Claim · model-written summary
The authors suggested MCPA phytotoxicity with nutrients may arise from depletion of root available carbohydrate.
- Taxon
- Solanum lycopersicum (Tomato)
Solanum lycopersicumt0 - Treatment
- 2-methyl-4-chlorophenoxyacetic acide0
- Compound
- ‘available carbohydrate’e0
- Outcome
- phytocidal effecte0
Not reportedMaterialGeneOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the phytocidal effect of 2-methyl-4-chlorophenoxyacetic acid in the presence of nutrient may be due to depletion of the ‘available carbohydrate’ supplies in the roots”
t0“Solanum lycopersicum (Tomato)”
Title
A. RHODES Journal of Experimental Botany 1952. doi:10.1093/jxb/3.2.129
Other claims from this paper (19)
- Method / resource Residual dry weight revealed features obscured by conventional reporting bases.
- Intervention effect MCPA greatly inhibited tomato growth measured as residual dry weight soon after spraying, with and without nutrients.
- Intervention effect MCPA greatly diminished tomato net assimilation rate.
- Intervention effect MCPA appeared to diminish total nitrogen uptake to a smaller extent.
- Intervention effect MCPA appeared to diminish P2O5 uptake to a smaller extent.
- Mechanism The authors inferred a larger share of carbohydrate was used for amino-acid and protein synthesis under MCPA.
- Intervention effect MCPA did not show evidence of depleting whole-plant available carbohydrate.
- Observation Available carbohydrate rose steadily in every treatment throughout the experiment.
- Intervention effect MCPA greatly reduced the rate of increase in available carbohydrate.
- Observation Root available carbohydrate increased steadily without MCPA.
- Observation Root available carbohydrate increased steadily under MCPA with water only.
- Observation Under MCPA with nutrients, root available carbohydrate rose from 8 to about 10 mg per plant over two days.
- Observation Under MCPA with nutrients, root available carbohydrate then fell to about 6 mg and stayed low.
- Mechanism Reduced transport from tops was proposed as one contributor to root carbohydrate depletion.
- Mechanism Relatively greater carbohydrate use was proposed as another contributor to depletion.
- Recommendation The authors recommended MCPA when root carbohydrate reserves are minimal.
- Intervention effect MCPA prevented net starch synthesis.
- Intervention effect MCPA still permitted appreciable net sucrose formation.
- Intervention effect MCPA appeared not to affect uptake of potassium, calcium or magnesium.