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(A, B, C) Examples of patterns seen in the number of CMX vessels in the top region of tap root of the RAD4 genotype (four doses of 1RS chromosome arm). (B) is labelled with arrowheads, inner xylem vessels; C, cortex; CMX, central metaxylem vessel; E, endodermis; PX, protoxylem; Scale bar, 100 μm.
