Abstract
Gibberellin A4, gibberellin A7, and their mixture (60:40, GA4:GA7) were approximately equally effective in promoting female strobilus production on 3-year-old grafted mature scions of loblolly pine (Pinustaeda L.). Gibberellin A3 was ineffective. The female flowering response to GA4/7 was proportional to the log of its concentration, but no significant effect on male flowering was observed. Topical application from June through September was the most effective mode of application. Application for shorter intervals during this period resulted in proportionately less flowering. GA was equally effective prior to and following female bud initiation, but most effective during both.
Publisher
Canadian Science Publishing
Subject
Ecology,Forestry,Global and Planetary Change
Cited by
26 articles.
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