Abstract
Tomato (Lycopersicon esculentum) plants were grown in liquid culture inside the greenhouse of Hiroshima University, Japan. At the first fruiting stage, P was withdrawn from the rooting medium for a period of 19 d and its effect was studied on photosynthesis, stomatal conductance, transpiration, partitioning of 13C and 15N, P contents of various organs, and changes in stem and fruit diameter of the plant in order to identify the mechanism of resource management on the part of the plant at low P. Compared to the control, P-deficiency treatment decreased biomass growth of all organs except the roots. The treatment also depressed leaf photosynthesis, stomatal conductance and diameter of fruit and stem after a lag period of about 1 week. The stem diameter of the plant shrank during daytime and expanded during the night; the adverse effect of P-deficiency on stem diameter change was more evident during the night than the day. The circadian rhythm in fluctuations of diameter was less manifested in the fruit compared with the stem. P-deficiency induced daytime shrinkage and reduced night expansion of fruit. However, within the plant, P-deficiency encouraged partitioning of 13C, 15N and P into the fruit at the cost of autotrophic organs such as leaves and the upper parts of the stem. The results were discussed in the light of a plausible effect of P-deficiency on water relations of the plant. It is concluded that, in spite of the preference in partitioning of C and N received within the plant parts, assimilate flow into the fruit is limited at low-P compared with the control, owing to the restriction in fruit expansion.
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Claims 10
Claim · model-written summary
P deficiency decreased biomass growth of organs except roots.
- Taxon
- Tomato
Solanum lycopersicumt0 - Treatment
- P-deficiency treatmente0
- Outcome
- biomass growth of all organs except the rootse0
- Direction
- decreasede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to the control, P-deficiency treatment decreased biomass growth of all organs except the roots.”
t0“Tomato”
Claim · model-written summary
P deficiency depressed leaf photosynthesis and stomatal conductance after about one week.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- P-deficiencyt1
- Outcome
- leaf photosynthesis, stomatal conductancee0
- Direction
- depressede0
- Qualifier
- after a lag period of about 1 weeke0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The treatment also depressed leaf photosynthesis, stomatal conductance and diameter of fruit and stem after a lag period of about 1 week.”
t0“Tomato”
t1“P-deficiency”
Claim · model-written summary
P deficiency depressed fruit and stem diameter after about one week.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- P-deficiencyt1
- Outcome
- diameter of fruit and steme0
- Direction
- depressede0
- Qualifier
- after a lag period of about 1 weeke0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The treatment also depressed leaf photosynthesis, stomatal conductance and diameter of fruit and stem after a lag period of about 1 week.”
t0“Tomato”
t1“P-deficiency”
Claim · model-written summary
Stem diameter shrank during daytime and expanded at night.
- Taxon
- TomatoSolanum lycopersicumt0
- Outcome
- stem diametere0
- Direction
- shrank during daytime and expanded during the nighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The stem diameter of the plant shrank during daytime and expanded during the night”
t0“Tomato”
Claim · model-written summary
The adverse effect of P deficiency on stem diameter change was more evident at night.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- P-deficiencye0
- Outcome
- stem diameter changee0
- Direction
- more evidente0
- Qualifier
- during the nighte0
- Comparator
- the daye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the adverse effect of P-deficiency on stem diameter change was more evident during the night than the day.”
t0“Tomato”
Claim · model-written summary
Circadian diameter fluctuations were less manifested in fruit than stem.
- Taxon
- TomatoSolanum lycopersicumt0
- Organ / stage
- fruite0
- Outcome
- circadian rhythm in fluctuations of diametere0
- Direction
- less manifestede0
- Comparator
- steme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The circadian rhythm in fluctuations of diameter was less manifested in the fruit compared with the stem.”
t0“Tomato”
Claim · model-written summary
P deficiency induced daytime fruit shrinkage.
- Taxon
- TomatoSolanum lycopersicumt0
- Organ / stage
- fruite0
- Treatment
- P-deficiencye0
- Outcome
- daytime shrinkagee0
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P-deficiency induced daytime shrinkage and reduced night expansion of fruit.”
t0“Tomato”
Claim · model-written summary
P deficiency reduced night expansion of fruit.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- P-deficiencye0
- Outcome
- night expansion of fruite0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P-deficiency induced daytime shrinkage and reduced night expansion of fruit.”
t0“Tomato”
Claim · model-written summary
P deficiency encouraged partitioning of 13C, 15N and P into fruit at the expense of autotrophic organs.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- P-deficiencye0
- Outcome
- partitioning of 13C, 15N and P into the fruite0
- Direction
- encouragede0
- Comparator
- autotrophic organs such as leaves and the upper parts of the steme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P-deficiency encouraged partitioning of 13C, 15N and P into the fruit at the cost of autotrophic organs such as leaves and the upper parts of the stem.”
t0“Tomato”
Claim · model-written summary
Assimilate flow into fruit was limited at low P relative to control because fruit expansion was restricted.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- low-Pe0
- Outcome
- assimilate flow into the fruite0
- Direction
- limitede0
- Qualifier
- restriction in fruit expansione0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“assimilate flow into the fruit is limited at low-P compared with the control, owing to the restriction in fruit expansion.”
t0“Tomato”
The same questions in other papers
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This paper is about lacking the nutrient, so it counts the other way round here.
- no effect
- negative
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63 papers in the same direction as this paper · 12 in the opposite direction
This paper is about lacking the nutrient, so it counts the other way round here.
- positive
- no effect
- negative
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See all 76 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.