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Effect of organic and conventional farming on soil bacterial diversity of pecan tree ( Carya illinoensis K. Kosh) orchard across two phenological stages

Abstract : We described the bacterial diversity of walnut grove soils under organic and conventional farming. The bacterial communities of rhizospheric and non‐rhizospheric soils of pecan tree (Carya illinoensis K. Koch) were compared considering two phenological stages (sprouting and ripening). Sixteen OTUs were identified significantly more abundant according to the plant development, only one according to the farming condition, and none according to the soil origin. The OTUs specificaly abundant according to plant development included Actinobateria (2) and Betaproteobacteria (1) related OTUs more abundant at the sprouting stage, while at the fruit ripening stage the more abundant OTUs were related to Actinobacteria (6), Alphaproteobacteria (6), and unclassified Bacteria (1). The Gaiellaceae OTU18 (Actinobacteria) was more abundant under conventional farming. Thus, our study revealed that the plant development stage was the main factor shaping the bacterial community structure, while less influence was noticed for the farming condition. The bacterial communities exhibited specific metabolic capacities, a large range of carbon sources being used at the fruit ripening stage. The identified OTUs specifically more abundant represent indicators providing useful information on soil condition, potential tools for the management of soil bacterial communities.
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https://hal-univ-pau.archives-ouvertes.fr/hal-03126884
Contributor : Sylvie Blanc <>
Submitted on : Monday, February 1, 2021 - 10:30:11 AM
Last modification on : Tuesday, February 2, 2021 - 2:58:06 PM

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Luz Elena Palma‐cano, Hilda Piñon‐castillo, Socorro Tarango‐rivero, Anne Carbon, Joan Salas‐leiva, et al.. Effect of organic and conventional farming on soil bacterial diversity of pecan tree ( Carya illinoensis K. Kosh) orchard across two phenological stages. Letters in Applied Microbiology, Wiley, In press, ⟨10.1111/lam.13452⟩. ⟨hal-03126884⟩

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