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. 2017 Sep 6;9(10):2604–2614. doi: 10.1093/gbe/evx177

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© The Author(s) 2017. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), 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. 4. — —Chlorophyll content of three laurels and comparison of nucleotide substitution rates between plastid house-keeping (HK) and photosynthetic (PS) genes across the 20 basal angiosperms. (a) Estimated chlorophyll content in fresh leaves of Cryptocarya chinensis and Cinnamomum camphora and in green and brown tissues of Cassytha filiformis. Red asterisks indicate significantly lower content in Cas. filiformis than in Cry. chinensis and Cin. camphora (P < 0.001, Student’s t-test). Regression analysis of HK versus PS genes for d_N (b) and d_S (c), respectively. (d) Comparison of the d_N/d_S values between HK and PS genes. The dashed line indicates that HK and PS genes have the same d_N/d_S values. Cas, Cas. filiformis; Cry, Cry. chinensis; Cin, Cin. camphora.