Flower induction by exogenous plant hormones in Scots pine and Norway spruce grafts.

Abstract

The aim of the present study was to establish whether hormone treatments would promote flowering in Scots pine ( L.) and Norway spruce ( (L.) H. Karst.) grafts under Finnish conditions. Also, an attempt was made to test the efficiency of hormones as well as the variation in response among different clones. Six Scots pine and six Norway spruce clones were selected in each seed orchard based on their flowering intensity, and treated with growth hormones (GA, NAA) of different dosages by spraying. Flowering was observed one year after the treatments.Pinus sylvestrisPicea abies