Effect of PHB production on starch, sucrose and glucose content in sugarcane and switchgrass leaves. Values are presented as a percentage of leaf dry weight. Error bars show standard deviation (n = 4). Left panels, sugarcane; Right panels, switchgrass. WT, wild type; LP, low PHB producer (≤1% DW); MP, medium producer (>1%, ≤2% DW); HP, high producer (>2% DW). Significant differences are indicated: **P < 0.001; *P < 0.05.