What question did this study set out to answer?

To determine the mechanism by which gibberellic acid suppresses root formation in stem cuttings and test whether this inhibition results from metabolite diversion to extending shoots.

October 1, 1960Annals of Botany

Inhibition of Rooting of Cuttings by Gibberellic Acid: With one Figure in the Text

View Full Paper

Ask AI

Bookmark

Authors

PBP. W. BrianGoogle (United States)HHH. G. HemmingAstraZeneca (Sweden)DLDavid B. LoweClemson University

Discussion

Member takes

Implication

Experimental study reveals gibberellic acid directly suppresses root initiation in pea and bean cuttings, indicating a local block of early meristematic cell division.

Key Points

To determine the mechanism by which gibberellic acid suppresses root formation in stem cuttings and test whether this inhibition results from metabolite diversion to extending shoots.
Applied localized basal and apical doses of gibberellic acid and indolylacetic acid to pea and bean stem cuttings.
Evaluated root initiation and shoot extension in both intact and disbudded stem cuttings to isolate apical effects.
Basal application of gibberellic acid reduced rooting without promoting stem extension, while apical doses stimulated extension without suppressing rooting.
Disbudding stopped stem extension but did not diminish the rooting inhibition caused by gibberellic acid, refuting the metabolite diversion hypothesis.
Gibberellin A1 inhibited rooting with equal potency to gibberellic acid via a non-competitive antagonism against indolylacetic acid.

Cite This Study

Brian et al. (1960) studied this question.

synapsesocial.com/papers/6a9e93419ee9f07baff6c5bb https://doi.org/10.1093/oxfordjournals.aob.a083714

View Full Paper

Ask AI

Bookmark

Implication

Experimental study reveals gibberellic acid directly suppresses root initiation in pea and bean cuttings, indicating a local block of early meristematic cell division.

Inhibition of Rooting of Cuttings by Gibberellic Acid: With one Figure in the Text

Discussion

Member takes

Implication

Key Points

Cite This Study

Inhibition of Rooting of Cuttings by Gibberellic Acid: With one Figure in the Text

Discussion

Member takes

Implication

Key Points

Cite This Study

Also Consider

Also Consider