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Characterization of the olive endophytic community in genotypes displaying a contrasting response to Xylella fastidiosa
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Characterization of the olive endophytic community in genotypes displaying a contrasting response to Xylella fastidiosa
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Journal Article
Characterization of the olive endophytic community in genotypes displaying a contrasting response to Xylella fastidiosa
2024
Overview
Background
Endophytes mediate the interactions between plants and other microorganisms, and the functional aspects of interactions between endophytes and their host that support plant-growth promotion and tolerance to stresses signify the ecological relevance of the endosphere microbiome. In this work, we studied the bacterial and fungal endophytic communities of olive tree (
Olea europaea
L.) asymptomatic or low symptomatic genotypes sampled in groves heavily compromised by
Xylella fastidiosa
subsp.
pauca
, aiming to characterize microbiota in genotypes displaying differential response to the pathogen.
Results
The relationships between bacterial and fungal genera were analyzed both separately and together, in order to investigate the intricate correlations between the identified Operational Taxonomic Units (OTUs). Results suggested a dominant role of the fungal endophytic community compared to the bacterial one, and highlighted specific microbial taxa only associated with asymptomatic or low symptomatic genotypes. In addition, they indicated the occurrence of well-adapted genetic resources surviving after years of pathogen pressure in association with microorganisms such as
Burkholderia
,
Quambalaria
,
Phaffia
and
Rhodotorula
.
Conclusions
This is the first study to overview endophytic communities associated with several putatively resistant olive genotypes in areas under high
X. fastidiosa
inoculum pressure. Identifying these negatively correlated genera can offer valuable insights into the potential antagonistic microbial resources and their possible development as biocontrol agents.
Publisher
BioMed Central,BioMed Central Ltd,Springer Nature B.V,BMC
Subject
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