abnormal chromatin silencing midori A transcription regulation phenotype observed in the vegetative growth phase of the life cycle in which chromatin silencing is abnormal. 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). abnormal chromatin silencing during mitotic cell cycle FYPO:0000144 2011-04-12T05:48:37Z 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). abnormal chromatin silencing during vegetative growth abnormal gene silencing abnormal negative regulation of transcription during vegetative growth