Abstract
The pith parenchyma in tomato ( Lycopersicum esculentum ) stems was found to be disrupted in response to water stress (stem pithiness). The process of the degradation starts at the upper part of the stem and proceeds downwards as the stress is prolonged. The damage to the stem tissue was found to be irreversible upon rehydration of the stressed plants. Scanning electron microscopy revealed that the protoplast of the affected cells is disrupted first, followed by degradation of the cell wall. Application of abscisic acid (ABA) induced pithiness in non‐stressed plants and also enhanced the effect of a short period of dehydration. Kinetin, although causing severe wilting, did not induce pithiness. However, when given after a short period of water stress or within the period of stress, kinetin enhanced pithiness development. In the course of the stress, ABA levels in the upper part of the stem and in the young leaves were higher than the levels found in the lower parts of the plant shoot. The increase in ABA levels was detected before any sign of pithiness. It is suggested that ABA might be the triggering agent of the cellular degradation process initiated by water stress.
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Claims 12
Claim · model-written summary
Water stress disrupted tomato stem pith parenchyma.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- water stresse0
- Outcome
- pith parenchymae0
- Direction
- disruptede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The pith parenchyma in tomato ( Lycopersicum esculentum ) stems was found to be disrupted in response to water stress (stem pithiness).”
Claim · model-written summary
Pith degradation starts in the upper stem and proceeds downward as stress persists.
- Taxon
- tomatoSolanum lycopersicume1
- Organ / stage
- steme0
- Outcome
- degradation starts at the upper part of the stem and proceeds downwardse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The process of the degradation starts at the upper part of the stem and proceeds downwards as the stress is prolonged.”
e1“tomato”
Claim · model-written summary
Rehydration did not reverse stressed tomato stem tissue damage.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- rehydratione0
- Outcome
- damage to the stem tissuee0
- Direction
- irreversiblee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The damage to the stem tissue was found to be irreversible upon rehydration of the stressed plants.”
e1“tomato”
Claim · model-written summary
Affected cells lost protoplast integrity before cell wall degradation.
- Taxon
- tomatoSolanum lycopersicume1
- Outcome
- protoplast of the affected cells is disrupted first, followed by degradation of the cell walle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the protoplast of the affected cells is disrupted first, followed by degradation of the cell wall.”
e1“tomato”
Claim · model-written summary
ABA application induced pithiness in unstressed tomato plants.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- abscisic acid (ABA)e0
- Outcome
- pithinesse0
- Direction
- inducede0
- Comparator
- non‐stressed plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of abscisic acid (ABA) induced pithiness in non‐stressed plants”
e1“tomato”
Claim · model-written summary
ABA enhanced pithiness following a short dehydration period.
- Taxon
- tomatoSolanum lycopersicume2
- Treatment
- abscisic acid (ABA)e1
- Outcome
- effect of a short period of dehydratione0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“also enhanced the effect of a short period of dehydration.”
e1“Application of abscisic acid (ABA) induced pithiness in non‐stressed plants”
e2“tomato”
Claim · model-written summary
Kinetin caused severe wilting.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- Kinetine0
- Outcome
- severe wiltinge0
- Direction
- causinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Kinetin, although causing severe wilting, did not induce pithiness.”
e1“tomato”
Claim · model-written summary
Kinetin did not induce pithiness by itself.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- Kinetine0
- Outcome
- pithinesse0
- Direction
- did not inducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Kinetin, although causing severe wilting, did not induce pithiness.”
e1“tomato”
Claim · model-written summary
Kinetin enhanced pithiness when given after or during short water stress.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- kinetine0
- Outcome
- pithiness developmente0
- Direction
- enhancede0
- Qualifier
- after a short period of water stress or within the period of stresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when given after a short period of water stress or within the period of stress, kinetin enhanced pithiness development.”
e1“tomato”
Claim · model-written summary
Under stress, ABA levels were higher in upper stems and young leaves than in lower shoot parts.
- Taxon
- tomatoSolanum lycopersicume1
- Organ / stage
- upper part of the stem and in the young leavese0
- Outcome
- ABA levelse0
- Direction
- highere0
- Comparator
- lower parts of the plant shoote0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ABA levels in the upper part of the stem and in the young leaves were higher than the levels found in the lower parts of the plant shoot.”
e1“tomato”
Claim · model-written summary
ABA levels rose before pithiness appeared.
- Taxon
- tomatoSolanum lycopersicume1
- Outcome
- ABA levelse0
- Direction
- increasee0
- Qualifier
- before any sign of pithinesse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase in ABA levels was detected before any sign of pithiness.”
e1“tomato”
Claim · model-written summary
The authors suggest ABA may trigger cellular degradation initiated by water stress.
- Taxon
- tomatoSolanum lycopersicume1
- Compound
- ABAe0
- Outcome
- cellular degradation process initiated by water stresse0
- Qualifier
- might be the triggering agente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It is suggested that ABA might be the triggering agent of the cellular degradation process initiated by water stress.”
e1“tomato”
The same questions in other papers
kinetin · disease · Solanum lycopersicum (tomato)Positive and negative results
1 in the opposite direction
- positive
kinetin · growth · Solanum lycopersicum (tomato)Positive and negative results
1 paper in the same direction as this paper · 22 in the opposite direction
- positive
- positive
- positive
20 papers more in this group
See all 24 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.