Articles
THE EFFECT OF SEEDS AND THE APPLICATION OF A GROWTH REGULATOR MIXTURE, ON FRUIT GROWTH IN ‘HAYWARD’ KIWIFRUIT.
Article number
329_22
Pages
128 – 130
Language
Abstract
In a field trial the increased fruit size response to the synthetic cytokinin N-(2-chloro-4-pyridyl)-N-phenylurea (CPPU) at 20 ppm was enhanced significantly when applied in combination with 2,4-dichlorophenoxyacetic acid (2,4-D) at 2.5 ppm, and gibberellic acid (GA3) at 5 ppm, to fruit with both low and high seed number.
Low and high seeded fruit treated with the hormone mix had mean fresh weights of 102 and 136 g respectively, compared with 47 and 90 g in untreated fruit.
The mean fruit weights for CPPU alone of 81 g and 120 g, were increased by 21 and 16 g by the addition of the hormone mix.
In tissue culture there was no callus growth by fruit pericarp tissue in the absence of hormones, even when seed were present.
A mix of 2,4-D + GA3 + 6 benzylaminopurine (BAP) resulted in callus growth.
The greatest stimulation of the callus growth occurred with this hormone mix in the presence of seeds.
Low and high seeded fruit treated with the hormone mix had mean fresh weights of 102 and 136 g respectively, compared with 47 and 90 g in untreated fruit.
The mean fruit weights for CPPU alone of 81 g and 120 g, were increased by 21 and 16 g by the addition of the hormone mix.
In tissue culture there was no callus growth by fruit pericarp tissue in the absence of hormones, even when seed were present.
A mix of 2,4-D + GA3 + 6 benzylaminopurine (BAP) resulted in callus growth.
The greatest stimulation of the callus growth occurred with this hormone mix in the presence of seeds.
Authors
J.G. Cruz-Castillo, D.J. Woolley, G.S. Lawes
Keywords
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