May play a role in transcriptional processes (PubMed:21875893). Regulates negatively the senescence and chlorotic lesions induced by biotic (e.g. pathogens) and abiotic (e.g. sugars, darkness) agents, probably by controlling programmed cell death (pcd) (PubMed:11846876,PubMed:9338960, Ref.6, PubMed:11728314). Negative regulator of plant programmed cell death (PCD) and effector-triggered immunity (ETI) (PubMed:25455564). Promotes cell division and endoreduplication (e.g. in trichomes) (PubMed:11728314). Interacts with SIM and SMR1 (PubMed:25455564). Ubiquitous. Plants are more resistant to pathogens such as P.syringea and P.parasitica and develops spontaneous lesions. Truncated N-terminus.