Abscisic acid biosynthesis is necessary for full auxin effects on hypocotyl elongation.

ABSTRACT: In concert with other phytohormones, auxin regulates plant growth and development. However, how auxin and other phytohormones coordinately regulate distinct processes is not fully understood. In this work, we uncover an auxin-abscisic acid (ABA) interaction module in Arabidopsis that is specific to coordinating activities of these hormones in the hypocotyl. From our forward genetics screen, we determine that ABA biosynthesis is required for the full effects of auxin on hypocotyl elongation. Our data also suggest that ABA biosynthesis is not required for the inhibitory effects of auxin treatment on root elongation. Our transcriptome analysis identified distinct auxin-responsive genes in root and shoot tissues, which is consistent with differential regulation of growth in these tissues. Furt

SUBMITTER: Emenecker RJ 

PROVIDER: S-EPMC10730017 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature