Figure 3.

The pea aphid on chemically defined diets. (a) Mean RGR of two- to seven-day-old aphids on the standard diet containing all protein amino acids (S) and diets from which one essential amino acid was deleted (Fo, Io, etc). ANOVA: diet: F₁₀₃₈₆=5.20, 0.01>p>0.001; antibiotic treatment: F₁₃₈₆=1219, p<0.001; interaction: F₁₀₃₈₆=2.77, 0.01>p>0.001. The error terms are not shown for clarity and are provided in electronic supplementary material 3. (Fo, phenylalanine; Io, isoleucine; Ko, lysine; Lo, leucine; Mo, methionine; Ro, arginine; To, threonine; Vo, valine; Wo, tryptophan). (b) Contribution of Buchnera-derived amino acids to the protein growth of the aphids (abbreviations for amino acids are provided in the legend to figure 1).