Figure 6.

Proposed metabolic modifications to phosphatidylcholine and its derivatives in seminal roots of barley following a short‐term salt stress. The hypothesised reactions involved in PC maintenance. Solid lines: flux of the glycerol backbone. Dashed lines: acyl fluxes. Italized names are enzymatic reactions. Boxed enzymes are those of which the encoding gene is still unclear. Non‐italized are lipid names. Colour schemes: Black, Lyso‐PL; Gold, PLD;Turquoise, GPCAT; Purple, LPCT. Colour arrow: dark red, upregulation/increase;dark blue, downregulation/decrease. Abbreviations: PA – phosphatidic acid; PC – phosphatidylcholine; LPC –lysophosphatidylcholine; GPC – glycerophosphocholine; Cho – choline; G‐3‐P ‐glycerol‐3‐phosphate. PLDδ – phospholipase D delta; LPCT –lysophosphatidylcholine transacylase; GPCAT – glycerophosphocholine:acyl‐CoAacyltransferase; LysoPL A2 – lysophospholipase A2; GDPD ‐ glycerophosphodiesterphosphodiesterase. *Image was adapted from (Bates, 2016). [Colour figure can be viewed at http://wileyonlinelibrary.com]