Sites of deposition of suberin & lignin

An electron microscopic view of an endodermis cell with Casparian strip from sea-lavender (Limonium sinuatum). The circled sites show the deposition of suberin which comprises a major component of the Casparian strip.

GS = intercellular space, N = nucleus, V = vacuole, Ct = cortex cell, Pc = pericycle cell, T = tonoplast

Illustration from: Ledbetter & Porter, 1970, Introduction to the Fine Structure of Plant Cells, Springer-Verlag