AUTHOR=Bakshi Madhunita , Sherameti Irena , Meichsner Doreen , Thürich Johannes , Varma Ajit , Johri Atul K. , Yeh Kai-Wun , Oelmüller Ralf 

TITLE=Piriformospora indica Reprograms Gene Expression in Arabidopsis Phosphate Metabolism Mutants But Does Not Compensate for Phosphate Limitation

JOURNAL=Frontiers in Microbiology

VOLUME=8

YEAR=2017

URL=https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2017.01262

DOI=10.3389/fmicb.2017.01262

ISSN=1664-302X

ABSTRACT=<p><italic>Piriformospora indica</italic> is an endophytic fungus of Sebacinaceae which colonizes the roots of many plant species and confers benefits to the hosts. We demonstrate that approximately 75% of the genes, which respond to <italic>P. indica</italic> in Arabidopsis roots, differ among seedlings grown on normal phosphate (Pi) or Pi limitation conditions, and among wild-type and the <italic>wrky6</italic> mutant impaired in the regulation of the Pi metabolism. Mapman analyses suggest that the fungus activates different signaling, transport, metabolic and developmental programs in the roots of wild-type and <italic>wrky6</italic> seedlings under normal and low Pi conditions. Under low Pi, <italic>P. indica</italic> promotes growth and Pi uptake of wild-type seedlings, and the stimulatory effects are identical for mutants impaired in the PHOSPHATE TRANSPORTERS1;1, -1;2 and -1;4. The data suggest that the fungus does not stimulate Pi uptake, but adapts the expression profiles to Pi limitation in Pi metabolism mutants.</p>