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

Q3 Agricultural and Biological Sciences

Advances in horticultural science Pub Date : 2021-10-21 DOI:10.36253/ahsc-11519

G. Lowe, M. Shepherd, Terry J. Rose, C. Raymond

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引用次数: 0

Abstract

Strigolactone acts with other plant hormones to influence shoot architecture by suppressing axiliary 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 L-1 and 1.5 mg L-1), with and without auxin. By 21 days post-treatment, GR24 at both rates had significantly (p<0.05), reduced the mean number of axiliary 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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Strigolactone类似物GR24减少茶树、互叶千层（Maiden&Betche）Cheel的腋芽脱落和生长

独角麦内酯与其他植物激素共同作用，通过抑制腋芽的生长来影响茎结构。己金内酯的合成类似物(如GR24)的外源应用已被研究作为一种管理许多作物植物结构的方法。在本研究中，我们测试了GR24是否可以用于抑制茶树(千层树)无性系繁殖体的芽生长，以保持机器种植所需的“单茎”形态。GR24以2种剂量(0.5 mg L-1和1.5 mg L-1)施用于茶树的无头根插条，添加和不添加生长素。处理21 d后，与未处理的对照(8.9±0.6芽)相比，GR24处理组的平均腋芽数(分别为5.7±0.4和5.5±0.3芽)显著减少(p<0.05)。当生长素与GR24同时施用时，对芽的抑制程度再次显著提高。尽管如此，没有任何外源激素处理在抑制芽生长方面能像完整对照植物(1.1±0.4个芽)的顶端优势那样有效。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Advances in horticultural science Agricultural and Biological Sciences-Horticulture

CiteScore

1.20

自引率

0.00%

发文量

审稿时长

12 weeks

期刊介绍： Advances in Horticultural Science aims to provide a forum for original investigations in horticulture, viticulture and oliviculture. The journal publishes fully refereed papers which cover applied and theoretical approaches to the most recent studies of all areas of horticulture - fruit growing, vegetable growing, viticulture, floriculture, medicinal plants, ornamental gardening, garden and landscape architecture, in temperate, subtropical and tropical regions. Papers on horticultural aspects of agronomic, breeding, biotechnology, entomology, irrigation and plant stress physiology, plant nutrition, plant protection, plant pathology, and pre and post harvest physiology, are also welcomed. The journal scope is the promotion of a sustainable increase of the quantity and quality of horticultural products and the transfer of the new knowledge in the field. Papers should report original research, should be methodologically sound and of relevance to the international scientific community. AHS publishes three types of manuscripts: Full-length - short note - review papers. Papers are published in English.