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. 2018 Aug 17;13(8):e0202519. doi: 10.1371/journal.pone.0202519

Fig 1. Callus formation on Populus leaf disc explants after 30 days on a callus induction medium.

Fig 1

(A) 12 replicate leaf disk explants with callus along the midrib, (B) 12 replicate leaf disk explants with callus across the explant, (C) 12 replicate leaf disk explants with callus along the cut margin, (D) white friable callus along the midrib, (E) light green compact callus, and (F) green friable callus.