Abstract
To determine the thermosensitive periods and physiological processes in tomato flowers exposed to moderately elevated temperatures, tomato plants (Lycopersicon esculentum Mill., cv. NC 8288) were grown at 28/22 degrees C or 32/26 degrees C day/night temperature regimes and then transferred to the opposite regime for 0-15 d before or 0-24 h after anthesis. For plants initially grown at 28/22 degrees C, moderate temperature stress before anthesis decreased the percentage of fruit set per plant, but did not clarify the thermosensitive period. The same level of stress did not significantly reduce fruit set when applied immediately after anthesis. For plants initially grown at 32/26 degrees C, fruit set was completely prevented unless a relief period of more than 5 d was provided before anthesis. The same level of stress relief for 3-24 h after anthesis also increased fruit set. Plants were most sensitive to 32/26 degrees C temperatures 7-15 d before anthesis. Microscopic investigation of anthers in plants grown continuously at high temperature indicated disruption of development in the pollen, endothecium, epidermis, and stomium. This disruption was reduced, but still observable in plants relieved from high temperature for 10 d before anthesis.
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Claims 7
Claim · model-written summary
Pre-anthesis moderate heat decreased fruit set per plant.
- Taxon
- Lycopersicon esculentum Mill.
Solanum lycopersicumt0 - Treatment
- moderate temperature stress before anthesise0
- Outcome
- percentage of fruit set per plante0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“moderate temperature stress before anthesis decreased the percentage of fruit set per plant”
t0“Lycopersicon esculentum Mill.”
Claim · model-written summary
Heat immediately after anthesis did not significantly reduce fruit set.
- Taxon
- Lycopersicon esculentum Mill.Solanum lycopersicumt0
- Treatment
- stresse0
- Outcome
- fruit sete0
- Direction
- did not significantly reducee0
- Qualifier
- immediately after anthesise0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The same level of stress did not significantly reduce fruit set when applied immediately after anthesis”
t0“Lycopersicon esculentum Mill.”
Claim · model-written summary
In plants initially grown at 32/26 degrees C, fruit set was prevented without more than five days of pre-anthesis relief.
- Taxon
- Lycopersicon esculentum Mill.Solanum lycopersicumt0
- Treatment
- 32/26 degrees Ce0
- Outcome
- fruit sete0
- Direction
- completely preventede0
- Qualifier
- unless a relief period of more than 5 d was provided before anthesise0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For plants initially grown at 32/26 degrees C, fruit set was completely prevented unless a relief period of more than 5 d was provided before anthesis”
t0“Lycopersicon esculentum Mill.”
Claim · model-written summary
Heat relief for 3-24 hours after anthesis increased fruit set.
- Taxon
- Lycopersicon esculentum Mill.Solanum lycopersicumt0
- Treatment
- stress relief for 3-24 h after anthesise0
- Outcome
- fruit sete0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“stress relief for 3-24 h after anthesis also increased fruit set”
t0“Lycopersicon esculentum Mill.”
Claim · model-written summary
Plants were most sensitive to 32/26 degrees C seven to fifteen days before anthesis.
- Taxon
- Lycopersicon esculentum Mill.Solanum lycopersicumt0
- Outcome
- sensitivee0
- Direction
- most sensitivee0
- Qualifier
- 7-15 d before anthesise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants were most sensitive to 32/26 degrees C temperatures 7-15 d before anthesis”
t0“Lycopersicon esculentum Mill.”
Claim · model-written summary
Continuous high temperature disrupted pollen, endothecium, epidermis and stomium development.
- Taxon
- Lycopersicon esculentum Mill.Solanum lycopersicumt0
- Treatment
- high temperaturee0
- Outcome
- development in the pollen, endothecium, epidermis, and stomiume0
- Direction
- disruptione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants grown continuously at high temperature indicated disruption of development in the pollen, endothecium, epidermis, and stomium”
t0“Lycopersicon esculentum Mill.”
Claim · model-written summary
Ten days of pre-anthesis relief reduced but did not eliminate anther developmental disruption.
- Taxon
- Lycopersicon esculentum Mill.Solanum lycopersicumt0
- Treatment
- relieved from high temperature for 10 d before anthesise0
- Outcome
- disruptione0
- Direction
- reducede0
- Qualifier
- still observablee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This disruption was reduced, but still observable in plants relieved from high temperature for 10 d before anthesis”
t0“Lycopersicon esculentum Mill.”
The same questions in other papers
heat · growth · Solanum lycopersicum (tomato)Results differ
54 papers in the same direction as this paper · 26 in the opposite direction
- negative
- no effect
- negative
77 papers more in this group
See all 81 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.