Abstract
The activity of invertase and its relation to growth were studied in the epicotyls of lentil seedlings incubated in the presence and absence of gibberellic acid (GA(3)).Invertase activity per epicotyl increases relatively more rapidly than does length, reaches a maximum during most active elongation, and declines upon cessation of growth.GA(3) enhances both growth and increase in invertase activity, without altering the kinetics of the 2 processes. If GA(3) is added during incubation invertase activity increases more rapidly than does elongation rate.Incubation of the seedlings in solutions of polyethyleneglycol inhibits the increase of both growth and invertase activity, the latter actually undergoing a decline, but causes no great change in the relative effect of GA(3). In presence of polyethyleneglycol GA(3) has however a relatively greater effect on invertase activity than on growth.Sugars in the incubation medium have no significant effect on growth and invertase activity in the epicotyl, except inhibition at relatively high concentrations.Cycloheximide, actinomycin D, and 5-fluorodeoxyuridine (FUDR) inhibit both growth and the increase in invertase activity. Added during incubation cycloheximide causes complete inhibition of growth and a decrease in invertase activity with no appreciable lag phase. With actinomycin D and FUDR the inhibition occurs after lag periods of 2 to 3 and of at least 10 hours, respectively. Thus the increase in enzyme activity is very probably based on de-novo synthesis, and the enzyme is in a state of turnover during growth.The enzyme is present in soluble form in the cytoplasm, not firmly bound to any cell structures.
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Claims 18
Claim · model-written summary
Invertase activity increased faster than epicotyl length, peaked during active elongation and declined after growth ceased.
- Taxon
- Lentil
Lens culinarist0 - Organ / stage
- epicotyle0
- Gene
- Invertasee0
- Outcome
- Invertase activity per epicotyle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Invertase activity per epicotyl increases relatively more rapidly than does length, reaches a maximum during most active elongation, and declines upon cessation of growth.”
t0“Lentil”
Claim · model-written summary
GA(3) enhanced epicotyl growth.
- Taxon
- LentilLens culinarist0
- Treatment
- GA(3)e0
- Outcome
- growthe0
- Direction
- enhancese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“GA(3) enhances both growth and increase in invertase activity, without altering the kinetics of the 2 processes.”
t0“Lentil”
Claim · model-written summary
GA(3) enhanced the increase in invertase activity.
- Taxon
- LentilLens culinarist0
- Treatment
- GA(3)e0
- Outcome
- invertase activitye0
- Direction
- enhancese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“GA(3) enhances both growth and increase in invertase activity, without altering the kinetics of the 2 processes.”
t0“Lentil”
Claim · model-written summary
GA(3) did not alter growth and invertase activity kinetics.
- Taxon
- LentilLens culinarist0
- Treatment
- GA(3)e0
- Outcome
- kinetics of the 2 processese0
- Direction
- without alteringe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“GA(3) enhances both growth and increase in invertase activity, without altering the kinetics of the 2 processes.”
t0“Lentil”
Claim · model-written summary
During incubation, GA(3) increased invertase activity faster than elongation rate.
- Taxon
- LentilLens culinarist0
- Treatment
- GA(3)e0
- Outcome
- invertase activitye0
- Direction
- more rapidlye0
- Comparator
- elongation ratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“If GA(3) is added during incubation invertase activity increases more rapidly than does elongation rate.”
t0“Lentil”
Claim · model-written summary
Polyethyleneglycol inhibited growth increase.
- Taxon
- LentilLens culinarist0
- Treatment
- polyethyleneglycole0
- Outcome
- growthe0
- Direction
- inhibitse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Incubation of the seedlings in solutions of polyethyleneglycol inhibits the increase of both growth and invertase activity, the latter actually undergoing a decline, but causes no great change in the relative effect of GA(3).”
t0“Lentil”
Claim · model-written summary
Polyethyleneglycol caused invertase activity to decline.
- Taxon
- LentilLens culinarist0
- Treatment
- polyethyleneglycole0
- Outcome
- invertase activitye0
- Direction
- declinee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Incubation of the seedlings in solutions of polyethyleneglycol inhibits the increase of both growth and invertase activity, the latter actually undergoing a decline, but causes no great change in the relative effect of GA(3).”
t0“Lentil”
Claim · model-written summary
Polyethyleneglycol did not greatly change the relative GA(3) effect.
- Taxon
- LentilLens culinarist0
- Treatment
- polyethyleneglycole0
- Outcome
- relative effect of GA(3)e0
- Direction
- no great changee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Incubation of the seedlings in solutions of polyethyleneglycol inhibits the increase of both growth and invertase activity, the latter actually undergoing a decline, but causes no great change in the relative effect of GA(3).”
t0“Lentil”
Claim · model-written summary
With polyethyleneglycol, GA(3) affected invertase activity more than growth.
