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(A and B) TEM micrographs illustrating median paradermal views of post-cytokinetic A. nidus stomata. (A) Control stoma. (B) Stoma affected by 25 µM CPA for 24 h, which lacks an “internal stomatal pore” (B; cf. A). ISP, internal stomatal pore; VW ventral wall. A: x1,900; (B: x2,300.)
