Diversity and antimicrobial potential of the culturable rhizobacteria from medicinal plant Baccharis trimera Less D.C

Plant microbiota is usually enriched with bacteria producers of secondary metabolites and represents a valuable source of novel species and compounds. Here, we analyzed the diversity of culturable root-associated bacteria of the medicinal native plant Baccharis trimera (Carqueja) and screened promis...

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Bibliographic Details
Published in:Brazilian journal of microbiology 2022-09, Vol.53 (3), p.1409-1424
Main Authors: Jardim, Ana Camila Munis, de Oliveira, Jéssica Ellen, Alves, Luana de Moura, Gutuzzo, Giovana Oliveira, de Oliveira, André Luiz Martinez, Rodrigues, Elisete Pains
Format: Article
Language:English
Subjects:
Anti-Bacterial Agents - metabolism
Anti-Bacterial Agents - pharmacology
Antifungal activity
Antifungal Agents - metabolism
Antifungal Agents - pharmacology
Antiinfectives and antibacterials
Antimicrobial agents
Baccharis
Baccharis - metabolism
Bacteria
Biomedical and Life Sciences
Biosurfactants
Environmental Microbiology - Research Paper
Food Microbiology
Fungicides
Herbal medicine
Humans
Indigenous plants
Life Sciences
Medical Microbiology
Medicinal plants
Metabolites
Microbial Ecology
Microbial Genetics and Genomics
Microbiology
Microbiota
Mycology
Plant bacterial diseases
Plant growth
Plant Roots - microbiology
Plants, Medicinal
Rhizosphere
rRNA 16S
Secondary metabolites
Siderophores
Siderophores - metabolism
Species
Species diversity
Streptomyces
Surfactants
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Summary:Plant microbiota is usually enriched with bacteria producers of secondary metabolites and represents a valuable source of novel species and compounds. Here, we analyzed the diversity of culturable root-associated bacteria of the medicinal native plant Baccharis trimera (Carqueja) and screened promising isolates for their antimicrobial properties. The rhizobacteria were isolated from the endosphere and rhizosphere of B. trimera from Ponta Grossa and Ortigueira localities and identified by sequencing and restriction analysis of the 16S rDNA. The most promising isolates were screened for antifungal activities and the production of siderophores and biosurfactants. B. trimera presented a diverse community of rhizobacteria, constituted of 26 families and 41 genera, with a predominance of Streptomyces and Bacillus genera, followed by Paenibacillus , Staphylococcus , Methylobacterium , Rhizobium , Tardiphaga , Paraburkholderia , Burkholderia , and Pseudomonas . The more abundant genera were represented by different species, showing a high diversity of the microbiota associated to B. trimera . Some of these isolates potentially represent novel species and deserve further examination. The communities were influenced by both the edaphic properties of the sampling locations and the plant niches. Approximately one-third of the rhizobacteria exhibited antifungal activity against Sclerotinia sclerotiorum and Colletotrichum gloeosporioides , and a high proportion of isolates produced siderophores (25%) and biosurfactants (42%). The most promising isolates were members of the Streptomyces genus. The survey of B. trimera returned a diverse community of culturable rhizobacteria and identified potential candidates for the development of plant growth-promoting and protection products, reinforcing the need for more comprehensive investigations of the microbiota of Brazilian native plants and habitats.
ISSN:1517-8382
1678-4405
DOI:10.1007/s42770-022-00759-5