Structure and diversity of bacterial community in semiarid soils cultivated with prickly-pear cactus (Opuntia ficus-indica (L.) Mill.)

Abstract

Studies evaluating the structure and diversity of bacterial communities in arid environments including the rhizosphere of local and adapted plant species are important. Therefore, we used a sequencing of the 16S ribosomal RNA gene for describing the structure and diversity of soil bacterial community in three zones: Agreste, Transition and Sertão. The bacterial community was clustered in 9,838 OTUs in Agreste, 8,388 OTUs in the transition, and 14,849 OTUs for Sertão. Among the most abundant phyla, Proteobacteria and Acidobacteria were abundant in Agreste and Sertão, respectively, while Actinobacteria were abundant in Transition and Sertão. Specifi c taxa of Proteobacteria, in Agreste, and Actinobacteria, in Sertão, exhibited differences according to biotic and abiotic conditions. Thus, the structure and diversity of bacterial community were different in these areas and were infl uenced by environmental and soil conditions.

Mechanism of bare patch formation under Haloxylon ammodendron canopies and patch effects on soil microorganisms in the Gurbantunggut Desert, Northern China

“…al. 2010;Kopecky et al 2011), playing an important role in element cycles and litter decomposition of plants, helping to stabilize soil structure and improving the effectiveness of nutrients and minerals in soil(Solans et al 2022), which is particularly important for low-fertility soil(Lyra et al 2021). In this study, correlation analysis results showed that Actinobacteria were signi cantly negatively correlated with soil TN, and it is inferred that Actinobacteria may prefer oligotrophic environments.…”