ANOVA and correlation analyses for quantified traits in stem and root.

1* indicates significance at α≤0.05; ** at α≤0.01; the “−” following the “*” indicates less than expected number at corresponding significant level; “+” following the “*” indicates more abundant than expected number at corresponding significant level. Correlation groups were designated according to analyses in Figure 1.
2“Nonspecific” indicates that the pyrolysis breakdown product could not be definitively characterized and/or may be the result of a combination of multiple breakdown products.