Fig. 7From: Defined tetra-allelic gene disruption of the 4-coumarate:coenzyme A ligase 1 (Pv4CL1) gene by CRISPR/Cas9 in switchgrass results in lignin reduction and improved sugar releaseHistological staining for lignin deposition in control a, b, pv4cl1-25 c, d and pv4cl1-26 e, f. Second internode was sampled at R1 stage. Scale bars: 50 µm. Thickness of the cross section is 30 µmBack to article page