RT Journal Article
SR Electronic
T1 Phosphorus acquisition efficiency in arbuscular mycorrhizal maize is correlated with the abundance of root-external hyphae and the accumulation of transcripts encoding PHT1 phosphate transporters
JF bioRxiv
FD Cold Spring Harbor Laboratory
SP 042028
DO 10.1101/042028
A1 Ruairidh J. H. Sawers
A1 Simon F. Svane
A1 Clement Quan
A1 Mette Grønlund
A1 Barbara Wozniak
A1 Eliécer González-Muñoz
A1 Ricardo A. Chávez Montes
A1 Ivan Baxter
A1 Jerome Goudet
A1 Iver Jakobsen
A1 Uta Paszkowski
YR 2016
UL http://biorxiv.org/content/early/2016/10/24/042028.abstract
AB Plant interactions with arbuscular mycorrhizal fungi have long attracted interest for their potential to promote more efficient use of mineral resources in agriculture. Their widespread use, however, remains limited by understanding of the processes that determine the outcome of the symbiosis. In this study, variation in growth response to mycorrhizal inoculation was characterized in a panel of diverse maize lines.A panel of thirty maize lines was evaluated with and without inoculation with arbuscular mycorrhizal fungi. The line Oh43 was identified to show superior response and, along with five other reference lines, was characterized in greater detail in a split-compartment system, using 33P to quantify mycorrhizal phosphorus uptake.Changes in relative growth between non-inoculated and inoculated plants indicated variation in host capacity to profit from the symbiosis. Shoot phosphate content, abundance of intra-radical and root-external fungal structures, mycorrhizal phosphorus uptake, and accumulation of transcripts encoding plant PHT1 family phosphate transporters varied among lines.Larger growth responses in Oh43 were correlated with extensive development of root-external hyphae, accumulation of specific Pht1 transcripts and a high level of mycorrhizal phosphorus uptake. The data indicate that host genetic factors influence fungal growth strategy with an impact on plant performance.