Root length, biomass, tissue chemistry and mycorrhizal colonization following 14 years of CO2 enrichment and 6 years of N fertilization in a warm temperate forest

Root systems serve important roles in carbon (C) storage and resource acquisition required for the increased photosynthesis expected in CO2-enriched atmospheres. For these reasons, understanding the changes in size, distribution and tissue chemistry of roots is central to predicting the ability of f...

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Bibliographic Details
Published in:Tree physiology 2014-09, Vol.34 (9), p.955-965
Main Authors: Taylor, Benton N, Strand, Allan E, Cooper, Emily R, Beidler, Katilyn V, Schönholz, Marcos, Pritchard, Seth G
Format: Article
Language:English
Subjects:
Biomass
Carbon Dioxide - pharmacology
Forests
Mycorrhizae - physiology
Nitrogen - pharmacology
North Carolina
Plant Roots - chemistry
Plant Roots - growth & development
Plant Roots - microbiology
Seasons
Soil - chemistry
Soil Microbiology
Trees - drug effects
Trees - growth & development
Trees - microbiology
Trees - physiology
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Summary:Root systems serve important roles in carbon (C) storage and resource acquisition required for the increased photosynthesis expected in CO2-enriched atmospheres. For these reasons, understanding the changes in size, distribution and tissue chemistry of roots is central to predicting the ability of forests to capture anthropogenic CO2. We sampled 8000 cm(3) soil monoliths in a pine forest exposed to 14 years of free-air-CO2-enrichment and 6 years of nitrogen (N) fertilization to determine changes in root length, biomass, tissue C : N and mycorrhizal colonization. CO2 fumigation led to greater root length (98%) in unfertilized plots, but root biomass increases under elevated CO2 were only found for roots
ISSN:0829-318X
1758-4469
DOI:10.1093/treephys/tpu058