Abstract
Lignin composition in leaf, fruit, and fruit outer epidermis of transgenic tomato (Lycopersicon esculentum Mill.) plants that overproduce the enzyme tobacco anionic peroxidase (TobAnPOD) was analyzed. This enzyme may catalyze the polymerization of cinnamyl alcohols into lignin in tobacco (Nicotiana tabacum L.); therefore, we predicted that its presence in the transformed tissue would increase lignin levels in healthy and wounded tissue. Lignin levels in healthy plants increased by 20% in leaf, 49% in fruit, and 106% in fruit outer epidermal tissue. Mature-green fruit were aseptically wounded and incubated in darkness for up to 7 days. Soluble phenols in wounded transgenic fruit increased by more than 300% hut changed little in control fruit. As with soluble phenols, lignin content in wounded transformed fruit increased by more than 20-fold hut increased less than two-fold in control fruit. Transgenic seedlings overproducing TobAnPOD were screened for susceptibility to several pathogens, but resistance did not increase. Possible TobAnPOD roles in lignin biosynthesis, phenol metabolism, stress response, and disease resistance are discussed.
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Claims 6
Claim · model-written summary
TobAnPOD overproduction increased lignin in healthy tomato leaf by 20%.
- Taxon
- tomato (Lycopersicon esculentum Mill.)
Solanum lycopersicume1 - Organ / stage
- leafe0
- Treatment
- transgenic tomatoe1
- Gene
- tobacco anionic peroxidase (TobAnPOD)e1
- Outcome
- Lignin levelse0
- Direction
- increasede0
- Value
- 20%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lignin levels in healthy plants increased by 20% in leaf, 49% in fruit, and 106% in fruit outer epidermal tissue.”
t0“Peroxidase Overproduction in Tomato: Wound-induced Polyphenol Deposition and Disease Resistance”
e1“Lignin composition in leaf, fruit, and fruit outer epidermis of transgenic tomato (Lycopersicon esculentum Mill.) plants that overproduce the enzyme tobacco anionic peroxidase (TobAnPOD) was analyzed.”
Claim · model-written summary
TobAnPOD overproduction increased lignin in healthy tomato fruit by 49%.
- Taxon
- tomato (Lycopersicon esculentum Mill.)Solanum lycopersicume1
- Organ / stage
- fruite0
- Treatment
- transgenic tomatoe1
- Gene
- tobacco anionic peroxidase (TobAnPOD)e1
- Outcome
- Lignin levelse0
- Direction
- increasede0
- Value
- 49%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lignin levels in healthy plants increased by 20% in leaf, 49% in fruit, and 106% in fruit outer epidermal tissue.”
t0“Peroxidase Overproduction in Tomato: Wound-induced Polyphenol Deposition and Disease Resistance”
e1“Lignin composition in leaf, fruit, and fruit outer epidermis of transgenic tomato (Lycopersicon esculentum Mill.) plants that overproduce the enzyme tobacco anionic peroxidase (TobAnPOD) was analyzed.”
Claim · model-written summary
TobAnPOD overproduction increased lignin in healthy tomato fruit outer epidermal tissue by 106%.
- Taxon
- tomato (Lycopersicon esculentum Mill.)Solanum lycopersicume1
- Organ / stage
- fruit outer epidermal tissuee0
- Treatment
- transgenic tomatoe1
- Gene
- tobacco anionic peroxidase (TobAnPOD)e1
- Outcome
- Lignin levelse0
- Direction
- increasede0
- Value
- 106%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lignin levels in healthy plants increased by 20% in leaf, 49% in fruit, and 106% in fruit outer epidermal tissue.”
t0“Peroxidase Overproduction in Tomato: Wound-induced Polyphenol Deposition and Disease Resistance”
e1“Lignin composition in leaf, fruit, and fruit outer epidermis of transgenic tomato (Lycopersicon esculentum Mill.) plants that overproduce the enzyme tobacco anionic peroxidase (TobAnPOD) was analyzed.”
Claim · model-written summary
Soluble phenols in wounded transgenic fruit increased by more than 300%.
- Taxon
- tomato (Lycopersicon esculentum Mill.)Solanum lycopersicume1
- Organ / stage
- fruite0
- Treatment
- wounded transgenic fruite0
- Outcome
- Soluble phenolse0
- Direction
- increasede0
- Value
- more than 300%e0
- Comparator
- control fruite0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soluble phenols in wounded transgenic fruit increased by more than 300% hut changed little in control fruit.”
t0“Peroxidase Overproduction in Tomato: Wound-induced Polyphenol Deposition and Disease Resistance”
e1“Lignin composition in leaf, fruit, and fruit outer epidermis of transgenic tomato (Lycopersicon esculentum Mill.) plants that overproduce the enzyme tobacco anionic peroxidase (TobAnPOD) was analyzed.”
Claim · model-written summary
Lignin in wounded transformed fruit increased more than 20 fold versus less than two fold in controls.
- Taxon
- tomato (Lycopersicon esculentum Mill.)Solanum lycopersicume1
- Treatment
- wounded transformed fruite0
- Outcome
- lignin contente0
- Direction
- increasede0
- Value
- more than 20-folde0
- Qualifier
- less than two-folde0
- Comparator
- control fruite0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“As with soluble phenols, lignin content in wounded transformed fruit increased by more than 20-fold hut increased less than two-fold in control fruit.”
t0“Peroxidase Overproduction in Tomato: Wound-induced Polyphenol Deposition and Disease Resistance”
e1“Lignin composition in leaf, fruit, and fruit outer epidermis of transgenic tomato (Lycopersicon esculentum Mill.) plants that overproduce the enzyme tobacco anionic peroxidase (TobAnPOD) was analyzed.”
Claim · model-written summary
TobAnPOD overproduction did not increase tomato seedling resistance to screened pathogens.
- Taxon
- tomato (Lycopersicon esculentum Mill.)Solanum lycopersicume1
- Organ / stage
- seedlingse0
- Treatment
- overproducing TobAnPODe0
- Outcome
- resistancee0
- Direction
- did not increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Transgenic seedlings overproducing TobAnPOD were screened for susceptibility to several pathogens, but resistance did not increase.”
t0“Peroxidase Overproduction in Tomato: Wound-induced Polyphenol Deposition and Disease Resistance”
e1“Lignin composition in leaf, fruit, and fruit outer epidermis of transgenic tomato (Lycopersicon esculentum Mill.) plants that overproduce the enzyme tobacco anionic peroxidase (TobAnPOD) was analyzed.”
The same questions in other papers
Nicotiana tabacum · disease · Solanum lycopersicum (tomato)Positive and negative results
2 papers in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- positive
2 papers more in this group
See all 6 papers →Peroxidase · disease · Solanum lycopersicum (tomato)Results agree
1 paper in the same direction as this paper
- negative
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.