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. 2013 Nov 26;55(1):42–51. doi: 10.1093/pcp/pct154

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© The Author 2013. Published by Oxford University Press on behalf of Japanese Society of Plant Physiologists.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com

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Fig. 2 — Morphology of leaves. The oni3 mutant leaves were examined using paraffin sections. (A) A longitudinal section of the wild-type shoot apex at 1 week after germination. (B) A longitudinal section of the oni3-6 shoot apex showing a fusion of the P1 leaf primordium and SAM (red arrow) at 1 week after germination. (C) A cross-section of the wild-type shoot apex showing no fusion of leaves at 2 weeks after germination. (D) A cross-section of oni3-6 leaves showing fusions of P3 and P4 leaves (red arrow) at 2 weeks after germination. (E) A cross-section of the oni3-7 shoot apex showing a fusion of P4 leaf margins (black arrow) and fusions between P3 and P4 leaves (red arrows) at 2 weeks after germination. (F) A close-up view of a fusion site of two successive leaves of oni3-7 (red arrow). A close-up view of an inset is shown. (G) A close-up view of a fusion site of two successive leaves of oni3-7. The abaxial side of the midrib is fused with the adaxial surface of the preceding leaf (red arrow). A close-up view of an inset is shown. (H) A longitudinal section of a distal region of the oni3-6 shoot. Black arrows indicate fusions within the same leaf, and a red arrow indicates fusions between successive leaves. SAM, shoot apical meristem; P1, P1 leaf primordium; P3, P3 leaf primordium; P4, P4 leaf primordium. Bars = 100 µm.