plant surface microbiology.pdf

29 Functional Genomic Approaches for Studies of Mycorrhizal Symbiosis 589
Fig. 7. Histogram showing
clustering of genes from
macroarray analysis based
on levels of expression. The
interaction (72 h)-related
expression is shown on the
x-axis and the number of
genes that are upregulated
at a given expression ratio
is shown on the y-axis.Only
genes that are upregulated
are shown from the
macroarray in Fig. 6A. For
identification of some of
the genes upregulated by
interaction see Table 2
Fig. 8. Scatter plot analysis of interaction-specific genes between free-living Laccaria
bicolor and L. bicolor interacted 72 h with Pinus resinosa seedling roots. For each gene,
transcript levels were calculated for the free-living mycelium and the mycelium that
interacted with red pine seedling root signals. Solid lines indicate an expression level of
onefold or above the free-living mycelium, dashed lines 2.5–6-fold increase and dotted
line eightfold or higher levels of expression. Only nonredundant clones are represented
in the plot. Selected clones that showed significant differential expression are highlighted