Abstract
Tomato ( Solanum lycopersicum L.) is a warm-season, cold-sensitive crop that shows slower growth and development at temperatures below 18 °C. Improving suboptimal temperature tolerance would allow earlier planting of field-grown tomato and a reduction in energy inputs for heating greenhouses. Grafting tomato onto high-altitude Solanum habrochaites (S. Knapp and D.M. Spooner) accessions has proven effective at improving scion suboptimal temperature tolerance in limited experiments. This study was conducted to determine whether commercially available tomato rootstocks with differing parental backgrounds and root system morphologies can improve the tolerance of scion plants to suboptimal temperature. Two controlled environment growth chambers were used and maintained at either optimal (25 °C day/20 °C night) or suboptimal (15 °C day/15 °C night) temperatures. The cold-sensitive tomato cultivar Moneymaker was used as the nongrafted and self-grafted control as well as scion grafted on ‘Multifort’ ( S. lycopersicum × S. habrochaites ), ‘Shield’ ( S. lycopersicum ), and S. habrochaites LA1777 rootstocks. Plants were grown for 10 days in 3.8 L plastic containers filled with a mixture of calcined clay and sand. ‘Multifort’ rootstock significantly reduced the amount of cold-induced stress as observed by larger leaf area and higher levels of CO 2 assimilation and photosystem II quantum efficiency. ‘Multifort’ had significantly longer roots, having 42% to 56% more fine root (diameter less than 0.5 mm) length compared with the other nongrafted and grafted treatments. Leaf starch concentration was significantly lower in ‘Multifort’-grafted plants at suboptimal temperatures compared with the self-grafted and nongrafted controls and the ‘Shield’-grafted plants at the same temperature. The ability for ‘Multifort’ to maintain root growth at suboptimal temperatures may improve root system sink strength, thereby promoting movement of photosynthate from leaf to root even under cold conditions. This work demonstrates that a commercially available rootstock can be used to improve suboptimal temperature tolerance in cold-sensitive ‘Moneymaker’ scions.
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Claims 7
Claim · model-written summary
Multifort-grafted tomato had larger leaf area under cold conditions.
- Taxon
- Tomato
Solanum lycopersicumt0 - Material
- ‘Multifort’e0
- Treatment
- ‘Multifort’ rootstocke0
- Outcome
- leaf areae0
- Direction
- largere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“‘Multifort’ rootstock significantly reduced the amount of cold-induced stress as observed by larger leaf area”
t0“Tomato”
Claim · model-written summary
Multifort-grafted tomato had higher CO2 assimilation and photosystem II quantum efficiency under cold conditions.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- ‘Multifort’ rootstocke0
- Outcome
- CO 2 assimilation and photosystem II quantum efficiencye0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“‘Multifort’ rootstock significantly reduced the amount of cold-induced stress as observed by larger leaf area and higher levels of CO 2 assimilation and photosystem II quantum efficiency”
t0“Tomato”
Claim · model-written summary
Multifort had significantly longer roots than other grafting treatments.
- Taxon
- TomatoSolanum lycopersicumt0
- Organ / stage
- rootse0
- Treatment
- ‘Multifort’e0
- Outcome
- rootse0
- Direction
- longere0
- Comparator
- other nongrafted and grafted treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“‘Multifort’ had significantly longer roots, having 42% to 56% more fine root (diameter less than 0.5 mm) length compared with the other nongrafted and grafted treatments”
t0“Tomato”
Claim · model-written summary
Multifort had 42% to 56% more fine-root length than other nongrafted and grafted treatments.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- ‘Multifort’e0
- Outcome
- fine root (diameter less than 0.5 mm) lengthe0
- Direction
- moree0
- Value
- 42% to 56%e0
- Comparator
- other nongrafted and grafted treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“‘Multifort’ had significantly longer roots, having 42% to 56% more fine root (diameter less than 0.5 mm) length compared with the other nongrafted and grafted treatments”
t0“Tomato”
Claim · model-written summary
At suboptimal temperature Multifort-grafted plants had lower leaf starch than self-grafted, nongrafted, or Shield-grafted plants.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- ‘Multifort’-grafted plantse0
- Outcome
- Leaf starch concentratione0
- Direction
- lowere0
- Qualifier
- at suboptimal temperaturese0
- Comparator
- self-grafted and nongrafted controls and the ‘Shield’-grafted plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf starch concentration was significantly lower in ‘Multifort’-grafted plants at suboptimal temperatures compared with the self-grafted and nongrafted controls and the ‘Shield’-grafted plants at the same temperature”
t0“Tomato”
Claim · model-written summary
Maintained root growth was proposed to increase root sink strength and leaf-to-root photosynthate movement under cold conditions.
- Taxon
- TomatoSolanum lycopersicumt0
- Organ / stage
- roote0
- Outcome
- movement of photosynthate from leaf to roote0
- Qualifier
- may improve root system sink strengthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maintain root growth at suboptimal temperatures may improve root system sink strength, thereby promoting movement of photosynthate from leaf to root even under cold conditions”
t0“Tomato”
Claim · model-written summary
The authors concluded that a commercial rootstock can improve Moneymaker cold tolerance.
- Taxon
- TomatoSolanum lycopersicumt0
- Material
- ‘Moneymaker’e0
- Treatment
- commercially available rootstocke0
- Outcome
- improve suboptimal temperature tolerancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a commercially available rootstock can be used to improve suboptimal temperature tolerance in cold-sensitive ‘Moneymaker’ scions”
t0“Tomato”
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71 papers in the same direction as this paper · 11 in the opposite direction
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See all 83 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.