Fig. 1. tan1 vascular pattern. Cleared leaf sections of (A) wild-type and (B) tan1, showing the alteration in vascular pattern in the tan1 mutant. Paradermal leaf sections of (C) wild-type and (D) tan1 in Spurr’s resin illustrating the irregular arrangement of BS cell clusters around a minor vein in the tan1 mutant. Arrows point to BS cells in wild-type (C) and ectopic BS cell clusters in the tan1 mutant (D). Bar, 10 µm (C,D).

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