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Plant-soil relationship is mediated by ectomycorrhizal fungal communities in trace element contaminated soils.

AuthorsGil Martínez, Marta ; López-García, A.; Navarro-Fernández, Carmen M. ; Kjøller, Rasmus; Tibbett, Mark; Domínguez, María Teresa ; Marañón, Teodoro
KeywordsFeedback processes
Holm oak,
Functional traits
Issue Date22-Mar-2018
PublisherAsociación Española de Ecología Terrestre
CitationII Simposio del Grupo de Trabajo “Interacciones Planta‐Suelo” Poster P4‐11, pág. 50 (2008)
AbstractEctomycorrhizal (ECM) fungi might play a major role in host plant establishment in polluted soils, by increasing plant nutrient supply and providing protection against pollutants. Therefore, ECM fungal communities generate functional consequences in tree performance but it is still unknown the effect of fungal functional traits on tree fitness. In order to understand the importance of ECM fungal functional traits in this framework, we conducted a study in the Guadiamar Green Corridor, in SW Spain. This corridor is characterised by a gradient of trace elements contaminating the soil from north to south caused by a spill of mine tailings 20 years ago. Four contrasting areas along this gradient were selected and patterns of colonisation and morphological traits of ECM root tips (emanating hyphae, rhizomorphs and melanisation) were characterised on the host holm oak (Quercus ilex subsp. ballota). Our results showed that there was a high ECM fungal species and functional traits (resource acquisition and trace element binding) variability along the contamination gradient. ECM functional traits were affected at community level by trace element contamination as both emanating hyphae and rhizomorphs were negatively associated with some trace elements (López‐García et al., 2018). We hypothesised that the reduction of external mycelia would lead to an indirect negative effect on the nutrition of the host trees. Therefore, we analysed the holm oak status in terms of leaf and root nutrition and trace element accumulation. Regression analyses showed a relationship between ECM species composition and P leaf nutrition. Trace elements translocation from soil to tree compartments was associated with ECM traits with a resource acquisition function. Prolific emanating hyphae production was positively correlated to a high leaf accumulation of trace elements (As, Cu, Zn). In conclusion, ECM fungal communities and their associated functional traits had an important effect on holm oak status and showed a mediation role in the soil‐plant feedback in trace element contaminated soils. Referencias: A López‐García, M Gil‐Martínez, CM Navarro‐Fernández, R Kjøller, C Azcón‐Aguilar, MT Domínguez, T Marañón (2018).Functional diversity of ectomycorrhizal fungal communities is reduced by trace element contamination. Soil Biology and Biochemistry 121 (2018) 202–211 DOI 10.1016/j.soilbio.2018.03.021
DescriptionComunicación presentada en el II Simposio sobre Interacciones Planta-Suelo, Grupo de Trabajo PlantSoil (AEET), que tuvo lugar del 22 a 25 de marzo 2018, en Antequera (Málaga)
Appears in Collections:(IRNAS) Comunicaciones congresos
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