Abstract
Changes in endogenous cytokinin (CK) content and cytokinin oxidase/dehydrogenase activity (CKX) in response to gibberellic acid (GA3) in two pea cultivars with different life span were assessed. The control leaves of cv. Scinado, which developed faster, had higher initial cytokinin content and lower CKX activity, while opposite trend was observed in cv. Manuela with longer life span. Increased CKX and decreased CK content were detected in leaves of cv. Scinado after treatments with 0.5, 1 and 5 µM GA3. Changes in CK content and CKX activity in GA3-treated cv. Manuela leaves were reciprocal to those in cv. Scinado. CK content and CKX activity in roots were not significantly influenced by the application of GA3. The slight repression of CKX activity in some of the root samples was accompanied by increased isopentenyladenine and isopentenyladenine riboside content. Obtained results suggest that CKX was responsible for the changes in endogenous cytokinin pool in GA3-treated plants and most probably this enzyme represents an important link in GA/cytokinin cross talk.
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Claims 9
Claim · model-written summary
Control leaves of cv. Scinado had higher initial cytokinin content than cv. Manuela.
- Taxon
- pea
Lathyrus oleraceuse0 - Material
- cv. Scinadoe1
- Organ / stage
- control leavese1
- Outcome
- cytokinin contente1
- Direction
- highere1
- Qualifier
- initiale1
- Comparator
- cv. Manuelae2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in response to gibberellic acid (GA3) in two pea cultivars with different life span”
e1“The control leaves of cv. Scinado, which developed faster, had higher initial cytokinin content and lower CKX activity”
e2“while opposite trend was observed in cv. Manuela with longer life span”
Claim · model-written summary
Control leaves of cv. Scinado had lower CKX activity than cv. Manuela.
- Taxon
- peaLathyrus oleraceuse0
- Material
- cv. Scinadoe1
- Gene
- cytokinin oxidase/dehydrogenasee4
- Outcome
- CKX activitye1
- Direction
- lowere1
- Comparator
- cv. Manuelae2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in response to gibberellic acid (GA3) in two pea cultivars with different life span”
e1“The control leaves of cv. Scinado, which developed faster, had higher initial cytokinin content and lower CKX activity”
e2“while opposite trend was observed in cv. Manuela with longer life span”
e4“cytokinin oxidase/dehydrogenase activity (CKX)”
Claim · model-written summary
GA3 increased CKX activity in cv. Scinado leaves relative to control leaves.
- Taxon
- peaLathyrus oleraceuse0
- Material
- cv. Scinadoe3
- Treatment
- GA3e0
- Gene
- cytokinin oxidase/dehydrogenasee4
- Outcome
- CKXe3
- Direction
- Increasede3
- Comparator
- control leavese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in response to gibberellic acid (GA3) in two pea cultivars with different life span”
e1“The control leaves of cv. Scinado, which developed faster, had higher initial cytokinin content and lower CKX activity”
e3“Increased CKX and decreased CK content were detected in leaves of cv. Scinado after treatments with 0.5, 1 and 5”
e4“cytokinin oxidase/dehydrogenase activity (CKX)”
Claim · model-written summary
GA3 decreased cytokinin content in cv. Scinado leaves relative to control leaves.
- Taxon
- peaLathyrus oleraceuse0
- Material
- cv. Scinadoe3
- Treatment
- GA3e0
- Outcome
- CK contente3
- Direction
- decreasede3
- Comparator
- control leavese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in response to gibberellic acid (GA3) in two pea cultivars with different life span”
e1“The control leaves of cv. Scinado, which developed faster, had higher initial cytokinin content and lower CKX activity”
e3“Increased CKX and decreased CK content were detected in leaves of cv. Scinado after treatments with 0.5, 1 and 5”
Claim · model-written summary
In cv. Manuela, GA3 changed CK content and CKX activity in the opposite direction to cv. Scinado.
- Taxon
- peaLathyrus oleraceuse0
- Material
- cv. Manuelae4
- Treatment
- GA3e4
- Outcome
- CK content and CKX activitye4
- Direction
- reciprocale4
- Comparator
- cv. Scinadoe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in response to gibberellic acid (GA3) in two pea cultivars with different life span”
e4“Changes in CK content and CKX activity in GA3-treated cv. Manuela leaves were reciprocal to those in cv. Scinado”
Claim · model-written summary
GA3 did not significantly change CK content or CKX activity in roots.
- Taxon
- peaLathyrus oleraceuse0
- Organ / stage
- rootse5
- Treatment
- application of GA3e5
- Outcome
- CK content and CKX activitye5
- Direction
- not significantly influencede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in response to gibberellic acid (GA3) in two pea cultivars with different life span”
e5“CK content and CKX activity in roots were not significantly influenced by the application of GA3”
Claim · model-written summary
A slight repression of CKX activity occurred in some root samples.
- Taxon
- peaLathyrus oleraceuse0
- Organ / stage
- root samplese6
- Outcome
- CKX activitye6
- Direction
- repressione6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in response to gibberellic acid (GA3) in two pea cultivars with different life span”
e6“The slight repression of CKX activity in some of the root samples was accompanied by increased isopentenyladenine and isopentenyladenine riboside content”
Claim · model-written summary
Isopentenyladenine and isopentenyladenine riboside content increased in root samples with the CKX repression.
- Taxon
- peaLathyrus oleraceuse0
- Organ / stage
- root samplese6
- Outcome
- isopentenyladenine and isopentenyladenine riboside contente6
- Direction
- increasede6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in response to gibberellic acid (GA3) in two pea cultivars with different life span”
e6“The slight repression of CKX activity in some of the root samples was accompanied by increased isopentenyladenine and isopentenyladenine riboside content”
Claim · model-written summary
CKX is responsible for the changes in endogenous cytokinin pool in GA3-treated pea plants.
- Taxon
- peaLathyrus oleraceuse0
- Treatment
- GA3-treated plantse7
- Gene
- CKXe7
- Outcome
- changes in endogenous cytokinin poole7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in response to gibberellic acid (GA3) in two pea cultivars with different life span”
e7“CKX was responsible for the changes in endogenous cytokinin pool in GA3-treated plants”
The same questions in other papers
Gibberellic acid · physiology: hormones · Lathyrus oleraceus (pea)Results agree
3 papers in the same direction as this paper
- no effect
- no effect
- no effect
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.