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The distribution of differentially expressed transcription factors in apple fruit under different nitrogen levels. (A–D) The number of differentially expressed transcription factors in S1–2 vs. S1–0, S1–3 vs. S1–0, S2–2 vs. S2–0, and S2–3 vs. S2–0, respectively. (E) Venn diagram of differentially expressed transcription factors. (F) Heat map of differentially expressed transcription factors co-expressed in two periods.
