Publications by authors named "Anne-Laure Pablo"
Despite the strong ecological importance of ectomycorrhizal (ECM) fungi, their vertical distribution remains poorly understood. To our knowledge, ECM structures associated with trees have never been reported in depths below 2 meters. In this study, fine roots and ECM root tips were sampled down to 4-m depth during the digging of two independent pits differing by their water availability.
View Article and Find Full Text PDFRoot exudation contributes to soil carbon allocation and also to microbial C and energy supply, which subsequently impacts soil aggregation around roots. Biologically-driven soil structural formation is an important driver of soil fertility. Plant genetic determinants of exudation and more generally of factors promoting rhizosphere soil aggregation are largely unknown.
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- This study explores how plant roots affect the movement of bacterivorous nematodes in soil, which is essential for their ability to access new regions with bacteria.
- Using a unique microcosm design that mimics soil environments, the researchers found that artificial roots made from PVC helped nematodes migrate more effectively through finer soil textures.
- The results indicate that plant roots may significantly enhance nematode dispersion, especially in compacted or fine-textured soils.
In the tropics, termites are major players in the mineralization of organic matter leading to the production of greenhouse gases including nitrous oxide (N2O). Termites have a wide trophic diversity and their N-metabolism depends on the feeding guild. This study assessed the extent to which N2O emission levels were determined by termite feeding guild and tested the hypothesis that termite species feeding on a diet rich in N emit higher levels of N2O than those feeding on a diet low in N.
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- Priming effect (PE) enhances the mineralization of soil organic matter (SOM) when fresh organic matter is added, impacting agricultural soil management, particularly in tropical regions.
- Earthworms, particularly endogeic species like Pontoscolex corethrurus, play a significant role in this process by processing soil and introducing microorganisms that can stimulate SOM dynamics.
- A study conducted in Madagascar demonstrated that earthworms can increase PE intensity in tropical soils, specifically by stimulating bacterial groups from the Bacteroidetes phylum, which enhances the breakdown of organic residues like wheat straw.