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. Author manuscript; available in PMC: 2022 Feb 6.
Published in final edited form as: J Exp Bot. 2019 Apr 12;70(7):2097–2112. doi: 10.1093/jxb/erz072

Figure 1. Hypothetical regulatory network of the plant dPCD process.

Figure 1

Coordinated with cellular differentiation, dPCD competency is achieved at least partly on the transcriptional level. A range of PCD-associated genes are upregulated, and their proteins accumulate in cells that are preparing to undergo PCD. Once competent, a hypothetical trigger starts the PCD execution process. Finally, partial or complete corpse clearance is achieved by activity of degrading enzymes that are activated during PCD and complete corpse clearance post mortem. Conceivably, proteases might play roles in all of these steps, but so far only few protease functions in dPCD have been characterized in detail.