Fig. 7

Abundance of TEs-siRNAs (siRNAs associated with transposable elements) in 02428-4x and 02428-2x during pollen and embryo sac development. (a) 24 nt TEs-siRNAs in class I (retrotransposons). (b) 24 nt TEs-siRNAs in class II (transposon). PMA, MA, SCP and BCP represent pre-meiotic interphase, meiosis and single microspore stage and bi-cellular pollen stage, respectively. MF, MM, FMF and EES represent megasporocyte formation stage, megasporocyte meiosis stage, functional megaspore formation stage and eight-nucleate embryo sac developing-stage. P-4x and P-2x indicate autotetraploid and diploid pollen development, respectively. E-4x and E-2x indicate autotetraploid and diploid embryo sac development, respectively