Abstract
SummaryTo analyze the dynamics of growth, water and nutrient uptake, the effects of 1, 3 and 7 d of calcium starvation and the recovery capability during 7 d afterwards were investigated in vegetative tomato plants. Results showed that after only 1.d of Ca-starvation, leaf photosynthesis, leaf expansion and leaf transpiration were already reduced and root growth had stopped completely. Leaf Ca concentration was reduced by a Ca-starvation with the strongest effect in the youngest leaves. When 1 d Ca-starvation period was followed by 7 d of recovery with full-strength nutrient solution, leaf photosynthesis and growth completely recovered. During the recovery period, Ca concentrations in the young leaves increased to higher values than these concentrations in the control plants. During the recovery period calcium uptake showed positive linear relationships with dry-matter increase of the plant as well as with water uptake. Most of the measured growth parameters showed a strong correlation with the plant Ca concentration, but the relations were not always identical during starvation and recovery. We discuss the role different forms and functions of Ca may play in regulating growth and developmental processes.
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Claims 7
Claim · model-written summary
Calcium starvation for 1 d reduced leaf photosynthesis, leaf expansion and leaf transpiration in tomato.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- Ca-starvatione1
- Outcome
- leaf photosynthesis, leaf expansion and leaf transpiratione1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“investigated in vegetative tomato plants”
e1“after only 1.d of Ca-starvation, leaf photosynthesis, leaf expansion and leaf transpiration were already reduced and root growth had stopped completely”
Claim · model-written summary
Calcium starvation for 1 d stopped root growth in tomato.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- Ca-starvatione1
- Outcome
- root growthe1
- Direction
- stoppede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“investigated in vegetative tomato plants”
e1“after only 1.d of Ca-starvation, leaf photosynthesis, leaf expansion and leaf transpiration were already reduced and root growth had stopped completely”
Claim · model-written summary
Calcium starvation reduced leaf Ca concentration, with the strongest effect in the youngest leaves.
- Taxon
- tomatoSolanum lycopersicume0
- Organ / stage
- youngest leavese2
- Treatment
- Ca-starvatione2
- Outcome
- Leaf Ca concentratione2
- Direction
- reducede2
- Qualifier
- strongest effect in the youngest leavese2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“investigated in vegetative tomato plants”
e2“Leaf Ca concentration was reduced by a Ca-starvation with the strongest effect in the youngest leaves”
Claim · model-written summary
After 1 d of calcium starvation and 7 d of recovery, leaf photosynthesis and growth completely recovered in tomato.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- 1 d Ca-starvation period was followed by 7 d of recovery with full-strength nutrient solutione3
- Outcome
- leaf photosynthesis and growthe3
- Direction
- recoverede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“investigated in vegetative tomato plants”
e3“When 1 d Ca-starvation period was followed by 7 d of recovery with full-strength nutrient solution, leaf photosynthesis and growth completely recovered”
Claim · model-written summary
During recovery, Ca concentrations in the young leaves rose above those of control plants.
- Taxon
- tomatoSolanum lycopersicume0
- Organ / stage
- young leavese4
- Treatment
- recovery periode4
- Outcome
- Ca concentrations in the young leavese4
- Direction
- increasede4
- Comparator
- control plantse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“investigated in vegetative tomato plants”
e4“During the recovery period, Ca concentrations in the young leaves increased to higher values than these concentrations in the control plants”
Claim · model-written summary
During recovery, calcium uptake showed positive linear relationships with dry-matter increase and with water uptake in tomato.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- recovery periode5
- Outcome
- calcium uptakee5
- Direction
- positivee5
- Qualifier
- dry-matter increase of the plant as well as with water uptakee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“investigated in vegetative tomato plants”
e5“During the recovery period calcium uptake showed positive linear relationships with dry-matter increase of the plant as well as with water uptake”
Claim · model-written summary
Growth parameters correlated strongly with plant Ca concentration in tomato, but the relations differed between starvation and recovery.
- Taxon
- tomatoSolanum lycopersicume0
- Compound
- Cae6
- Outcome
- growth parameterse6
- Qualifier
- not always identical during starvation and recoverye6
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“investigated in vegetative tomato plants”
e6“Most of the measured growth parameters showed a strong correlation with the plant Ca concentration, but the relations were not always identical during starvation and recovery”
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See all 45 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.