Abstract
Summary Activities of promoters from the capsanthin/capsorubin synthase and fibrillin genes, which are molecular markers for ripening in the non‐climacteric pepper fruits, have been studied in transgenic tomato plants that produce fruits of the climacteric type (characterized by an increase in respiration and ethylene production). The promoters of both genes were strongly upregulated during tomato fruit ripening in a manner similar to the induction of these genes in pepper fruits. Induction occurred at the mature green stage preceding ripening (a stage when ethylene production and respiration are known to rise in tomato fruits). Ethylene positively influenced the expression of both genes in tomato. Other plant growth regulators, namely abscisic acid, auxin and polyamines, did not alter gene expression. In contrast, water loss strongly induced both promoters. This dehydration‐mediated gene induction was inhibited by mitochondrial respiration inhibitors (mainly of the alternative oxidase). A slight positive effect with light, apparently not linked to normal photosynthesis but rather to photooxidative stress, was also observed. Taken together, the data indicate that activation of oxidase systems, leading to changes in the cellular redox balance, mediates the induction of both genes in tomato. Various cellular compartments are likely to be contributors to this process, which leads to the developmental regulation of nuclear genes encoding plastid‐located proteins.
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Claims 8
Claim · model-written summary
Promoters of the capsanthin/capsorubin synthase and fibrillin genes were strongly upregulated during tomato fruit ripening.
- Taxon
- tomato
Solanum lycopersicume1 - Organ / stage
- fruit ripeninge1
- Gene
- capsanthin/capsorubin synthase and fibrilline0
- Outcome
- promoters of both genese1
- Direction
- strongly upregulatede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“promoters from the capsanthin/capsorubin synthase and fibrillin genes”
e1“The promoters of both genes were strongly upregulated during tomato fruit ripening”
Claim · model-written summary
Promoter induction in tomato occurred at the mature green stage, before ripening.
- Taxon
- tomatoSolanum lycopersicume1
- Organ / stage
- mature green stagee2
- Outcome
- Inductione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The promoters of both genes were strongly upregulated during tomato fruit ripening”
e2“Induction occurred at the mature green stage preceding ripening”
Claim · model-written summary
Ethylene positively influenced the expression of both promoter genes in tomato.
- Taxon
- tomatoSolanum lycopersicume3
- Treatment
- Ethylenee3
- Outcome
- expression of both genese3
- Direction
- positively influencede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Ethylene positively influenced the expression of both genes in tomato”
Claim · model-written summary
Abscisic acid, auxin and polyamines did not alter promoter gene expression in tomato.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- abscisic acid, auxin and polyaminese4
- Outcome
- gene expressione4
- Direction
- did not altere4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The promoters of both genes were strongly upregulated during tomato fruit ripening”
e4“Other plant growth regulators, namely abscisic acid, auxin and polyamines, did not alter gene expression”
Claim · model-written summary
Water loss strongly induced both promoters in tomato.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- water losse5
- Outcome
- both promoterse5
- Direction
- strongly inducede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The promoters of both genes were strongly upregulated during tomato fruit ripening”
e5“In contrast, water loss strongly induced both promoters”
Claim · model-written summary
Mitochondrial respiration inhibitors inhibited dehydration-mediated promoter induction in tomato, mainly alternative oxidase inhibitors.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- mitochondrial respiration inhibitorse6
- Outcome
- gene inductione6
- Direction
- was inhibitede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The promoters of both genes were strongly upregulated during tomato fruit ripening”
e6“gene induction was inhibited by mitochondrial respiration inhibitors (mainly of the alternative oxidase)”
Claim · model-written summary
Light had a slight positive effect on promoter activity in tomato.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- lighte7
- Outcome
- slight positive effecte7
- Direction
- slight positive effecte7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The promoters of both genes were strongly upregulated during tomato fruit ripening”
e7“A slight positive effect with light, apparently not linked to normal photosynthesis but rather to photooxidative stress, was also observed”
Claim · model-written summary
Activation of oxidase systems that changes the cellular redox balance is likely to mediate promoter induction in tomato.
- Taxon
- tomatoSolanum lycopersicume1
- Outcome
- induction of both genese1
- Qualifier
- activation of oxidase systemse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the data indicate that activation of oxidase systems, leading to changes in the cellular redox balance, mediates the induction of both genes in tomato”
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See all 25 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.