Claim · model-written summary
After about 20 days, root growth rates recovered and exceeded those at low acidity.
- Taxon
- soybean
Glycine maxe2 - Treatment
- increasing aciditye1
- Outcome
- Root growth ratese1
- Direction
- exceedede0
- Qualifier
- about 20 dayse1
- Comparator
- low aciditye0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“then recovered to rates which exceeded those at low acidity”
e1“Root growth rates were reduced for about 20 days by increasing acidity”
e2“soybean (Glycine max [L.] Merrill) plants”
Title
Thomas W. Rufty,; C. David Raper,; William A. Jackson Botanical Gazette 1982. doi:10.1086/337264
Other claims from this paper (11)
- Intervention effect Increasing acidity reduced soybean root growth rates for about 20 days.
- Observation Root mass was similar across acidity treatments after 30 days.
- Intervention effect Increasing acidity enhanced nitrate uptake rate per unit root mass within the first day, with rates remaining constant thereafter.
- Intervention effect Higher acidity restricted total nitrate uptake until about day 20.
- Intervention effect Higher acidity restricted shoot growth rates until about day 20.
- Intervention effect After day 20, total nitrate uptake recovered and exceeded that at low acidity.
- Intervention effect After day 20, shoot growth rates recovered and exceeded those at low acidity.
- Intervention effect As acidity increased, anion uptake increased relative to cation uptake.
- Intervention effect At higher acidity, soybean plants reduced more nitrate, generating more internal hydroxide ions.
- Intervention effect At higher acidity, plant tissues contained less organic anion.
- Mechanism Root-zone acidity influenced the partitioning of internally generated hydroxide between organic-anion synthesis and efflux.