Abstract
A highly anionic peroxidase (TAP) isolated from tomato was thought to be induced only upon wounding or fungal attack as this protein and its mRNA could not be detected in the vegetative tissues of healthy tomato but accumulated to very high levels in tissues responding to wounding or fungal attack. We now demonstrate a pattern of developmentally regulated expression of the tap gene in the exocarp of green, but not red, tomato fruits. Detaching green fruits from the vine, however, leads to the complete loss of the tap transcript within 72 h. Administration of various growth regulators through the pedicel of detached green fruits revealed that cytokinin was able to sustain a level of tap transcripts in 72 h detached fruits comparable with that found in fruits attached to the vine. Wound-induced expression of tap was confined to the healing periderm of green fruits but was not detectable in the wound-tissue of post-climacteric ripening fruits. These results suggest that the developmental and wound regulated expression of tap may occur by separate or overlapping signal transduction pathways. Treatment of tomato plants and green fruits with 2-chloro-ethylphosphonic acid (ethephon) demonstrated that ethylene does not effect the developmental suppression of tap in post-climacteric fruits, nor does it alter the normal levels of tap transcripts in either healthy or wound-healing tomato tissues.
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Claims 9
Claim · model-written summary
The tap gene was expressed in green fruit exocarp but not red fruit exocarp.
- Taxon
- tomato
Solanum lycopersicume0 - Organ / stage
- exocarp of greene0
- Gene
- tap genee0
- Outcome
- expression of the tap genee0
- Comparator
- rede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We now demonstrate a pattern of developmentally regulated expression of the tap gene in the exocarp of green, but not red, tomato fruits.”
Claim · model-written summary
Detaching green fruit led to complete loss of tap transcript within 72 hours.
- Taxon
- tomatoSolanum lycopersicumt0
- Organ / stage
- green fruitse0
- Treatment
- Detaching green fruits from the vinee0
- Gene
- tape0
- Outcome
- tap transcripte0
- Direction
- complete losse0
- Value
- 72 he0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Detaching green fruits from the vine, however, leads to the complete loss of the tap transcript within 72 h.”
t0“tomato”
Claim · model-written summary
Cytokinin sustained tap transcript in detached fruit at levels comparable with attached fruit.
- Taxon
- tomatoSolanum lycopersicumt0
- Organ / stage
- detached fruitse0
- Treatment
- cytokinine0
- Gene
- tape0
- Outcome
- tap transcriptse0
- Direction
- sustaine0
- Qualifier
- 72 he0
- Comparator
- fruits attached to the vinee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cytokinin was able to sustain a level of tap transcripts in 72 h detached fruits comparable with that found in fruits attached to the vine.”
t0“tomato”
Claim · model-written summary
Wound-induced tap expression was confined to healing periderm of green fruit.
- Taxon
- tomatoSolanum lycopersicumt0
- Organ / stage
- healing periderm of green fruitse0
- Gene
- tape0
- Outcome
- Wound-induced expression of tape0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wound-induced expression of tap was confined to the healing periderm of green fruits but was not detectable in the wound-tissue of post-climacteric ripening fruits.”
t0“tomato”
Claim · model-written summary
Wound-induced tap expression was undetectable in post-climacteric ripening fruit wound tissue.
- Taxon
- tomatoSolanum lycopersicumt0
- Organ / stage
- wound-tissue of post-climacteric ripening fruitse0
- Gene
- tape0
- Outcome
- not detectablee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wound-induced expression of tap was confined to the healing periderm of green fruits but was not detectable in the wound-tissue of post-climacteric ripening fruits.”
t0“tomato”
Claim · model-written summary
The authors suggest that developmental and wound regulation of tap may use separate or overlapping signal pathways.
- Taxon
- tomatoSolanum lycopersicumt0
- Gene
- tape0
- Outcome
- expression of tape0
- Qualifier
- separate or overlapping signal transduction pathwayse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These results suggest that the developmental and wound regulated expression of tap may occur by separate or overlapping signal transduction pathways.”
t0“tomato”
Claim · model-written summary
Ethephon did not cause developmental suppression of tap in post-climacteric fruit.
- Taxon
- tomatoSolanum lycopersicume0
- Organ / stage
- post-climacteric fruitse0
- Treatment
- 2-chloro-ethylphosphonic acid (ethephon)e0
- Gene
- tape0
- Outcome
- developmental suppression of tape0
- Direction
- does not effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatment of tomato plants and green fruits with 2-chloro-ethylphosphonic acid (ethephon) demonstrated that ethylene does not effect the developmental suppression of tap in post-climacteric fruits, nor does it alter the normal levels of tap transcripts in either healthy or wound-healing tomato tissues.”
Claim · model-written summary
Ethephon did not alter tap transcript levels in healthy tomato tissue.
- Taxon
- tomatoSolanum lycopersicume0
- Organ / stage
- healthye0
- Treatment
- 2-chloro-ethylphosphonic acid (ethephon)e0
- Gene
- tape0
- Outcome
- normal levels of tap transcriptse0
- Direction
- nor does it altere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatment of tomato plants and green fruits with 2-chloro-ethylphosphonic acid (ethephon) demonstrated that ethylene does not effect the developmental suppression of tap in post-climacteric fruits, nor does it alter the normal levels of tap transcripts in either healthy or wound-healing tomato tissues.”
Claim · model-written summary
Ethephon did not alter tap transcript levels in wound-healing tomato tissue.
- Taxon
- tomatoSolanum lycopersicume0
- Organ / stage
- wound-healing tomato tissuese0
- Treatment
- 2-chloro-ethylphosphonic acid (ethephon)e0
- Gene
- tape0
- Outcome
- normal levels of tap transcriptse0
- Direction
- nor does it altere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatment of tomato plants and green fruits with 2-chloro-ethylphosphonic acid (ethephon) demonstrated that ethylene does not effect the developmental suppression of tap in post-climacteric fruits, nor does it alter the normal levels of tap transcripts in either healthy or wound-healing tomato tissues.”
The same questions in other papers
(2-chloroethyl)phosphonic acid · molecular: expression · Solanum lycopersicum (tomato)Positive and negative results
2 papers in the same direction as this paper · 4 in the opposite direction
- positive
- positive
- positive
3 papers more in this group
See all 7 papers →class · molecular: expression · Solanum lycopersicum (tomato)Positive and negative results
17 papers in the same direction as this paper · 7 in the opposite direction
- no effect
- no effect
- no effect
21 papers more in this group
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.