- Taxon
- LentilLens culinarist0
- Treatment
- GA(3)e0
- Outcome
- invertase activitye0
- Direction
- greatere0
- Qualifier
- In presence of polyethyleneglycole0
- Comparator
- growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In presence of polyethyleneglycol GA(3) has however a relatively greater effect on invertase activity than on growth.”
t0“Lentil”
Claim · model-written summary
Sugars generally had no significant effect on epicotyl growth or invertase activity, except inhibition at high concentration.
- Taxon
- LentilLens culinarist0
- Treatment
- Sugarse0
- Outcome
- growth and invertase activitye0
- Direction
- no significant effecte0
- Qualifier
- except inhibition at relatively high concentrationse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugars in the incubation medium have no significant effect on growth and invertase activity in the epicotyl, except inhibition at relatively high concentrations.”
t0“Lentil”
Claim · model-written summary
Cycloheximide inhibited growth and the increase in invertase activity.
- Taxon
- LentilLens culinarist0
- Treatment
- Cycloheximidee0
- Outcome
- growth and the increase in invertase activitye0
- Direction
- inhibite0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cycloheximide, actinomycin D, and 5-fluorodeoxyuridine (FUDR) inhibit both growth and the increase in invertase activity.”
t0“Lentil”
Claim · model-written summary
actinomycin D inhibited growth and the increase in invertase activity.
- Taxon
- LentilLens culinarist0
- Treatment
- actinomycin De0
- Outcome
- growth and the increase in invertase activitye0
- Direction
- inhibite0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cycloheximide, actinomycin D, and 5-fluorodeoxyuridine (FUDR) inhibit both growth and the increase in invertase activity.”
t0“Lentil”
Claim · model-written summary
5-fluorodeoxyuridine (FUDR) inhibited growth and the increase in invertase activity.
- Taxon
- LentilLens culinarist0
- Treatment
- 5-fluorodeoxyuridine (FUDR)e0
- Outcome
- growth and the increase in invertase activitye0
- Direction
- inhibite0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cycloheximide, actinomycin D, and 5-fluorodeoxyuridine (FUDR) inhibit both growth and the increase in invertase activity.”
t0“Lentil”
Claim · model-written summary
Added cycloheximide completely inhibited growth and reduced invertase activity without appreciable lag.
- Taxon
- LentilLens culinarist0
- Treatment
- cycloheximidee0
- Outcome
- growth and a decrease in invertase activitye0
- Direction
- complete inhibitione0
- Qualifier
- no appreciable lag phasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Added during incubation cycloheximide causes complete inhibition of growth and a decrease in invertase activity with no appreciable lag phase.”
t0“Lentil”
Claim · model-written summary
Actinomycin D inhibition began after a 2 to 3 hour lag.
- Taxon
- LentilLens culinarist0
- Treatment
- actinomycin De0
- Outcome
- inhibitione0
- Direction
- inhibitione0
- Value
- 2 to 3e0
- Qualifier
- lag periodse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With actinomycin D and FUDR the inhibition occurs after lag periods of 2 to 3 and of at least 10 hours, respectively.”
t0“Lentil”
Claim · model-written summary
FUDR inhibition began after at least 10 hours.
- Taxon
- LentilLens culinarist0
- Treatment
- FUDRe0
- Outcome
- inhibitione0
- Direction
- inhibitione0
- Value
- at least 10 hourse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With actinomycin D and FUDR the inhibition occurs after lag periods of 2 to 3 and of at least 10 hours, respectively.”
t0“Lentil”
Claim · model-written summary
The authors infer that invertase activity increases through de novo synthesis and the enzyme turns over during growth.
- Taxon
- LentilLens culinarist0
- Outcome
- increase in enzyme activitye0
- Qualifier
- de-novo synthesise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Thus the increase in enzyme activity is very probably based on de-novo synthesis, and the enzyme is in a state of turnover during growth.”
t0“Lentil”
Claim · model-written summary
Invertase was soluble in the cytoplasm rather than firmly bound to cell structures.
- Taxon
- LentilLens culinarist0
- Organ / stage
- cytoplasme0
- Outcome
- soluble form in the cytoplasme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The enzyme is present in soluble form in the cytoplasm, not firmly bound to any cell structures.”
t0“Lentil”
The same questions in other papers
poly(ethylene glycol) · growth · Lens culinaris (lentil)Results agree
1 paper in the same direction as this paper
- no effect
Gibberellic acid · growth · Lens culinaris (lentil)Results agree
7 papers in the same direction as this paper
- positive
- positive
- positive
4 papers more in this group
See all 8 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.