Abstract
Abstract Variations were investigated in matric potential (Ψ ms ) and temperature in the root environment of tomato plants ( Lycopersicon esculentum Mill. ‘Red Dwarf) grown over a range (200, 400, or 800 cm 3 ) of rooting volumes (RV). Under media‐based growing conditions, ? ms and temperature varied inversely with RV. The root environment in the smallest RV had a 2‐fold decrease in Ψ ms to ‐14 kPa, a greater rate of decrease in Ψ ms and a lower overall Ψ ms magnitude of‐30 kPa (compared with‐12 kPa in the largest RV). There were large diurnal temperature fluctuations (range = 12°C) and the root environment in the smallest RV was consistently 3°C higher with a mean of 25.4°C, compared with a mean of 22.3°C in the largest RV. Enclosing the pots within a modified hydroponic system, in conjunction with a very frequent watering regime, eliminated differences in Ψ ms and reduced differences in media temperature between different RVs. The physiological basis of the dwarfing response previously associated with RVR may have been inadvertently confounded with variations in media Ψ ms and media temperature.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 8
Claim · model-written summary
Media matric potential and temperature varied inversely with rooting volume.
- Taxon
- tomato plants ( Lycopersicon esculentum Mill. ‘Red Dwarf)
Solanum lycopersicume0 - Treatment
- RVe1
- Outcome
- ? ms and temperaturee1
- Direction
- inverselye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tomato plants ( Lycopersicon esculentum Mill. ‘Red Dwarf)”
e1“Under media‐based growing conditions, ? ms and temperature varied inversely with RV.”
Claim · model-written summary
The smallest rooting volume showed a twofold fall in root-zone matric potential to −14 kPa.
- Taxon
- tomato plants ( Lycopersicon esculentum Mill. ‘Red Dwarf)Solanum lycopersicume0
- Treatment
- smallest RVe1
- Outcome
- Ψ mse1
- Direction
- decreasee1
- Value
- 2‐folde1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tomato plants ( Lycopersicon esculentum Mill. ‘Red Dwarf)”
e1“The root environment in the smallest RV had a 2‐fold decrease in Ψ ms to ‐14 kPa, a greater rate of decrease in Ψ ms and a lower overall Ψ ms magnitude of‐30 kPa (compared with‐12 kPa in the largest RV).”
Claim · model-written summary
The smallest rooting volume had lower overall matric potential than the largest volume.
- Taxon
- tomato plants ( Lycopersicon esculentum Mill. ‘Red Dwarf)Solanum lycopersicume0
- Outcome
- Ψ mse1
- Direction
- lowere1
- Value
- ‐30 kPae1
- Qualifier
- compared with‐12 kPae1
- Comparator
- largest RVe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tomato plants ( Lycopersicon esculentum Mill. ‘Red Dwarf)”
e1“The root environment in the smallest RV had a 2‐fold decrease in Ψ ms to ‐14 kPa, a greater rate of decrease in Ψ ms and a lower overall Ψ ms magnitude of‐30 kPa (compared with‐12 kPa in the largest RV).”
Claim · model-written summary
The smallest volume had a greater rate of matric-potential decrease.
- Taxon
- tomato plants ( Lycopersicon esculentum Mill. ‘Red Dwarf)Solanum lycopersicume0
- Treatment
- smallest RVe1
- Outcome
- rate of decrease in Ψ mse1
- Direction
- greatere1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tomato plants ( Lycopersicon esculentum Mill. ‘Red Dwarf)”
e1“The root environment in the smallest RV had a 2‐fold decrease in Ψ ms to ‐14 kPa, a greater rate of decrease in Ψ ms and a lower overall Ψ ms magnitude of‐30 kPa (compared with‐12 kPa in the largest RV).”
Claim · model-written summary
The root environment had large daily temperature fluctuations of 12°C.
- Taxon
- tomato plants ( Lycopersicon esculentum Mill. ‘Red Dwarf)Solanum lycopersicume0
- Outcome
- diurnal temperature fluctuationse1
- Value
- 12°Ce1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tomato plants ( Lycopersicon esculentum Mill. ‘Red Dwarf)”
e1“There were large diurnal temperature fluctuations (range = 12°C) and the root environment in the smallest RV was consistently 3°C higher with a mean of 25.4°C, compared with a mean of 22.3°C in the largest RV.”
Claim · model-written summary
The smallest volume was 3°C warmer than the largest volume.
- Taxon
- tomato plants ( Lycopersicon esculentum Mill. ‘Red Dwarf)Solanum lycopersicume0
- Treatment
- smallest RVe1
- Outcome
- root environmente1
- Direction
- highere1
- Value
- 3°Ce1
- Qualifier
- mean of 25.4°C, compared with a mean of 22.3°Ce1
- Comparator
- largest RVe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tomato plants ( Lycopersicon esculentum Mill. ‘Red Dwarf)”
e1“There were large diurnal temperature fluctuations (range = 12°C) and the root environment in the smallest RV was consistently 3°C higher with a mean of 25.4°C, compared with a mean of 22.3°C in the largest RV.”
Claim · model-written summary
Modified hydroponics with frequent watering eliminated matric-potential differences among rooting volumes.
- Taxon
- tomato plants ( Lycopersicon esculentum Mill. ‘Red Dwarf)Solanum lycopersicume0
- Treatment
- modified hydroponic system, in conjunction with a very frequent watering regimee1
- Outcome
- differences in Ψ mse1
- Direction
- eliminatede1
- Comparator
- different RVse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tomato plants ( Lycopersicon esculentum Mill. ‘Red Dwarf)”
e1“Enclosing the pots within a modified hydroponic system, in conjunction with a very frequent watering regime, eliminated differences in Ψ ms and reduced differences in media temperature between different RVs.”
Claim · model-written summary
Modified hydroponics with frequent watering reduced media temperature differences among rooting volumes.
- Taxon
- tomato plants ( Lycopersicon esculentum Mill. ‘Red Dwarf)Solanum lycopersicume0
- Treatment
- modified hydroponic system, in conjunction with a very frequent watering regimee1
- Outcome
- differences in media temperaturee1
- Direction
- reducede1
- Comparator
- different RVse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tomato plants ( Lycopersicon esculentum Mill. ‘Red Dwarf)”
e1“Enclosing the pots within a modified hydroponic system, in conjunction with a very frequent watering regime, eliminated differences in Ψ ms and reduced differences in media temperature between different RVs.”
The same questions in other papers
cultivation system · soil: physics · Solanum lycopersicum (tomato)Positive and negative results
4 papers in the same direction as this paper · 2 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- no effect
- no effect
4 papers more in this group
See all 8 papers →irrigation · soil: physics · Solanum lycopersicum (tomato)Positive and negative results
12 papers in the same direction as this paper · 5 in the opposite direction
- negative
- no effect
- negative
14 papers more in this group
See all 18 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.