Changes in rice rhizosphere and bulk soil bacterial communities in the Doñana wetlands at different growth stages

• DOI: 10.1016/j.apsoil.2023.105013
• Publication Date: 2023-06-16T22:28:44Z
• Authors: Macarena Iniesta-...; Manuel Brenes-Álv...; Ana V. Lasa; Manuel Fernández-...; Consolación Álvarez; Fernando P. Molin...; Vicente Mariscal
• Keywords: Bulk soil

The Doñana wetlands comprise an emblematic Mediterranean landscape protected as a UNESCO World Heritage Site. Some parts of these have been transformed into intensive rice cultivation areas, which are currently the most productive rice-growing areas in Europe. We examined bacterial communities domesticated soils they key for plant health and productivity strong influence on biochemical cycles. To identify bacteria, we used metabarcoding analysis coupled with metabolic predictions co-occurrence networks. This was performed bulk rhizosphere during different stages growing season. These soil compartments had greater effect than phenological stages. diversity richness population inhabiting much lower that soil, comprising taxa were significantly more represented this compartment, such bacteria from genus Hydrogenophaga, three genera order Rhizobiales, unclassified families Desulfocapsaceae Actinobacteria. Rhizosphere networks revealed high number negative connections, indicating unstable may be highly influenced by biotic abiotic factors. mostly rely two belonging to phyla Proteobacteria Cyanobacteria, predicted network hubs compartment. conserved stable throughout growth period rice. Anaerobic Marmoricola, uncultured Gemmatimonadota SDR1034 terrestrial group, Anaerolinea, sulphur oxidizer, Thiobacillus represented. provides valuable information understanding cultivated region, is critical enhancing productivity.