Carbon and nitrogen concentrations in grass roots.

<p>(A–B) Carbon (C), (C–D) nitrogen (N) concentrations and (E–F) C∶N ratio in roots of C₃ (<i>Microlaena stipoides</i>) and C₄ (<i>Cymbopogon refractus</i>) grass species with (closed bars) and without (open bars) larval feeding. Mean ± S.E. shown, N = 15. Lowercase superscripts indicate significant differences between treatments.