Benzyladenine delays immature fruit abscission but does not affect final fruit set or kernel size of Macadamia

Stephen J Trueman

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Benzyladenine delays immature fruit abscission but does not affect final fruit set or kernel size of Macadamia

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Benzyladenine delays immature fruit abscission but does not affect final fruit set or kernel size of Macadamia

Stephen J Trueman

African Journal of Agricultural Research, Vol.5(12), pp.1523-1530

2010

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Abstract

auxin

benzylaminopurine

cytokinin

fruit drop

gibberellin

nut

paclobutrazol

plant growth regulators

pollen tubes

Proteaceae

Macadamia is a mass-flowering subtropical rainforest tree that is widely cultivated for its edible kernels. Macadamia flowers are borne on pendant racemes of 100 - 300 flowers but typically less than 2% of the flowers produce mature fruits and kernels. This study investigated the use of plant growth regulators to reduce abscission of flowers and immature fruit and to increase final fruit set of Macadamia. Pre-anthesis applications of the cytokinin, benzyladenine at 200 mg/L, increased initial fruit sets (2 weeks after anthesis) across four experiments from 8 - 17% (for control racemes) to 27 - 61% (for treated racemes). Post-anthesis applications of benzyladenine increased fruit retention up to 8 weeks after anthesis, but no treatment increased fruit retention beyond the final phase of immature fruit drop at 10 weeks post-anthesis. Benzyladenine delayed abscission of immature Macadamia fruit but it had no effect on final fruit set, nut-in-shell weight or kernel weight.

Details

Title: Benzyladenine delays immature fruit abscission but does not affect final fruit set or kernel size of Macadamia
Authors: Stephen J Trueman (Author) - University of the Sunshine Coast - Faculty of Science, Health and Education
Publication details: African Journal of Agricultural Research, Vol.5(12), pp.1523-1530
Publisher: Academic Journals
Date published: 2010
ISSN: 1991-637X
Copyright note: Copyright © 2010 Academic Journals. Reproduced here in accordance with the copyright policy of the publisher. This is an open-access article distributed under the terms of the Creative Commons Attribution 3.0 License..
Organisation Unit: School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland; GeneCology Research Centre - Legacy
Language: English
Record Identifier: 99449997502621
Output Type: Journal article

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