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. 2016 Apr 26;11(4):e0154212. doi: 10.1371/journal.pone.0154212

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© 2016 Bu et al

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 credited.

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Fig 3 — The average pairwise variations V_n/V_n+1 was analyzed between the normalization factors NF_n and NF_n+1 to indicate the optimal number of reference genes required for RT-qPCR data normalization in different samples. T/O: Different tissue/organs, D: Dark conditions, P: Phytoplasma infection, FRS: Fruit ripening stages.