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Gibberellin-enhanced elongation of inverted Pharbitis nil shoot prevents the release of apical dominanceEthylene evolution resulting from the gravity stress of shoot inversion appears to induce the release of apical dominance in Pharbitis nil (L.) by inhibiting elongation of the inverted shoot. It has been previously demonstrated that this shoot inversion release of apical dominance can be prevented by promoting elongation in the inverted shoot via interference with ethylene synthesis or action. In the present study it was shown that apical dominance release can also be prevented by promoting elongation of the inverted shoot via treatment with gibberellic acid (GA3). A synergistic effect was observed when AgNO3, the ethylene action inhibitor, was applied with GA3. Both GA3 and AgNO3 increased ethylene production in the inverted shoot. These results are consistent with the view that it is ethylene-induced inhibition of elongation and not any direct effect of ethylene per se which is responsible for the outgrowth of the highest lateral bud.
Document ID
Acquisition Source
Document Type
Reprint (Version printed in journal)
Prasad, T. K.
(Ohio State University Columbus 43210, United States)
Cline, M. G.
Date Acquired
August 21, 2013
Publication Date
January 1, 1987
Publication Information
Publication: Plant science (Shannon, Ireland)
Volume: 49
ISSN: 0168-9452
Subject Category
Life Sciences (General)
Funding Number(s)
Distribution Limits
NASA Discipline Number 40-10
NASA Discipline Plant Biology
NASA Program Space Biology
Non-NASA Center

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