Abstract
The Cape fynbos biome in South Africa is home to highly diverse and endemic shrub legumes, which include species of Aspalathus, Polhillia, Wiborgia and Wiborgiella. These species play a significant role in improving soil fertility due to their ability to fix N2. However, information regarding their microbiome is still unknown. Using the 16S rRNA Miseq illumina sequencing, this study assessed the bacterial community structure associated with the rhizospheres of Polhillia pallens, Polhillia brevicalyx, Wiborgia obcordata, Wiborgia sericea and Wiborgiella sessilifolia growing at different locations during the wet and dry seasons in the Cape fynbos. The results showed that the most dominant bacterial phylum was Actinobacteria during both the dry (56.2–37.2%) and wet (46.3–33.3%) seasons. Unclassified bacterial genera (19.9–27.7%) were the largest inhabitants in the rhizospheres of all five species during the two seasons. The other dominant phyla included Bacteroidetes, Acidobacteria, Proteobacteria and Firmicutes. Mycobacterium and Conexibacter genera were the biggest populations found in the rhizosphere soil of all five test species during both seasons, except for W. obcordata soil sampled during the dry season, which had Dehalogenimonas as the major inhabitant (6.08%). In this study plant species and growth season were the major drivers of microbial community structure, with W. obcordata having the greatest influence on its microbiome than the other test species. The wet season promoted greater microbial diversity than the dry season.
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Claims 9
Claim · model-written summary
Actinobacteria was the dominant rhizosphere phylum in both seasons.
- Taxon
- Polhillia, Wiborgia and Wiborgiella
Polhillia
Wiborgia
Wiborgiellat0 - Interactor
- ActinobacteriaActinomycetotae0symbiont
- Outcome
- dominant bacterial phylum was Actinobacteriae0
- Value
- 56.2–37.2%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the most dominant bacterial phylum was Actinobacteria during both the dry (56.2–37.2%) and wet (46.3–33.3%) seasons”
t0“Polhillia, Wiborgia and Wiborgiella”
Claim · model-written summary
Unclassified bacterial genera were the largest rhizosphere inhabitants across all five species and both seasons.
- Taxon
- Polhillia, Wiborgia and WiborgiellaPolhilliaWiborgiaWiborgiellat0
- Interactor
- Unclassified bacterial generae0symbiont
- Outcome
- largest inhabitants in the rhizospherese0
- Value
- 19.9–27.7%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Unclassified bacterial genera (19.9–27.7%) were the largest inhabitants in the rhizospheres of all five species during the two seasons.”
t0“Polhillia, Wiborgia and Wiborgiella”
Claim · model-written summary
Bacteroidetes, Acidobacteria, and Proteobacteria were also dominant phyla.
- Taxon
- Polhillia, Wiborgia and WiborgiellaPolhilliaWiborgiaWiborgiellat0
- Outcome
- dominant phyla included Bacteroidetes, Acidobacteria, Proteobacteriae0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The other dominant phyla included Bacteroidetes, Acidobacteria, Proteobacteria and Firmicutes.”
t0“Polhillia, Wiborgia and Wiborgiella”
Claim · model-written summary
Firmicutes was also a dominant phylum.
- Taxon
- Polhillia, Wiborgia and WiborgiellaPolhilliaWiborgiaWiborgiellat0
- Outcome
- Firmicutese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The other dominant phyla included Bacteroidetes, Acidobacteria, Proteobacteria and Firmicutes.”
t0“Polhillia, Wiborgia and Wiborgiella”
Claim · model-written summary
Mycobacterium and Conexibacter were the largest genera in rhizosphere soil across species and seasons, apart from one exception.
- Taxon
- Polhillia, Wiborgia and WiborgiellaPolhilliaWiborgiaWiborgiellat0
- Interactor
- Mycobacterium
Mycobacteriume0symbiont - Second interactor
- Conexibacter
Conexibactere0symbiont - Outcome
- biggest populations found in the rhizosphere soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mycobacterium and Conexibacter genera were the biggest populations found in the rhizosphere soil of all five test species during both seasons”
t0“Polhillia, Wiborgia and Wiborgiella”
Claim · model-written summary
Dehalogenimonas was the major inhabitant of W. obcordata rhizosphere soil in the dry season at 6.08%.
- Taxon
- W. obcordata
Wiborgia obcordatae0 - Interactor
- Dehalogenimonas
Dehalogenimonase0symbiont - Outcome
- Dehalogenimonas as the major inhabitante0
- Value
- 6.08%e0
- Qualifier
- dry seasone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“W. obcordata soil sampled during the dry season, which had Dehalogenimonas as the major inhabitant (6.08%)”
Claim · model-written summary
Plant species and growth season were major drivers of microbial community structure.
- Taxon
- Polhillia, Wiborgia and WiborgiellaPolhilliaWiborgiaWiborgiellat0
- Outcome
- microbial community structuree0
- Qualifier
- plant species and growth seasone0
- Setting
- growth seasone0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant species and growth season were the major drivers of microbial community structure”
t0“Polhillia, Wiborgia and Wiborgiella”
Claim · model-written summary
W. obcordata had the greatest influence on its microbiome among tested species.
- Taxon
- W. obcordataWiborgia obcordatae0
- Outcome
- influence on its microbiomee0
- Direction
- greateste0
- Comparator
- other test speciese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“W. obcordata having the greatest influence on its microbiome than the other test species”
Claim · model-written summary
Wet season had greater microbial diversity than dry season.
- Taxon
- Polhillia, Wiborgia and WiborgiellaPolhilliaWiborgiaWiborgiellat0
- Outcome
- microbial diversitye0
- Direction
- greatere0
- Comparator
- dry seasone0
- Setting
- wet seasone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The wet season promoted greater microbial diversity than the dry season.”
t0“Polhillia, Wiborgia and Wiborgiella”