Effect of BA + GA4+7, BA, and Daminozide on Growth and Lateral Shoot Development in Peach

Abstract

The effects of BA alone or in combination with GA4+7 and with either daminozide or a surfactant on growth and lateral development of peach [Prunus persica (L.) cv. Redhaven] were evaluated at 4 stages of terminal growth. BA + GA4+7 at 500 ppm or 1000 ppm daminozide was the most effective treatment for inducing lateral development when applied at terminal growth of 15-20 cm or 31-36 cm. BA + GA4+7 increased both tree height and average internode length for all treatments. BA with either surfactant or daminozide was not effective in inducing lateral shoot formation and caused shorter internodes and retarded tree growth in all treatment combinations except 250 ppm + 1000 ppm daminozide. Chemical names used: N-(phenylmethyl)-1H-purin-6-amine (BA) and (1α,2β,4aα,4bβ,10β)-2,4a,7-trihydroxy-l-methyl-8-methylenegibb-3-ene-l,10-dicarboxylic acid 1,4a-lactone (GA4+7).

Effect of Growth Regulators on the Vegetative Growth of Boronia megastigma ‘Lutea’

“…Benzyladenine has been used to promote branching in B. heterophylla (12). Promalin, a mixture of benzyladenine and GA4+7, was used in this case because it is a commercial formulation and the m ixture of benzyl adenine and GA4+7 was found to promote branch formation and elongation in peach (4). A broad range of concentrations was tested for each growth regulator.…”