abnormal chromatin silencing increased chromatin silencing Chromatin silencing phenotypes may reflect the assembly or maintenance of heterochromatin or CENP-A-containing chromatin. See the GO cellular component terms 'heterochromatin' (GO:0000792) and 'CENP-A containing chromatin' (GO:0061638), and the biological process terms 'heterochromatin organization' (GO:0070828) and 'CENP-A containing chromatin organization' (GO:0061641). increased chromatin silencing during mitotic cell cycle midori increased chromatin silencing during vegetative growth 2015-04-02T15:08:22Z FYPO:0004540 A transcription regulation phenotype observed in the vegetative growth phase of the life cycle in which chromatin silencing is increased. Chromatin silencing is the observed effect of processes that repress transcription in a region of the genome that is normally assembled into heterochromatin or CENP-A-containing chromatin (the latter is found at the centromere central core).