Abstract
The levels of beta-amylase activity and of the mRNA for beta-amylase in rosette leaves of Arabidopsis thaliana (L.) Heynh. increased significantly, with the concomitant accumulation of starch, when whole plants or excised mature leaves were supplied with sucrose. A supply of glucose or fructose, but not of mannitol or sorbitol, to plants also induced the expression of the gene for beta-amylase, and the induction occurred not only in rosette leaves but also in roots, stems, and bracts. These results suggest that the gene for beta-amylase of Arabidopsis is subject to regulation by a carbohydrate metabolic signal, and expression of the gene in various tissues may be regulated by the carbon partitioning and sink-source interactions in the whole plant. The sugar-inducible expression of the gene in Arabidopsis was severely repressed in the absence of light. The sugar-inducible expression in the light was not inhibited by 3(3,4-dichlorophenyl)-1,1-dimethylurea or by chloramphenicol, but it was inhibited by cycloheximide. These results suggest that a light-induced signal and de novo synthesis of proteins in the cytoplasm are involved in the regulation. A fusion gene composed of the 5' upstream region of the gene for beta-amylase from Arabidopsis and the coding sequence of beta-glucuronidase showed the sugar-inducible expression in a light-dependent manner in rosette leaves of transgenic Arabidopsis.
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Claims 15
Claim · model-written summary
Sucrose significantly increased leaf beta-amylase activity.
- Taxon
- Arabidopsis thaliana (L.) Heynh.
Arabidopsis thalianae0 - Treatment
- sucrosee0
- Gene
- beta-amylasee0
- Outcome
- beta-amylase activitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The levels of beta-amylase activity and of the mRNA for beta-amylase in rosette leaves of Arabidopsis thaliana (L.) Heynh. increased significantly, with the concomitant accumulation of starch, when whole plants or excised mature leaves were supplied with sucrose.”
e1“Arabidopsis thaliana (L.) Heynh.”
Claim · model-written summary
Sucrose significantly increased beta-amylase mRNA.
- Taxon
- Arabidopsis thaliana (L.) Heynh.Arabidopsis thalianae0
- Treatment
- sucrosee0
- Gene
- beta-amylasee0
- Outcome
- mRNA for beta-amylasee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The levels of beta-amylase activity and of the mRNA for beta-amylase in rosette leaves of Arabidopsis thaliana (L.) Heynh. increased significantly, with the concomitant accumulation of starch, when whole plants or excised mature leaves were supplied with sucrose.”
e1“Arabidopsis thaliana (L.) Heynh.”
Claim · model-written summary
Starch accumulated with sucrose supply.
- Taxon
- Arabidopsis thaliana (L.) Heynh.Arabidopsis thalianae1
- Treatment
- sucrosee0
- Outcome
- accumulation of starche0
- Direction
- accumulatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with the concomitant accumulation of starch, when whole plants or excised mature leaves were supplied with sucrose.”
e1“Arabidopsis thaliana (L.) Heynh.”
Claim · model-written summary
Glucose induced beta-amylase gene expression.
- Taxon
- Arabidopsis thaliana (L.) Heynh.Arabidopsis thalianae1
- Treatment
- glucosee0
- Gene
- beta-amylasee0
- Outcome
- expression of the gene for beta-amylasee0
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A supply of glucose or fructose, but not of mannitol or sorbitol, to plants also induced the expression of the gene for beta-amylase”
e1“Arabidopsis thaliana (L.) Heynh.”
Claim · model-written summary
Fructose induced beta-amylase gene expression.
- Taxon
- Arabidopsis thaliana (L.) Heynh.Arabidopsis thalianae1
- Treatment
- fructosee0
- Gene
- beta-amylasee0
- Outcome
- expression of the gene for beta-amylasee0
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A supply of glucose or fructose, but not of mannitol or sorbitol, to plants also induced the expression of the gene for beta-amylase”
e1“Arabidopsis thaliana (L.) Heynh.”
Claim · model-written summary
Mannitol did not induce beta-amylase expression.
- Taxon
- Arabidopsis thaliana (L.) Heynh.Arabidopsis thalianae1
- Treatment
- mannitole0
- Gene
- beta-amylasee0
- Outcome
- expression of the gene for beta-amylasee0
- Direction
- no_changeinferrede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but not of mannitol or sorbitol, to plants also induced the expression of the gene for beta-amylase”
e1“Arabidopsis thaliana (L.) Heynh.”
