Abstract
Theactivity ofpectin esterase andcellulase inabscission ofcitrus explants was studied. No relation wasestablished between pectin esterase andabscission, whilecellulase activity wasmarkedly increased before absoission andforacertain period after excision. IAA andcycloheximide delay abscission andcellulase activity, whileethylene and, toalesser extent, GA.acoelerate them.Application ofcycloheximide during thelagperiod andbefore cellulase activity canbemeasured, inhibits toacertain extent theformation of'cellulase An escape fromtheinhibitory effect ofcycloheximide isdetected wheninhibitor issupplied attheend ofthe-lag period. Mostofthestudies onabscission werecarried out on leafexplants ofannualplants, suchas bean, cotton, coleus, etc.Recently, Lewis(16,17) studied theeffects ofGA8andIAA on thealbscission of citrus leaf explants, andshowed thattheacceleration ofabscission byGA3isprobably duetostimulation ofprotein synthesis, whileIAAmaintains therate ofprotein synthesis inthecells oftheabscission zone.Thesefindings arecompatible withthere- sults reported byAbeles (4), whoshowedthatthe abscission process ischaracterized bydenovo synthesis ofRNA andprotein. Bothauthors believe thattheincrease inprotein synthesis isdueto
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Claims 8
Claim · model-written summary
Pectin esterase showed no established relation to citrus explant abscission.
CitrusOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Citrus LeafExplants”
e0“No relation wasestablished between pectin esterase andabscission”
Claim · model-written summary
Cellulase activity markedly increased before abscission and for a period after excision.
- Gene
- cellulasee0
- Outcome
- cellulase activitye0
- Direction
- increasede0
- Qualifier
- before absoission andforacertain period after excisione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Citrus LeafExplants”
e0“cellulase activity wasmarkedly increased before absoission andforacertain period after excision”
Claim · model-written summary
IAA delayed abscission and cellulase activity.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Citrus LeafExplants”
e0“IAA andcycloheximide delay abscission andcellulase activity”
Claim · model-written summary
Cycloheximide delayed abscission and cellulase activity.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Citrus LeafExplants”
e0“IAA andcycloheximide delay abscission andcellulase activity”
Claim · model-written summary
Ethylene accelerated abscission and cellulase activity.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Citrus LeafExplants”
e0“ethylene and, toalesser extent, GA.acoelerate them”
e1“IAA andcycloheximide delay abscission andcellulase activity”
Claim · model-written summary
GA accelerated abscission and cellulase activity to a lesser extent than ethylene.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Citrus LeafExplants”
e0“ethylene and, toalesser extent, GA.acoelerate them”
e1“IAA andcycloheximide delay abscission andcellulase activity”
Claim · model-written summary
Cycloheximide applied during the lag period before measurable cellulase activity partly inhibited cellulase formation.
- Treatment
- cycloheximidee0
- Outcome
- formation of'cellulasee0
- Direction
- inhibitse0
- Qualifier
- during thelagperiod andbefore cellulase activity canbemeasurede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Citrus LeafExplants”
e0“Application ofcycloheximide during thelagperiod andbefore cellulase activity canbemeasured, inhibits toacertain extent theformation of'cellulase”
Claim · model-written summary
The inhibition by cycloheximide could be escaped when it was supplied at the end of the lag period.
- Treatment
- cycloheximidee0
- Outcome
- escape fromtheinhibitory effecte0
- Qualifier
- attheend ofthe-lag periode0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Citrus LeafExplants”
e0“An escape fromtheinhibitory effect ofcycloheximide isdetected wheninhibitor issupplied attheend ofthe-lag period.”
The same questions in other papers
cycloheximide · physiology: enzyme activity · CitrusPositive and negative results
1 in the opposite direction
- positive
ethene · physiology: enzyme activity · CitrusPositive and negative results
1 paper in the same direction as this paper · 3 in the opposite direction
- no effect
- no effect
- no effect
1 paper more in this group
See all 5 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.