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. 2018 May 23;9:668. doi: 10.3389/fpls.2018.00668

FIGURE 1.

FIGURE 1

Abscisic acid metabolism and signaling pathway in plants. ZEP, zeaxanthin epoxidase; NCED, 9-cis-epoxycarotenoid dioxygenase; ABA2, ABA deficient 2 (short chain alcohol dehydrogenase); AAO3, abscisic aldehyde oxidase; CYP707A1, a cytochrome P450 monooxygenase gene encoding ABA-8′-hydroxylases; PA, phaseic acid; PYR/PYL/RCAR, pyrabactin resistance/pyrabactin-like/regulatory components of ABA receptors; PP2C, protein phosphatase 2C; SnRK2, SNF1-related protein kinase2; ABI3, abscisic acid insensitive 3; ABI4, abscisic acid insensitive 4; ABI5, abscisic acid insensitive 5; VP1, viviparous 1; ABF, ABRE binding factor.