Temporal and spatial transcriptional regulation of phytohormone metabolism during seed development in barley (Hordeum vulgare L.)

Plant hormones play important roles in seed development; however, transcriptional regulation of their metabolism and levels the respective bioactive forms during barley development is poorly understood. To this end, study performed a comprehensive analysis changes expression patterns phytohormone genes embryo endosperm tissues. Our showed presence elevated abscisic acid (ABA), gibberellins (GAs), jasmonate (JA) cytokinins (CKs), auxin salicylic (SA) tissues at early stage filling (SF). The all both tissues, except that ABA, decreased to low SF. In contrast, embryonic ABA level increased SF peaked physiological maturity (PM) while endospermic was maintained similar observed Although its high amount still present post-PM. We detected other post-PM phase relatively higher jasmonoyl-isoleucine SA late data also spatiotemporal plant are mediated by specific involved metabolic pathways. These results indicate modulation hormones.