Journal article

Bacterial communities associated with natural and commercially grown rooibos (Aspalathus linearis)

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Publication Details

Author list: Brink CJ, Postma A, Slabbert E, Postma F, Muasya AM, Jacobs K.

Publisher: Elsevier

Publication year: 2020

Journal: Pedosphere

Volume number: 30

Issue number: 6

Start page: 778

End page: 790

Total number of pages: 13

ISSN: 1002-0160


Aspalathus linearisis a commercially important plant species endemic to the Cape Floristic Region of South Africa and is used to produce a herbal teaknown as rooibos tea. Symbiotic interactions betweenA. linearisand soil bacteria play an important role in the survival ofAspalathusplants in the highlynutrient-poor, acidic fynbos soil. The aim of this study was to characterize and compare rhizosphere and bulk soil bacterial communities associated withnatural and commercially grownA. linearis, as well as the effect of seasonal changes on these communities. Bacterial communities were characterizedusing high throughput amplicon sequencing, and their correlations with soil chemical properties were investigated. The N-fixing bacterial community wascharacterized using terminal restriction fragment length polymorphism and real time quantitative polymerase chain reaction. Actinobacteria, Proteobacteria,and Acidobacteria were the most dominant bacterial phyla detected in this study. Highly similar bacterial communities were associated with natural andcommercially grown plants. Significant differences in the bacterial community were observed between rhizosphere and bulk soils collected in the dry season,while no significant differences were detected in the wet season.


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Last updated on 2021-24-02 at 15:40