Abstract
Excision of developing potato (Solanum tuberosum L.) tubers from the mother plant, followed by storage at 10 degrees C, resulted in a rapid, substantial decrease in sucrose synthase activity and considerable increases in hexose content and acid invertase activity. A comparison of the response of three genotypes, known to accumulate different quantities of hexoses in storage, showed that both sucrose synthase activity and the extent to which activity declined following excision were similar in all cases. However, there was significant genotypic variation in the extent to which acid invertase activity developed, with tubers accumulating the highest hexose content also developing the highest extractable activity of invertase. Similar effects were found in nondetached tubers when growing plants were maintained in total darkness for a prolonged period. Furthermore, supplying sucrose to detached tubers through the cut stolon surface prevented the decline in sucrose synthase activity. Maltose proved to be ineffective. Western blots using antibodies raised against maize sucrose synthase showed that the decline in sucrose synthase activity was associated with the loss of protein rather than the effect of endogenous inhibitors. Although there were indications that maintaining a flux of sucrose into isolated tubers could prevent the increase in acid invertase activity, the results were not conclusive.
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Claims 9
Claim · model-written summary
Excision and storage decreased sucrose synthase activity in developing potato tubers.
- Taxon
- potato
Solanum tuberosume0 - Organ / stage
- developing potato (Solanum tuberosum L.) tuberse0
- Treatment
- Excisione0
- Gene
- sucrose synthasee0
- Outcome
- sucrose synthase activitye0
- Direction
- decreasee0
- Comparator
- mother plante0
- Setting
- 10 degrees Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Excision of developing potato (Solanum tuberosum L.) tubers from the mother plant, followed by storage at 10 degrees C, resulted in a rapid, substantial decrease in sucrose synthase activity”
Claim · model-written summary
Excision and storage increased hexose content and acid invertase activity in potato tubers.
- Taxon
- potatoSolanum tuberosume0
- Organ / stage
- tuberse0
- Treatment
- Excisione0
- Outcome
- hexose content and acid invertase activitye0
- Direction
- increasese0
- Comparator
- mother plante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Excision of developing potato (Solanum tuberosum L.) tubers from the mother plant, followed by storage at 10 degrees C, resulted in a rapid, substantial decrease in sucrose synthase activity and considerable increases in hexose content and acid invertase activity.”
Claim · model-written summary
Sucrose synthase activity and its decline after excision were similar across three potato genotypes.
- Taxon
- potatoSolanum tuberosumt0
- Gene
- sucrose synthasee0
- Outcome
- sucrose synthase activity and the extent to which activity declinede0
- Direction
- similare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both sucrose synthase activity and the extent to which activity declined following excision were similar in all cases.”
t0“Potato (Solanum tuberosum L.)”
Claim · model-written summary
Acid invertase activity varied significantly among potato genotypes, with highest activity in tubers accumulating most hexose.
- Taxon
- potatoSolanum tuberosumt0
- Organ / stage
- tuberse0
- Gene
- acid invertasee0
- Outcome
- extractable activity of invertasee0
- Direction
- higheste0
- Qualifier
- highest hexose contente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was significant genotypic variation in the extent to which acid invertase activity developed, with tubers accumulating the highest hexose content also developing the highest extractable activity of invertase.”
t0“Potato (Solanum tuberosum L.)”
Claim · model-written summary
Prolonged darkness produced similar effects in attached potato tubers.
- Taxon
- potatoSolanum tuberosumt0
- Organ / stage
- nondetached tuberse0
- Treatment
- total darknesse0
- Outcome
- Similar effectse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Similar effects were found in nondetached tubers when growing plants were maintained in total darkness for a prolonged period.”
t0“Potato (Solanum tuberosum L.)”
Claim · model-written summary
Supplying sucrose to detached potato tubers prevented the decline in sucrose synthase activity.
- Taxon
- potatoSolanum tuberosumt0
- Organ / stage
- detached tuberse0
- Treatment
- supplying sucrosee0
- Gene
- sucrose synthasee0
- Outcome
- sucrose synthase activitye0
- Direction
- prevented the declinee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“supplying sucrose to detached tubers through the cut stolon surface prevented the decline in sucrose synthase activity.”
t0“Potato (Solanum tuberosum L.)”
Claim · model-written summary
Maltose did not prevent the metabolic effect in detached potato tubers.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- Maltosee0
- Outcome
- ineffectivee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maltose proved to be ineffective.”
t0“Potato (Solanum tuberosum L.)”
Claim · model-written summary
Loss of sucrose synthase protein accompanied the decline in its activity, rather than endogenous inhibition.
- Taxon
- potatoSolanum tuberosumt0
- Gene
- sucrose synthasee0
- Outcome
- decline in sucrose synthase activitye0
- Qualifier
- loss of protein rather than the effect of endogenous inhibitorse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the decline in sucrose synthase activity was associated with the loss of protein rather than the effect of endogenous inhibitors.”
t0“Potato (Solanum tuberosum L.)”
Claim · model-written summary
Maintaining sucrose flux might prevent increased acid invertase activity in isolated potato tubers, but evidence was inconclusive.
- Taxon
- potatoSolanum tuberosumt0
- Organ / stage
- isolated tuberse0
- Treatment
- maintaining a flux of sucrosee0
- Outcome
- acid invertase activitye0
- Direction
- prevent the increasee0
- Qualifier
- results were not conclusivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there were indications that maintaining a flux of sucrose into isolated tubers could prevent the increase in acid invertase activity, the results were not conclusive.”
t0“Potato (Solanum tuberosum L.)”
The same questions in other papers
sucrose · physiology: enzyme activity · Solanum tuberosum (potato)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
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.