Effect of photoperiod on gene expression in Nicotiana tabacum MM. A) Volcano plot of log2 transformed expression ratios (LD/SD) plotted against the negative log10-transformed p-value from a one-sample t-test. Shaded areas highlight the genes showing a statistically significant difference in gene expression of at least two fold. The numbers indicate the genes present in the shaded area. B) Percentage distribution of functional categories corresponding to genes whose expression decreased in plants transferred from LD to SD conditions. C) Percentage distribution of functional categories corresponding to genes whose expression increased in plants transferred from LD to SD.
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