Auteurs, date et publication :
Auteurs Romain Van Den Bogaert , Jérôme Labille , Sophie Cornu
Publication : Soil Science Society of America Journal
Date : 2025
Volume : 79
Issue : 1
Pages : 43-54
Catégorie(s)
#ACBB #ACBB Mons #INRAERésumé
Soil microorganisms are responsible for organic matter decomposition processes that regulate soil carbon storage and mineralisation to CO2. Climate change is predicted to increase the frequency of drought events, with uncertain consequences for soil microbial communities. In this study we tested the hypothesis that agricultural management used to enhance soil carbon stocks would increase the stability of microbial community structure and activity in response to water-stress. Soil was sampled from a long-term field trial with three soil carbon management systems and was used in a laboratory study of the effect of a dry–wet cycle on organic C mineralisation and microbial community structure. After a drying–rewetting event, soil microcosms were maintained wet and microbial community structure and abundance as well as microbial respiration were measured for four weeks. The results showed that the NO-TILL management system, with the highest soil organic matter content and respiration rate, had a distinct bacterial community structure relative to the conventional and the TILL without fertiliser systems. In all management systems, the rewetting event clearly modified microbial community structure and activity. Both returned to their pre-drought state after 28 days. However, the magnitude of variation of C mineralisation was lower (i.e. the resistance to stress was higher) in the NO-TILL system. The genetic structure of the NO-TILL bacterial communities was most modified by water-stress and exhibited a slower recovery rate. This suggests that land use management can increase microbial functional resistance to drought stress via the establishment of bacterial communities with particular metabolic capacities. Nevertheless, the resilience rates of C mineralisation were similar among management regimes, suggesting that similar mechanisms occur, maybe due to a common soil microbial community legacy.
Auteurs, date et publication :
Auteurs Aurore Kaisermann , Adélaïde Roguet , Naoise Nunan , Pierre-Alain Maron , Nicholas Ostle , Jean-Christophe Lata
Publication : Soil Biology and Biochemistry
Date : 2013
Volume : 66
Pages : 69-77
Catégorie(s)
#Genosol #INRAEAuteurs, date et publication :
Auteurs Marc Roucaute , Arnaud Auber , Thierry Caquet , Laurent Lagadic
Date : 2011
Catégorie(s)
#INRAE #PEARLAuteurs, date et publication :
Auteurs J. Côte , J.-M. Roussel , S. Le Cam , F. Guillaume , G. Evanno
Publication : Journal of Evolutionary Biology
Date : 2016
Volume : 29
Issue : 8
Pages : 1593-1601
Catégorie(s)
#INRAE #PEARLAuteurs, date et publication :
Auteurs Jonathan Derot , Hiroshi Yajima , Stéphan Jacquet
Publication : Harmful Algae
Date : 2025
Volume : 99
Pages : 101906
Catégorie(s)
#INRAE #OLAAuteurs, date et publication :
Auteurs Seindé Touré , Charlotte Nirma , Michael Falkowski , Isabelle Dusfour , Isabelle Boulogne , Arnaud Jahn-Oyac , Maïra Coke , Didier Azam , Romain Girod , Céline Moriou , Guillaume Odonne , Didier Stien , Emeline Houël , Véronique Eparvier
Publication : Journal of Natural Products
Date : 2017
Volume : 80
Issue : 2
Pages : 384-390
Catégorie(s)
#ANR-Citation #INRAE #PEARLAuteurs, date et publication :
Auteurs Roucaute M. , Salaün A. , T. Caquet , Lagadic L.
Date : 2012
Catégorie(s)
#INRAE #PEARLAuteurs, date et publication :
Auteurs Nicolas Delage , Laurent Beaulaton , Didier Azam
Date : 2025
Pages : 17
Catégorie(s)
#INRAE #PEARLAuteurs, date et publication :
Auteurs P. Hinsinger , A. Brauman , N. Devau , F. Gérard , C. Jourdan , J. P. Laclau , E. Le Cadre , B. Jaillard , C. Plassard
Publication : Plant Soil
Date : 2025
Volume : 348
Pages : 29-61
Catégorie(s)
#CIRAD #FORET Itatinga #INRAERésumé
Studies investigating viral ecology have mainly been conducted in temperate marine and freshwater habitats. Fewer reports are available on the often less accessible “extreme environments” such as hot springs. This study investigated prokaryoticand virus-like particles (VLP) associated to hot springs, themselves situated in cold environments of the Southern Hemisphere (i.e. in the French Southern and Antarctic Lands). This was performed by examining their abundance in hot springs and surrounding temperate seawater using both epifluorescence microscopy (EFM) and flow cytometry (FCM), which was applied for the first time to such ecosystems. On one hand, prokaryotic abundances of 4.0 × 105–2.2 × 106 cell mL−1 and 7.0 × 104–2.8 × 106 cell mL−1 were measured using EFM and FCM, respectively. The abundances of virus-like particles (VLP), on the other hand, ranged between 9.8 × 105 and 7.5 × 106 particles mL−1 when using EFM, and between 1.3 × 105 and 6.2 × 106 particles mL−1 when FCM was applied. A positive correlation was found between VLP and prokaryotic abundances, while the virus-to-prokaryote ratio was generally low and ranged between 0.1 and 6. In parallel, samples and culture supernatants were also visualised using transmission electron microscopy. For this, enrichment cultures were prepared using environmental samples. Both raw sample and enrichment culture—supernatants were analysed for the presence of VLPs. Observations revealed the presence of Caudovirales, membrane vesicles and possibly a new type of virion morphology, associated to members of the order Thermotogales, a thermophilic and anaerobic bacterium.
Auteurs, date et publication :
Auteurs Kaarle J. Parikka , Stéphan Jacquet , Jonathan Colombet , Damien Guillaume , Marc Le Romancer
Publication : Polar Biology
Date : 2025
Volume : 41
Issue : 7
Pages : 1335-1352