FIGURE 7.

Quantification of development of Rhizophagus irregularis in mycorrhiza-inoculated (RI) and in the non-mycorrhizal control (NM) pots amended with isotopically labeled chitin in Experiment 2, and incubated either in the glasshouse or outdoors, as per broadly specific arbuscular mycorrhizal (AM) fungal primers NS31-AML2 targeting small ribosomal subunit (SSU) in roots (A) or Rhizophagus-specific primers with a hydrolysis probe targeting large ribosomal subunit (LSU) of R. irregularis in roots (B) and in substrate samples amended with chitin (C). Results were corrected for internal DNA standard recovery upon DNA extraction from the different samples. Mean values (n = 4) are shown, error bars indicate +1 standard error of mean.