Figure 8.

A Proposed Model for the Role of PLD/PA in Regulating ROS Production and Response under Water Deficits.

This model depicts only the known targets of PLD/PA in ABA-mediated stomatal closure; other ABA regulators are not included in this model. GAPCox refers to oxidized, catalytically inactive GAPC that interacts with PLDδ and promotes PLDδ activity. GAPCred refers to reduced, active GAPC that converts glyceraldehyde-3-phosphate (G3P) to 1,3-bisphosphoglycerate (1,3-bisPG) with NADH production. PLDα1 uses preferably phosphatidylcholine (PC), whereas PLDδ prefers phosphatidylethanolamine (PE) as substrate. Solid arrows indicate established links, and dashed arrows denote putative links. PM, plasma membrane.