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Relationships between Δmalate and (A) δ13C values, (B) leaf thickness and (C) FW/DW ratio in leaves of C. ensifolium, C. bicolor subsp. pubescens, and their F1 hybrids. Arrows show values of hybrid 3. The dashed line in (C) is a regression line with a non-significant P value (0.05 < P < 0.1).
