Figure 2.

csi1 has no defects associated with secondary cell wall biosynthesis. Cross sections of stems showing vascular bundles in wild type (A) and csi1-3 mutant plants (B). Stem sections were stained with toluidine blue. Bar = 50 µM. (C) Cellulose content in stems from wild type and mutant plants. Cell wall materials were collected at the late stage of stem development. Standard error bars are shown (n = 4).