Aridity negatively affects the diversity and abundance of edaphic microbial communities and their multiple ecosystem services, ultimately impacting vegetation productivity and biotic interactions. Investigation about how plant-associated microbial communities respond to increasing aridity is of particular importance, especially in light of the global climate change predictions. To assess the effect of aridity on plant associated bacterial communities, we investigated the diversity and co-occurrence of bacteria associated with the bulk soil and the root system of olive trees cultivated in orchards located in higher, middle and lower arid regions of Tunisia. The results indicated that the selective process mediated by the plant root system is amplified with the increment of aridity, defining distinct bacterial communities, dominated by aridity-winner and aridity-loser bacteria negatively and positively correlated with increasing annual rainfall, respectively. Aridity regulated also the co-occurrence interactions among bacteria by determining specific modules enriched with one of the two categories (aridity-winners or aridity-losers), which included bacteria with multiple PGP functions against aridity. Our findings provide new insights into the process of bacterial assembly and interactions with the host plant in response to aridity, contributing to understand how the increasing aridity predicted by climate changes may affect the resilience of the plant holobiont.

Aridity modulates belowground bacterial community dynamics in olive tree / R. Marasco, M. Fusi, E. Rolli, B. Ettoumi, F. Tambone, S. Borin, H.I. Ouzari, A. Boudabous, C. Sorlini, A. Cherif, F. Adani, D. Daffonchio. - In: ENVIRONMENTAL MICROBIOLOGY. - ISSN 1462-2920. - 23:10(2021 Oct), pp. 6275-6291. [10.1111/1462-2920.15764]

Aridity modulates belowground bacterial community dynamics in olive tree

E. Rolli;F. Tambone;S. Borin;C. Sorlini;F. Adani
Penultimo
;
2021-10

Abstract

Aridity negatively affects the diversity and abundance of edaphic microbial communities and their multiple ecosystem services, ultimately impacting vegetation productivity and biotic interactions. Investigation about how plant-associated microbial communities respond to increasing aridity is of particular importance, especially in light of the global climate change predictions. To assess the effect of aridity on plant associated bacterial communities, we investigated the diversity and co-occurrence of bacteria associated with the bulk soil and the root system of olive trees cultivated in orchards located in higher, middle and lower arid regions of Tunisia. The results indicated that the selective process mediated by the plant root system is amplified with the increment of aridity, defining distinct bacterial communities, dominated by aridity-winner and aridity-loser bacteria negatively and positively correlated with increasing annual rainfall, respectively. Aridity regulated also the co-occurrence interactions among bacteria by determining specific modules enriched with one of the two categories (aridity-winners or aridity-losers), which included bacteria with multiple PGP functions against aridity. Our findings provide new insights into the process of bacterial assembly and interactions with the host plant in response to aridity, contributing to understand how the increasing aridity predicted by climate changes may affect the resilience of the plant holobiont.
Settore AGR/16 - Microbiologia Agraria
H20MCITNIF19SBORI_01 - BioSensing and rhizospherE – eNdosphere geochemical microprofiling of polychlorinated byphenils degradation by Soil microbiota upon stimulation of root Exudates (SENSE) - BORIN, SARA - H20MCITNIF - Horizon 2020_Marie Skłodowska-Curie actions-Innovative Training Network (ITN)/Individual Fellowships (IF) - 2019
7-set-2021
https://sfamjournals.onlinelibrary.wiley.com/doi/full/10.1111/1462-2920.15764
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/878610
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