Mycorrhizal inoculation effects on growth and the mycobiome of poplar on two phytomanaged sites after 7-year-short rotation coppicing

• DOI: 10.3389/fpls.2022.993301
• Publication Date: 2022-10-28T08:53:18Z
• Authors: Lisa Ciadamidaro; Stéphane Pfendler; Olivier Girardclos; Cyril Zappelini; Philippe Binet; Valerie Bert; Damase Khasa; Damien Blaudez; Michel Chalot
• Keywords: Short rotation forestry; Short rotation coppice

Afforestation of trace-element contaminated soils, notably with fast growing trees, has been demonstrated to be an attractive option for bioremediation due the lower costs and dispersion contaminants than conventional cleanup methods. Mycorrhizal fungi form symbiotic associations plants, contributing their tolerance towards toxic elements actively participating biorestoration processes. The aim this study was deepen our understanding on effects mycorrhizal inoculation plant development fungal community at two sites (Pierrelaye Fresnes-sur-Escaut, France) planted poplar (Populus trichocarpa x Populus maximowiczii). 2 were divided into 4 replicated field blocks a final density 2200 tree h-1. Half trees inoculated commercial inoculum made mix species. presented different physico-chemical characteristics (e.g., texture: sandy soil versus silty-loam organic matter: 5.7% 3.4% Pierrelaye respectively) various trace element contamination levels. After 7 years plantation, showed significant positive effect biomass production sites. Fungal composition predominance phylum Ascomycota both sites, dominance Geopora Arenicola Mortierella elongata, higher proportion ectomycorrhizal endophytic (with highest values observed in Fresnes-sur-Escaut: 45% 28% ECM fungi, respectively), well known capacity have stressful conditions. Furthermore, site frequency (%) tips (ECM) intensity root cortex colonization arbuscular (AMF) Fresnes-sur-Escaut site, which translates level diversity. Finally, that biofertilization approach could recommended as appropriate phytomanagement strategy, its significantly improve productivity without any perturbations mycobiomes.