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@article{Field:2012:10.1038/ncomms1831,
author = {Field, KJ and Cameron, DD and Leake, JR and Tille, S and Bidartondo, MI and Beerling, DJ},
doi = {10.1038/ncomms1831},
journal = {Nature Communications},
title = {Contrasting arbuscular mycorrhizal responses of vascular and non-vascular plants to a simulated Palaeozoic CO(2) decline.},
url = {http://dx.doi.org/10.1038/ncomms1831},
volume = {3},
year = {2012}
}
TY - JOUR
AB - The arbuscular mycorrhizal (AM) fungal symbiosis is widely hypothesized to have promoted the evolution of land plants from rootless gametophytes to rooted sporophytes during the mid-Palaeozoic (480-360 Myr, ago), at a time coincident with a 90% fall in the atmospheric CO(2) concentration ([CO(2)](a)). Here we show using standardized dual isotopic tracers ((14)C and (33)P) that AM symbiosis efficiency (defined as plant P gain per unit of C invested into fungi) of liverwort gametophytes declines, but increases in the sporophytes of vascular plants (ferns and angiosperms), at 440 p.p.m. compared with 1,500 p.p.m. [CO(2)](a). These contrasting responses are associated with larger AM hyphal networks, and structural advances in vascular plant water-conducting systems, promoting P transport that enhances AM efficiency at 440 p.p.m. [CO(2)](a). Our results suggest that non-vascular land plants not only faced intense competition for light, as vascular land floras grew taller in the Palaeozoic, but also markedly reduced efficiency and total capture of P as [CO(2)](a) fell.
AU - Field,KJ
AU - Cameron,DD
AU - Leake,JR
AU - Tille,S
AU - Bidartondo,MI
AU - Beerling,DJ
DO - 10.1038/ncomms1831
PY - 2012///
TI - Contrasting arbuscular mycorrhizal responses of vascular and non-vascular plants to a simulated Palaeozoic CO(2) decline.
T2 - Nature Communications
UR - http://dx.doi.org/10.1038/ncomms1831
VL - 3
ER -
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