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Vein patterning in cotyledons. (a) normal structure with distal (d) and proximal (p) areoles closed; (b) aberrant structure, with only the distal areoles closed. ps = proximal secondary vein; ds = distal secondary vein; mv = middle vein. Ath Col-0 wt (n = 217 seedlings) had 27.6% (8.8% pairs) and AtStR1- mutant (n = 208 seedlings) had 42.3% (31.7% pairs) aberrant vein patterning, including the typical aberration shown in (b).
