Claim · model-written summary
The response to IAA below 10 micromolar with gravistimulation was approximately the sum of the responses to gravistimulation alone and to IAA alone.
- Taxon
- Avena sativa
Avena sativae0 - Organ / stage
- Pulvinie0
- Treatment
- IAA at levels less than 10 micromolar, with gravistimulatione4
- Outcome
- responsee4
- Direction
- approximately the sume4
- Comparator
- gravistimulation alonee4
Not reportedMaterialGeneCompoundInteractorInteractor roleSecond interactorSecond interactor roleSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“Pulvini of excised segments from oats (Avena sativa L. cv Victory)”
e4“the response to IAA at levels less than 10 micromolar, with gravistimulation, was approximately the sum of the responses to gravistimulation alone and to IAA without gravistimulation”
Title
Thomas G. Brock; Peter B. Kaufman PLANT PHYSIOLOGY 1988. doi:10.1104/pp.87.1.130
Other claims from this paper (8)
- Intervention effect Optimum pulvinus elongation and curvature over 24 hours were produced by 100 micromolar IAA in vertical segments.
- Intervention effect Curvature response to IAA above 100 micromolar on gravistimulated pulvini was significantly less than on vertical segments.
- Association The bending response to 100 micromolar IAA did not vary significantly across presentation angles from 0 to 90 degrees.
- Intervention effect GA3 at 0.3-30 micromolar significantly enhanced pulvinus growth and segment curvature in horizontal segments.
- Intervention effect Exogenous GA3 over a range of concentrations had no effect on pulvinus elongation or curvature in vertical segments.
- Intervention effect GA3 at 10 micromolar plus IAA had an additive effect in both vertical and horizontal segments.
- Association Gravistimulation changes pulvinus responsiveness to both IAA and GA3, with the change unique to each regulator.
- Mechanism The changes in responsiveness may result from cellular-level processes other than changes in hormonal sensitivity.