Claim · model-written summary
The secondary phloem to xylem proportion decreased at high concentrations in the base nutrient and sodium sulphate series.
- Taxon
- Tomato
Solanum lycopersicumt0 - Treatment
- high levels of salt concentratione0
- Outcome
- proportion of secondary phloem to xyleme0
- Direction
- decreasede0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the base nutrient and sodium sulphate series the proportion of secondary phloem to xylem was decreased at the high levels of salt concentration.”
t0“Tomato”
Title
H. E. Hayward; E. M. Long Botanical Gazette 1941. doi:10.1086/334980
Other claims from this paper (19)
- Intervention effect Higher solution concentration reduced tomato height, stem diameter and dry weight relative to lower levels.
- Observation Growth reductions were greatest under sodium sulphate and smallest in the base nutrient series.
- Intervention effect At high salt levels, vascular tissues showed a larger proportional reduction than cortex and pith parenchyma.
- Association High salt levels were associated with faster maturation and smaller vascular cells.
- Intervention effect Secondary xylem vessels were smaller at high concentrations across all solution series.
- Intervention effect Secondary xylem vessel walls were proportionally thicker at high concentrations.
- Observation The relative amounts of secondary xylem and phloem stayed approximately the same across sodium chloride levels.
- Intervention effect Mechanical tissue cells were smaller and thicker walled at high osmotic concentration in all series.
- Intervention effect High salt concentrations inhibited cambial activity in all series.
- Observation At equal osmotic concentration, cambial rate was greatest in base nutrient cultures and least in sodium sulphate cultures.
- Intervention effect At high salt concentration, tomato leaflets were thicker in sodium chloride and sodium sulphate cultures than in base nutrient cultures.
- Intervention effect High sodium chloride made leaves more succulent than base nutrient and sodium sulphate cultures.
- Observation High sodium sulphate cultures had very compact leaf palisade tissue.
- Observation Top dry matter percentage remained essentially constant across sodium chloride concentrations.
- Intervention effect Top dry matter percentage increased at high concentrations in base nutrient and sodium sulphate cultures.
- Intervention effect High sodium chloride retarded flower bud formation and delayed anthesis.
- Observation No flower buds had developed by harvest in sodium sulphate cultures at 4.5 atmospheres.
- Association Higher solution concentration increased sap osmotic concentration across all series.
- Association Increasing solution concentration increased sodium and chloride accumulation in tomato tops under sodium chloride treatment.