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TitleEpiphytic and endophytic bacteria on olive tree phyllosphere: Exploring tissue and cultivar effect
Author(s)Mina, Diogo
Pereira, Jose Alberto
Lino-Neto, T.
Baptista, Paula
KeywordsOlea europaeaL
Organ specificity
Host specificity
Issue date2020
JournalMicrobial Ecology
CitationMina, D., Pereira, J.A., Lino-Neto, T. et al. Epiphytic and Endophytic Bacteria on Olive Tree Phyllosphere: Exploring Tissue and Cultivar Effect. Microb Ecol 80, 145–157 (2020).
Abstract(s)Variation on bacterial communities living in the phyllosphere as epiphytes and endophytes has been attributed to plant host effects. However, there is contradictory or inconclusive evidence regarding the effect of plant genetics (below the species' level) and of plant tissue type on phyllosphere bacterial community assembly, in particular when epiphytes and endophytes are considered simultaneously. Here, both surface and internal bacterial communities of two olive (Olea europaea) cultivars were evaluated in twigs and leaves by molecular identification of cultivable isolates, with an attempt to answer these questions. Overall,Proteobacteria,ActinobacteriaandFirmicuteswere the dominant phyla, being epiphytes more diverse and abundant than endophytes. Host genotype (at cultivar level) had a structuring effect on the composition of bacterial communities and, in a similar way, for both epiphytes and endophytes. Plant organ (leaf vs. twig) control of the bacterial communities was less evident when compared with plant genotype and with a greater influence on epiphytic than on endophytic community structure. Each olive genotype/plant organ was apparently selective towards specific bacterial operational taxonomic units (OTUs), which may lead to specific feedbacks on fitness of plant genotypes. Bacterial recruitment was observed to happen mainly within epiphytes than in endophytes and in leaves as compared with twigs. Such host specificity suggested that the benefits derived from the plant-bacteria interaction should be considered at genetic levels below the species.
Publisher version
AccessOpen access
Appears in Collections:CBFP - Artigos/Papers

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