Fungal Symbionts Enhance N-Uptake for Antarctic Plants Even in Non-N Limited Soils

Frontiers in Microbiology
Ian S Acuña-RodríguezMarco A Molina-Montenegro

Abstract

Plant-fungi interactions have been identified as fundamental drivers of the plant host performance, particularly in cold environments where organic matter degradation rates are slow, precisely for the capacity of the fungal symbiont to enhance the availability of labile nitrogen (N) in the plant rhizosphere. Nevertheless, these positive effects appear to be modulated by the composition and amount of the N pool in the soil, being greater when plant hosts are growing where N is scarce as is the case of Antarctic soils. Nevertheless, in some coastal areas of this continent, seabirds and marine mammal colonies exert, through their accumulated feces and urine a strong influence on the edaphic N content surrounding their aggregation points. To evaluate if the fungal symbionts (root endophytes), associated to the only two Antarctic vascular plants Colobanthus quitensis and Deschampsia antarctica, act as N-uptake enhancers, even in such N-rich conditions as those found around animal influence, we assessed, under controlled conditions, the process of N mineralization in soil by the accumulation of NH4+ in the rizhosphere and the biomass accumulation of plants with (E+) and without (E-) fungal symbionts. Complementarily, taking advantage...Continue Reading

References

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Apr 14, 2020·Ecology Letters·Ian S Acuña-RodríguezMarco A Molina-Montenegro
Oct 1, 1997·The New Phytologist·Peter Högberg

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Citations

Jun 1, 2021·Frontiers in Bioengineering and Biotechnology·Qingbin WangMin Zhang

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Datasets Mentioned

BETA
KJ881371
KJ881370

Software Mentioned

GAMM
R
mgcv R - package
R Language and Statistical Environment

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