Strigolactone analogue GR24 reduces axillary bud out break and growth in tea tree, Melaleuca alternifolia (Maiden & Betche) Cheel

G E Lowe; Mervyn Shepherd; C Raymond

doi:10.36253/ahsc-11519

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Strigolactone analogue GR24 reduces axillary bud out break and growth in tea tree, Melaleuca alternifolia (Maiden & Betche) Cheel

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Strigolactone analogue GR24 reduces axillary bud out break and growth in tea tree, Melaleuca alternifolia (Maiden & Betche) Cheel

G E Lowe, Mervyn Shepherd and C Raymond

Advances in Horticultural Science, Vol.35(4), pp.399-405

2021

DOI: https://doi.org/10.36253/ahsc-11519

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Abstract

Auxin

axillary bud release

shoot architecture

tea tree

Crop and pasture production not elsewhere classified

Strigolactone acts with other plant hormones to influence shoot architecture by suppressing axillary bud outgrowth. The exogenous application of synthetic analogues of strigolactone, such as GR24, have been investigated as a way to manage plant architecture in a number of crops. In this study we test whether GR24 can be used to supress bud outgrowth in clonal propagules of tea tree (Melaleuca alternifolia) in order to retain a “single stem” form desirable for machine planting. GR24 was applied to decapitated rooted cuttings of tea tree at two rates (0.5 mg L1 and 1.5 mg L1), with and without auxin. By 21 days post treatment, GR24 at both rates had significantly (p<0.05), reduced the mean number of axillary buds (5.7±0.4 and 5.5±0.3 buds respectively) compared to decapitated untreated control plants (8.9±0.6 buds). Suppression of buds was significantly higher again when auxin was applied in conjunction with GR24. Nonetheless, no exogenous hormone treatment was as effective at suppressing bud outgrowth as the apical dominance that occurred in intact control plants (1.1±0.4 buds).

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Title: Strigolactone analogue GR24 reduces axillary bud out break and growth in tea tree, Melaleuca alternifolia (Maiden & Betche) Cheel
Creators: G E Lowe - Southern Cross University
Mervyn Shepherd - Southern Cross University
C Raymond - Southern Cross University
Publication Details: Advances in Horticultural Science, Vol.35(4), pp.399-405
Publisher: Firenze University Press
Identifiers: 991012997198002368
Copyright: Copyright (c) 2021 Gail Lowe, Mervyn Shepherd, Terry Rose, Carolyn Raymond This work is licensed under a Creative Commons Attribution 4.0 International License.
Academic Unit: Faculty of Science and Engineering; Southern Cross Plant Science; Science
Language: English
Resource Type: Journal article

Strigolactone analogue GR24 reduces axillary bud out break and growth in tea tree, Melaleuca alternifolia (Maiden & Betche) Cheel

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