Journal article
Tree root interactions revealed by metabarcoding in agroforestry systems
Acta Horticulturae, Vol.1355(1355), pp.125-132
International Horticultural Congress (IHC2022), XXXI (Angers, France, 14-Aug-2022 - 20-Aug-2022)
2022
Abstract
Both cocoa and coffee are important cash crops that are usually interplanted under shade trees in agroforestry practices. Competition between roots of cash crops and neighboring trees remains a major knowledge gap. Ideal agroforestry shade trees would develop their root systems below the cocoa and coffee root zones, minimizing plant competition for nutrient uptake in the soil layers. Assessment of root development in soil remains highly challenging. Destructive excavation provides root biomass and root morphology data. However, it is not possible to identify the species of fine roots that are present in different soil zones in a mixed-species plantation. We selected two adjacent cocoa and coffee plantations where Canarium indicum was used as a shade tree. We used DNA meta-barcoding to determine the presence and abundance of fine roots of each species in the soil profile to a depth of 80 cm. Cocoa and coffee had higher fine-root abundance at 0-30 cm depth, whereas canarium had higher fine-root abundance at 30-80 cm depth. Our study indicated that canarium could be a suitable shade tree for cocoa and coffee. DNA metabarcoding allowed us to develop a deeper understanding of root development through the tropical soil profile and can be used to manage agroforestry systems.
Details
- Title
- Tree root interactions revealed by metabarcoding in agroforestry systems
- Authors
- S. Hosseini-Bai (Corresponding Author) - Griffith UniversityR. Wilson (Author) - Griffith UniversityG. Hannet (Author) - National Agricultural Research InstituteA. Keller (Author) - University of WürzburgA. Shapcott (Author) - University of the Sunshine Coast, Queensland, Centre for BioinnovationB. Komolong (Author) - National Agricultural Research InstituteM.B. Farrar (Author) - Griffith UniversityH.M. Wallace (Author) - Griffith University
- Publication details
- Acta Horticulturae, Vol.1355(1355), pp.125-132
- Conference details
- International Horticultural Congress (IHC2022), XXXI (Angers, France, 14-Aug-2022 - 20-Aug-2022)
- Publisher
- International Society for Horticultural Science
- DOI
- 10.17660/ActaHortic.2022.1355.16
- ISSN
- 2406-6168
- Organisation Unit
- Centre for Bioinnovation; School of Science and Engineering - Legacy; School of Science, Technology and Engineering
- Language
- English
- Record Identifier
- 99716196402621
- Output Type
- Journal article
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- Domestic collaboration
- International collaboration
- Web Of Science research areas
- Green & Sustainable Science & Technology
- Horticulture
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