https://nova.newcastle.edu.au/vital/access/ /manager/Index en-au 5 The impact of low molecular weight organic acids from plants with C3 and C4 photosystems on the rhizoremediation of polycyclic aromatic hydrocarbons contaminated soil https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:39560 Wed 27 Jul 2022 14:35:17 AEST ]]> Root exudates alter the expression of diverse metabolic, transport, regulatory, and stress response genes in rhizosphere pseudomonas https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:39628 Pseudomonas fluorescens group and Brachypodium distachyon, a model for economically important food, feed, forage, and biomass crops of the grass family. We collected and analyzed root exudates of B. distachyon and demonstrated the presence of multiple carbohydrates, amino acids, organic acids, and phenolic compounds. The subsequent screening of bacteria by Biolog Phenotype MicroArrays revealed that many of these metabolites provide carbon and energy for the Pseudomonas strains. RNA-seq profiling of bacterial cultures amended with root exudates revealed changes in the expression of genes encoding numerous catabolic and anabolic enzymes, transporters, transcriptional regulators, stress response, and conserved hypothetical proteins. Almost half of the differentially expressed genes mapped to the variable part of the strains' pangenome, reflecting the importance of the variable gene content in the adaptation of P. fluorescens to the rhizosphere lifestyle. Our results collectively reveal the diversity of cellular pathways and physiological responses underlying the establishment of mutualistic interactions between these beneficial rhizobacteria and their plant hosts.]]> Wed 10 Aug 2022 11:58:55 AEST ]]> Nanobiochar-rhizosphere interactions: Implications for the remediation of heavy-metal contaminated soils https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:47339 Fri 13 Jan 2023 12:16:30 AEDT ]]>