HvABI5 is an important ABA-dependent regulator of drought stress response at heading time in barley

ABA INSENSITIVE5 (HvABI5) is a transcription factor regulating barley response to drought stress. We conducted RNA-seq for gain-of-function mutant in HvABI5 gene, Hvabi5.d. Comparative transcriptome analysis of RNA from the second leaf below the flag leaf revealed activation of genes involved in stress response and jasmonic acid biosynthesis in Hvabi5.d when drought was applied at heading. In contrast, florigen gene, Flowering Locus T (HvFT), and auxin-related genes showed decreased expression patterns. Additionally, in this study, we measured stomatal conductance and photosynthesis performance under drought applied at heading stage.