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. 2009 Jul 10;4(7):e6211. doi: 10.1371/journal.pone.0006211

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Harbison, Sehgal.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Yellow bars, w ¹¹¹⁸; Canton-S; red bars, Canton-S; purple bars, Oregon, and green bars, 22-2. P values given reflect the significance of the effect of day. Error bars represent the standard error of the mean.