Claim · model-written summary
Restoring root-medium water potential to zero transiently accelerated growth.
- Treatment
- water potential was suddenly increased back to 0 bare0
- Outcome
- growthe0
- Direction
- acceleratede0
Zea maysNot reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When the water potential was suddenly increased back to 0 bar, growth accelerated transitorily to a high rate before slowing to the steady state rate”
t0“Maize Leaves”
Title
Immediate and Subsequent Growth Responses of Maize Leaves to Changes in Water Status
Edmundo Acevedo; Theodore C. Hsiao; D. W. Henderson PLANT PHYSIOLOGY 1971. doi:10.1104/pp.48.5.631
Other claims from this paper (16)
- Observation Maize leaf elongation was stable with adequate water.
- Association Maize leaf elongation slowed as soil water potential fell from -0.1 to -0.2 bar.
- Association Maize leaf elongation stopped at soil water potential of -2.5 bars.
- Observation The corresponding leaf water potential ranged from -2.8 to -7 bars.
- Intervention effect After rewatering, elongation of mildly water-stressed maize resumed within seconds.
- Intervention effect A sudden drop in root-medium water potential below zero initially stopped growth.
- Intervention effect After a sudden drop in root-medium water potential, growth resumed at a lower rate.
- Observation After the transient acceleration, growth slowed to the steady-state rate.
- Mechanism The authors infer increased cell extensibility during water stress.
- Intervention effect After rewatering, leaves stressed for at least one day nearly attained control-leaf length.
- Intervention effect Post-rewatering growth rate did not exceed controls at the same developmental stage outside a short transient phase.
- Observation As stress developed, growth stopped before carbon dioxide assimilation declined noticeably.
- Observation As stress developed, carbon dioxide assimilation decreased after growth stopped.
- Intervention effect After short mild stress, transient rapid growth compensated completely for reduced elongation.
- Mechanism The authors infer that processes for cell expansion may continue during stress.
- Mechanism The authors infer that water uptake directly supplies physical force for cell enlargement.