Abstract
BACKGROUND: Rhizosphere bacterial community and endophytes are now known to influence plant health and response to environmental stress. Very few studies have reported the diversity of endophytic bacterial communities of Vanilla planifolia and their potential roles in promoting plant growth or contributing to aromatic quality. RESULTS: In this study, the composition and diversity of the Vanilla rhizosphere bacterial community were explored by analyzing rhizosphere soil and root tissue samples as well as green pods of three accessions of Vanilla planifolia grown on different types of substrates (compost and leaf litter). In addition, the endophytic bacterial diversity of roots and green pods as well as the evolution of endophytic bacteria after the curing process of vanilla green pods were analyzed based on a metabarcoding approach. The results showed that bacterial species richness and diversity were higher in the compost. The analysis of the soil bacterial composition displayed that Halomonas, Pseudoalteromonas, Enterobacter and Bradyrhizobium were the most abundant genera. Moreover, the results indicated that the soil bacterial community structure was linked to the host plant genotype. Regarding the roots endophytic bacteria composition, the genera Halomonas, Pseudoalteromonas, Bacillus and Carboxydocella genera were present in all samples, independently from the substrate nature. Several genera including Bacillus, Bradyrhizobium, Burkholderia and Halomonas were transmitted internally from the roots to the green pods. The curing process reduced the bacterial richness and bacterial diversity associated with the green pods. Halomonas, Pseudoalteromonas, Bacillus, and Carboxydocella are the dominant genera in the pods after the curing process. CONCLUSIONS: This study provides an overview of changes of the bacterial communities dynamics especially endophytic in the roots and the green pods. It highlighted bacterial genera (Halomonas, Pseudoalteromonas, Bacillus, and Carboxydocella) potentially implicated in the formation of aroma compounds of vanilla beans.
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Claims 8
Claim · model-written summary
Bacterial richness and diversity were higher in compost.
- Taxon
- Vanilla planifolia
Vanilla planifoliat0 - Outcome
- bacterial species richness and diversitye0
- Direction
- highere0
- Setting
- composte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“bacterial species richness and diversity were higher in the compost”
t0“Vanilla planifolia”
Claim · model-written summary
Halomonas, Pseudoalteromonas, Enterobacter and Bradyrhizobium were the most abundant soil genera.
- Taxon
- Vanilla planifoliaVanilla planifoliat0
- Interactor
- Halomonas, Pseudoalteromonas, Enterobacter and Bradyrhizobium
Bradyrhizobium
Enterobacter.jpg?width=60)
HalomonasPseudoalteromonase0other - Outcome
- most abundant generae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Halomonas, Pseudoalteromonas, Enterobacter and Bradyrhizobium were the most abundant genera”
t0“Vanilla planifolia”
Claim · model-written summary
Soil bacterial community structure was linked to host genotype.
- Taxon
- Vanilla planifoliaVanilla planifoliat0
- Material
- host plant genotypee0
- Outcome
- soil bacterial community structuree0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the soil bacterial community structure was linked to the host plant genotype”
t0“Vanilla planifolia”
Claim · model-written summary
Halomonas, Pseudoalteromonas, Bacillus and Carboxydocella occurred in all root samples regardless of substrate.
- Taxon
- Vanilla planifoliaVanilla planifoliat0
- Interactor
- Halomonas, Pseudoalteromonas, Bacillus and Carboxydocellae0other
- Outcome
- present in all samplese0
- Qualifier
- independently from the substrate naturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Halomonas, Pseudoalteromonas, Bacillus and Carboxydocella genera were present in all samples, independently from the substrate nature”
t0“Vanilla planifolia”
Claim · model-written summary
Bacillus, Bradyrhizobium, Burkholderia and Halomonas were transmitted internally from roots to green pods.
- Taxon
- Vanilla planifoliaVanilla planifoliat0
- Interactor
- Bacillus, Bradyrhizobium, Burkholderia and Halomonase0other
- Outcome
- transmitted internally from the roots to the green podse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bacillus, Bradyrhizobium, Burkholderia and Halomonas were transmitted internally from the roots to the green pods”
t0“Vanilla planifolia”
Claim · model-written summary
Curing reduced bacterial richness and diversity in green pods.
- Taxon
- Vanilla planifoliaVanilla planifoliat0
- Organ / stage
- green podse0
- Treatment
- curing processe0
- Outcome
- bacterial richness and bacterial diversitye0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The curing process reduced the bacterial richness and bacterial diversity associated with the green pods.”
t0“Vanilla planifolia”
Claim · model-written summary
Halomonas, Pseudoalteromonas, Bacillus and Carboxydocella dominated cured pods.
- Taxon
- Vanilla planifoliaVanilla planifoliat0
- Interactor
- Halomonas, Pseudoalteromonas, Bacillus, and Carboxydocellae0other
- Outcome
- dominant genera in the podse0
- Qualifier
- after the curing processe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Halomonas, Pseudoalteromonas, Bacillus, and Carboxydocella are the dominant genera in the pods after the curing process”
t0“Vanilla planifolia”
Claim · model-written summary
Authors proposed that four bacterial genera might contribute to vanilla bean aroma compounds.
- Taxon
- Vanilla planifoliaVanilla planifoliat0
- Interactor
- Halomonas, Pseudoalteromonas, Bacillus, and Carboxydocellae0other
- Outcome
- formation of aroma compounds of vanilla beanse0
- Qualifier
- potentially implicatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Halomonas, Pseudoalteromonas, Bacillus, and Carboxydocella) potentially implicated in the formation of aroma compounds of vanilla beans”
t0“Vanilla planifolia”