Université de Neuchâtel

Spatio-temporal dynamics of bacterial communities associated with two plant species differing in organic acid secretion: A one-year microcosm study on lupin and wheat

Weisskopf, Laure ; Le Bayon, Renée-Claire ; Kohler, Florian ; Page, Valérie ; Jossi, Maryline ; Gobat, Jean-Michel ; Martinoia, Enrico ; Aragno, Michel

In: Soil Biology and Biochemistry, 2008, vol. 40, no. 7, p. 1772-1780

Plants are generally assumed to influence the surrounding soil microflora through rhizodeposition. However, the role of rhizodeposits, and especially organic acids, in structuring the bacterial communities is still poorly understood. In this study, we asked the question whether plants differing in organic acid secretion have a different impact on the soil bacterial communities, and if this is the...

Université de Neuchâtel

Rhizosphere bacterial communities associated with Lolium perenne : structuration and plant-mediated influences

Jossi, Maryline ; Aragno, Michel (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2008 ; Th.2024.

Due to their presence, activity and physiology, plant roots influence physically, chemically and biologically their surrounding soil. Some microorganisms will be favoured, or on the contrary inhibited by roots. As the junction between soil and plant, the rhizosphere presents an intense activity because of the stimulation of microflora by rhizodeposition and of the existence of various...

Université de Neuchâtel

How elevated pCO2 modifies total and metabolically active bacterial communities in the rhizosphere of two perennial grasses grown under field conditions

Jossi, Maryline ; Fromin, Nathalie ; Tarnawski, Sonia ; Kohler, Florian ; Gillet, François ; Aragno, Michel ; Hamelin, Jérôme

In: FEMS Microbiology Ecology, 2006, vol. 55, no. 3, p. 339-350

The response of total (DNA-based analysis) and active (RNA-based analysis) bacterial communities to a pCO2 increase under field conditions was assessed using two perennial grasses: the nitrophilic Lolium perenne and the oligonitrophilic Molinia coerulea. PCR- and reverse transcriptase-PCR denaturing gradient gel electrophoresis analysis of 16S rRNA genes generated...