Abstract
Summary 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 7
Claim · model-written summary
tap was expressed in green but not red fruit exocarp.
- Taxon
- tomato
Solanum lycopersicume0 - Organ / stage
- exocarp of green, but not red, tomato fruitse0
- Gene
- tap genee0
- Outcome
- expression of the tap genee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“developmentally regulated expression of the tap gene in the exocarp of green, but not red, tomato fruits.”
Claim · model-written summary
Detaching green fruits eliminated tap transcript within 72 h.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Detaching green fruits from the vinee0
- 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 transcripts in detached green fruits at levels comparable with attached fruit.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- cytokinine0
- Outcome
- level of tap transcriptse0
- Direction
- comparablee0
- 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 in green fruit.
- Taxon
- tomatoSolanum lycopersicumt0
- Organ / stage
- healing periderm of green fruitse0
- Gene
- tape0
- Outcome
- expression of tape0
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”
t0“tomato”
Claim · model-written summary
Wound-induced tap expression was undetectable in ripening fruit wound tissue.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- wound‐tissue of post‐climacteric ripening fruitse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but was not detectable in the wound‐tissue of post‐climacteric ripening fruits.”
t0“tomato”
Claim · model-written summary
Ethephon did not affect developmental tap suppression in post-climacteric fruits.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- ethylenee0
- 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“ethylene does not effect the developmental suppression of tap in post‐climacteric fruits”
t0“tomato”
Claim · model-written summary
Ethephon did not alter tap transcript levels in healthy or wound-healing tissue.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- 2‐chloro‐ethylphosphonic acid (ethephon)t1
- 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“nor does it alter the normal levels of tap transcripts in either healthy or wound‐healing tomato tissues.”
t1“2‐chloro‐ethylphosphonic acid (ethephon)”
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.