Characterisation of Breadfruit (Artocarpus altilis) Plants Growing on Lakoocha (A. lakoocha) Rootstocks

Yuchan Zhou; Steven Underhill

doi:10.3390/horticulturae8100916

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Characterisation of Breadfruit (Artocarpus altilis) Plants Growing on Lakoocha (A. lakoocha) Rootstocks

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Characterisation of Breadfruit (Artocarpus altilis) Plants Growing on Lakoocha (A. lakoocha) Rootstocks

Yuchan Zhou and Steven Underhill

Horticulturae, Vol.8(10), pp.1-12

2022

DOI: https://doi.org/10.3390/horticulturae8100916

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Abstract

rootstock

scion

dwarfing

phenotype

non-structural carbohydrate

stems

roots

Artocarpus altilis

Artocarpus lakoocha

Breadfruit (Artocarpus altilis) is a traditional fruit tree of 15–30 m tall in Oceania. The species is a staple crop for food security in the tropics. Tree loss from tropical windstorms, together with transition toward high density planting has driven an interest in the dwarf phenotype of the species. Information on dwarfing rootstocks for breadfruit is currently limited. The aim of this study was to assess the performance of breadfruit growth with lakoocha (Artocarpus lakoocha) as rootstocks. We compared the phenotype of breadfruit trees on lakoocha rootstocks with those on self graft and non graft within 21 months after grafting. These led to the discovery of a rootstock induced dwarf trait in breadfruit species. Breadfruit scions on lakoocha rootstocks displayed a reduction in tree height, stem thickness, and internode length, with fewer branches and leaves, resulting in about 32% of the standard height at the end of 21 months after grafting. These suggest lakoocha rootstocks have the potential to control breadfruit tree vigor. Non structural carbohydrate analysis showed the composite trees exhibited lower hexose concentration in both scion stems and roots, but higher sucrose level in scion stems, and higher starch level in roots. The significance of these parameters in rootstock dwarfing is discussed.

Details

Title: Characterisation of Breadfruit (Artocarpus altilis) Plants Growing on Lakoocha (A. lakoocha) Rootstocks
Authors: Yuchan Zhou (Corresponding Author) - University of the Sunshine Coast, Queensland, Australian Centre for Pacific Islands Research
Steven Underhill (Author) - University of the Sunshine Coast, Queensland, Australian Centre for Pacific Islands Research
Publication details: Horticulturae, Vol.8(10), pp.1-12
Publisher: MDPI AG
Date published: 2022
DOI: 10.3390/horticulturae8100916
ISSN: 2311-7524
Copyright note: © 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/).
Organisation Unit: Australian Centre for Pacific Islands Research; University of the Sunshine Coast, Queensland; Sustainability Research Cluster
Language: English
Record Identifier: 99678891802621
Output Type: Journal article