Claim · model-written summary
Tubers with reduced plastidial PGM activity had significantly increased hexose phosphate levels.
- Taxon
- potato
Solanum tuberosumt0 - Organ / stage
- tuberse0
- Gene
- plastidial phosphoglucomutaset0
- Outcome
- hexose phosphatese0
- Direction
- increasese0
Not reportedMaterialCompoundInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, tubers from these lines exhibited a dramatic (up to 40%) decrease in the accumulation of starch, and significant increases in the levels of sucrose and hexose phosphates.”
t0“plastidial phosphoglucomutase provides compelling evidence that potato”
Title
Eva Tauberger; Alisdair R. Fernie; Michael Emmermann; et al. The Plant Journal 2000. doi:10.1046/j.1365-313x.2000.00783.x
Other claims from this paper (10)
- Observation The potato plastidial PGM isoform StpPGM was cloned.
- Intervention effect Antisense potato plants showed decreased StpPGM gene expression.
- Intervention effect Antisense potato plants had significantly reduced total phosphoglucomutase activity.
- Observation The loss of activity was specifically a reduction in plastidial PGM activity.
- Association Potato lines with reduced plastidial PGM activity had no major changes in whole plant or tuber morphology.
- Association Tubers with reduced plastidial PGM activity accumulated up to 40% less starch.
- Association Tubers with reduced plastidial PGM activity had significantly increased sucrose levels.
- Observation Other key carbohydrate metabolism enzymes had unchanged maximal catalytic activities in tubers from the antisense lines.
- Mechanism The authors conclude that plastidial PGM participates in potato tuber starch biosynthesis.
- Mechanism The authors conclude that glucose-6-phosphate is the major carbon precursor imported into amyloplasts for starch synthesis.