Claim · model-written summary
Acid treatment increased whole maize root elongation, localized to the apical accelerating zone.
- Organ / stage
- accelerating zone (apical 0–4 mm)e0
- Treatment
- pH 3.4e0
- Outcome
- Whole root elongation ratee0
- Direction
- increasede0
- Comparator
- pH 7.0e0
Zea maysNot reportedMaterialGeneCompoundInteractorInteractor roleSecond interactorSecond interactor roleSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The apoplast pH of maize roots growing in hydroponics was altered from pH 7.0 to pH 3.4 using 2 mol m−3 citrate-phosphate buffer or unbuffered solutions. Whole root elongation rate rapidly increased and measurement of the local growth profile indicated that this increase in growth occurred in young cells in the accelerating zone (apical 0–4 mm) while more proximal growing cells were unaffected”
Title
Acid-induced wall loosening is confined to the accelerating region of the root growing zone
S. Winch; J. Pritchard Journal of Experimental Botany 1999. doi:10.1093/jxb/50.338.1481
Other claims from this paper (6)
- Intervention effect More proximal growing maize root cells were unaffected by the acid treatment.
- Intervention effect Unbuffered pH-matched solutions produced qualitatively similar growth responses.
- Intervention effect Single-cell turgor pressures did not change between pH treatments.
- Intervention effect Single-cell osmotic pressure and water potential did not significantly differ between pH treatments.
- Intervention effect Acid pH increased net solute import at the root tip three- to fourfold.
- Mechanism Acid-induced growth change was attributed to increased cell wall loosening rather than turgor.