Time-course analysis of
pathogenesis-related (PR) gene expression by
quantitative reverse transcriptase-polymerase
chain reaction (qRT-PCR) in roots (A) and
shoots (B) of wild-type Arabidopsis plants at
0, 5, 9 and 14 days post-infection (dpi) with
the beet-cyst nematode, Heterodera schachtii.
The presented data are the mean fold changes
standard errors in PR transcript levels
relative to uninfected control tissue (baseline
set at 1.0) from three biological replicates. An
asterisk (*) indicates that the mean fold
change is significantly different from 1.0 as
determined by t-test (P < 0.05).