Abstract
Catabolism of storage reserves and biosynthesis of metabolites necessary for growth are essential for seed germination and establishment. An Arabidopsis (Arabidopsis thaliana) mutant (pkp1) deficient in plastidic pyruvate kinase (PK(p)) and unable to accumulate storage oil to the same extent as the wild type shows delayed germination and seedling establishment dependent on an exogenous sugar supply. It appears, however, as though these phenotypes are not entirely caused specifically by lack of seed oil and may be related to reduced PK(p) activity in germinating seeds. Increasing the sucrose concentration in the medium further inhibits germination of pkp1, possibly due to the accumulation of soluble sugars in seeds. Germinating seeds of pkp1 are unable to metabolize storage oil and cannot utilize applied sucrose for hypocotyl elongation in the dark. Moreover, pkp1 contains less tocopherol and chlorophyll than the wild type. Taken together, the results are consistent with a model in which PK(p) is required for the efficient conversion of sugar into precursors for different anabolic pathways.
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Claims 7
Claim · model-written summary
The pkp1 mutant accumulated less storage oil than wild type.
- Taxon
- Arabidopsis
Arabidopsist0 - Material
- pkp1e0
- Outcome
- mutant (pkp1) deficient in plastidic pyruvate kinase (PK(p)) and unable to accumulate storage oil to the same extent as the wild typee0
- Direction
- unablee0
- Comparator
- wild typee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mutant (pkp1) deficient in plastidic pyruvate kinase (PK(p)) and unable to accumulate storage oil to the same extent as the wild type”
t0“Arabidopsis Seedlings”
Claim · model-written summary
The pkp1 mutant had delayed germination and sugar-dependent establishment.
- Taxon
- ArabidopsisArabidopsist0
- Material
- pkp1e0
- Treatment
- exogenous sugar supplye0
- Outcome
- mutant (pkp1) deficient in plastidic pyruvate kinase (PK(p)) and unable to accumulate storage oil to the same extent as the wild type shows delayed germination and seedling establishment dependent on an exogenous sugar supplye0
- Direction
- delayede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mutant (pkp1) deficient in plastidic pyruvate kinase (PK(p)) and unable to accumulate storage oil to the same extent as the wild type shows delayed germination and seedling establishment dependent on an exogenous sugar supply”
t0“Arabidopsis Seedlings”
Claim · model-written summary
Increasing sucrose further inhibited pkp1 germination.
- Taxon
- ArabidopsisArabidopsist0
- Material
- pkp1e0
- Treatment
- Increasing the sucrose concentratione0
- Outcome
- Increasing the sucrose concentration in the medium further inhibits germination of pkp1e0
- Direction
- inhibitse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing the sucrose concentration in the medium further inhibits germination of pkp1”
t0“Arabidopsis Seedlings”
Claim · model-written summary
Germinating pkp1 seeds could not metabolize storage oil.
- Taxon
- ArabidopsisArabidopsist0
- Material
- pkp1e0
- Organ / stage
- Germinating seedse0
- Outcome
- Germinating seeds of pkp1 are unable to metabolize storage oile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Germinating seeds of pkp1 are unable to metabolize storage oil”
t0“Arabidopsis Seedlings”
Claim · model-written summary
Germinating pkp1 seeds could not use applied sucrose for dark hypocotyl elongation.
- Taxon
- ArabidopsisArabidopsist0
- Organ / stage
- hypocotyle0
- Treatment
- applied sucrosee0
- Outcome
- cannot utilize applied sucrose for hypocotyl elongation in the darke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cannot utilize applied sucrose for hypocotyl elongation in the dark”
t0“Arabidopsis Seedlings”
Claim · model-written summary
pkp1 had less tocopherol and chlorophyll than wild type.
- Taxon
- ArabidopsisArabidopsist0
- Material
- pkp1e0
- Outcome
- pkp1 contains less tocopherol and chlorophyll than the wild typee0
- Direction
- lesse0
- Comparator
- wild typee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pkp1 contains less tocopherol and chlorophyll than the wild type”
t0“Arabidopsis Seedlings”
Claim · model-written summary
Authors propose PK(p) is required for efficient conversion of sugar into anabolic precursors.
- Taxon
- ArabidopsisArabidopsist0
- Gene
- PK(p)e0
- Outcome
- PK(p) is required for the efficient conversion of sugar into precursors for different anabolic pathwayse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PK(p) is required for the efficient conversion of sugar into precursors for different anabolic pathways”
t0“Arabidopsis Seedlings”
The same questions in other papers
sucrose · growth · ArabidopsisPositive and negative results
7 papers in the same direction as this paper · 9 in the opposite direction
- positive
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See all 17 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.