Fig. 2

Microscopic longitudinal sections of internodes of bioenergy sorghum inbred R.07020 at 60 DAP (days after planting). Internode1 (Int1) is the youngest sub-apical internode, and internode 4 (Int4) is the oldest fully expanded internode. Stem sections were stained with safranin and alcian blue. Samples were from the middle section of each internode