Table 1.

The ectomycorrhizal infection of lateral roots of pin oak (Quercus palustris) seedlings grown in either acidic or alkaline medium and inoculated with live or autoclaved soil from 3 different sites.

Soil pH1Site2Autoclaved inoculum% lateral root infection
AcidicForestNo77.7 ab3
AcidicChloroticNo88.9 ab
AcidicNon-chloroticNo87.2 ab
AcidicForestYes0.0 c
AcidicChloroticYes0.0 c
AcidicNon-chloroticYes1.7c
AlkalineForestNo77.3 ab
AlkalineChloroticNo71.4 b
AlkalineNon-chloroticNo96.6 a
AlkalineForestYes0.0 c
AlkalineChloroticYes0.0 c
AlkalineNon-chloroticYes0.0 c
ANALYSIS OF VARIANCE
Model0.00014
Ph0.7367
Site0.4220
Inoculation0.0001
pH*Site0.5778
pH*lnoculation0.8215
Site*lnoculation0.5073
pH*Site*lnoculation0.5066
  • 1 Acidic soil pH = 5.5 and alkaline soil pH = 7.5.

  • 2 Soil inoculum from pin oak forest stand, urban chlorotic pin oak trees, and urban non-chlorotic pin oak trees.

  • 3 Means (n = 36) in the same column with a different letter are significantly different at the α = 0.05 level using a Fisher’s protected LSD.

  • 4 Significance probabilities from the F statistic from an ANOVA. Significant values (P ≤ 0.05) in bold.