Claim · model-written summary
Sorbitol did not induce beta-amylase expression.
- Taxon
- Arabidopsis thaliana (L.) Heynh.Arabidopsis thalianae1
- Treatment
- sorbitole0
- Gene
- beta-amylasee0
- Outcome
- expression of the gene for beta-amylasee0
- Direction
- no_changeinferrede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but not of mannitol or sorbitol, to plants also induced the expression of the gene for beta-amylase”
e1“Arabidopsis thaliana (L.) Heynh.”
Claim · model-written summary
Induction occurred in roots, stems and bracts as well as leaves.
- Taxon
- Arabidopsis thaliana (L.) Heynh.Arabidopsis thalianae1
- Organ / stage
- roots, stems, and bractse0
- Outcome
- inductione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the induction occurred not only in rosette leaves but also in roots, stems, and bracts.”
e1“Arabidopsis thaliana (L.) Heynh.”
Claim · model-written summary
The authors infer carbohydrate signaling and source sink regulation.
- Taxon
- ArabidopsisArabidopsise0
- Gene
- beta-amylasee0
- Outcome
- expression of the genee0
- Qualifier
- carbohydrate metabolic signale0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the gene for beta-amylase of Arabidopsis is subject to regulation by a carbohydrate metabolic signal, and expression of the gene in various tissues may be regulated by the carbon partitioning and sink-source interactions in the whole plant.”
e1“beta-amylase of Arabidopsis”
Claim · model-written summary
Absence of light severely repressed sugar inducible expression.
- Taxon
- ArabidopsisArabidopsise0
- Treatment
- absence of lighte0
- Outcome
- sugar-inducible expressione0
- Direction
- severely repressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sugar-inducible expression of the gene in Arabidopsis was severely repressed in the absence of light.”
e1“the gene in Arabidopsis”
Claim · model-written summary
DCMU did not inhibit expression in light.
- Taxon
- Arabidopsis thaliana (L.) Heynh.Arabidopsis thalianae1
- Treatment
- 3(3,4-dichlorophenyl)-1,1-dimethylureae0
- Outcome
- sugar-inducible expressione0
- Direction
- not inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sugar-inducible expression in the light was not inhibited by 3(3,4-dichlorophenyl)-1,1-dimethylurea”
e1“Arabidopsis thaliana (L.) Heynh.”
Claim · model-written summary
Chloramphenicol did not inhibit expression in light.
- Taxon
- Arabidopsis thaliana (L.) Heynh.Arabidopsis thalianae1
- Treatment
- chloramphenicole0
- Outcome
- sugar-inducible expressione0
- Direction
- not inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sugar-inducible expression in the light was not inhibited by 3(3,4-dichlorophenyl)-1,1-dimethylurea or by chloramphenicol”
e1“Arabidopsis thaliana (L.) Heynh.”
Claim · model-written summary
Cycloheximide inhibited expression in light.
- Taxon
- Arabidopsis thaliana (L.) Heynh.Arabidopsis thalianae1
- Treatment
- cycloheximidee0
- Outcome
- sugar-inducible expressione0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sugar-inducible expression in the light was not inhibited by 3(3,4-dichlorophenyl)-1,1-dimethylurea or by chloramphenicol, but it was inhibited by cycloheximide.”
e1“Arabidopsis thaliana (L.) Heynh.”
Claim · model-written summary
The authors infer a light signal and de novo cytoplasmic protein synthesis in regulation.
- Taxon
- Arabidopsis thaliana (L.) Heynh.Arabidopsis thalianae1
- Outcome
- regulatione0
- Qualifier
- de novo synthesis of proteins in the cytoplasme0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a light-induced signal and de novo synthesis of proteins in the cytoplasm are involved in the regulation.”
e1“Arabidopsis thaliana (L.) Heynh.”
Claim · model-written summary
A promoter reporter fusion showed sugar inducible, light dependent expression in transgenic leaves.
- Taxon
- ArabidopsisArabidopsise0
- Gene
- beta-amylasee0
- Outcome
- sugar-inducible expressione0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A fusion gene composed of the 5' upstream region of the gene for beta-amylase from Arabidopsis and the coding sequence of beta-glucuronidase showed the sugar-inducible expression in a light-dependent manner in rosette leaves of transgenic Arabidopsis.”
e1“transgenic Arabidopsis”
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See all 80 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.