration (the CO(2) concentration reached when the rates of CO(2) fixed by photosynthesis and the CO(2) respired by the cells are equal). These factors, coupled with the high respiratory loss of CO(2) all contribute to reduced net photosynthesis in air, resulting in a photosynthetic capacity that is inadequate for cell survival. Active cell division, low photosynthetic capacity, elevated respiration, and a low ratio of RuBPcase(initial)/phosphoenolpyruvate carboxylase are traits that SB-P cells share with young leaf cells, indicating SB-P cell physiology may be comparable to that of young expanding leaves rather than to that of mature leaves.
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Claims 6
Claim · model-written summary
SB-P soybean cells grow photoautotrophically at 5% CO2 but fail to grow at ambient CO2.
- Taxon
- soybean
Glycine maxe0 - Material
- SB-Pe0
- Outcome
- grow photoautotrophicallye0
- Qualifier
- 5% CO(2)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A soybean suspension culture (SB-P) which can grow photoautotrophically in 5% CO(2) will not grow in ambient CO(2) levels.”
Claim · model-written summary
RuBPcase activity is much lower in SB-P cells than in soybean plants.
- Taxon
- soybeanGlycine maxe0
- Material
- SB-Pe0
- Gene
- ribulose-1,5-bisphosphate carboxylase (RuBPcase)e0
- Outcome
- in vivo activitye0
- Direction
- much lowere0
- Comparator
- soybean plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The in vivo activity of ribulose-1,5-bisphosphate carboxylase (RuBPcase) is much lower in the SB-P cells, compared to soybean plants.”
Claim · model-written summary
RuBPcase activation is lower at air CO2 levels.
- Taxon
- SoybeanGlycine maxt0
- Gene
- RuBPcasee0
- Outcome
- RuBPcase activation levele0
- Direction
- lowerede0
- Qualifier
- air CO(2) levelse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The RuBPcase activation level is also lowered in air CO(2) levels.”
t0“Soybean”
Claim · model-written summary
Liquid medium raises the CO2 compensation concentration of soybean cells.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- liquid mediume0
- Outcome
- cells CO(2) compensation concentratione0
- Direction
- raisese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The presence of the liquid medium raises the cells CO(2) compensation concentration”
t0“Soybean”
Claim · model-written summary
The reported factors and respiratory CO2 loss reduce net photosynthesis in air.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- reduced net photosynthesis in aire0
- Direction
- reducede0
- Qualifier
- high respiratory loss of CO(2)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These factors, coupled with the high respiratory loss of CO(2) all contribute to reduced net photosynthesis in air, resulting in a photosynthetic capacity that is inadequate for cell survival.”
t0“Soybean”
Claim · model-written summary
SB-P cell physiology resembles young expanding leaves more than mature leaves.
- Taxon
- SoybeanGlycine maxt0
- Material
- SB-Pe0
- Outcome
- SB-P cell physiologye0
- Qualifier
- may be comparable to that of young expanding leavese0
- Comparator
- mature leavese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Active cell division, low photosynthetic capacity, elevated respiration, and a low ratio of RuBPcase(initial)/phosphoenolpyruvate carboxylase are traits that SB-P cells share with young leaf cells, indicating SB-P cell physiology may be comparable to that of young expanding leaves rather than to that of mature leaves.”
t0“Soybean”
The same questions in other papers
in vitro · molecular: metabolites · Glycine max (soybean)Positive and negative results
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See all 13 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.