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Agata Daszkowska-Golec

@dash-genetics.bsky.social

Plant geneticist | splicing under stress | Associate Professor @USilesia | Fulbrighter @UMN | Barley whisperer

Agata Daszkowska-Golec @dash-genetics.bsky.social · 16/07/2025

🌱 Just out: our new review on ABA’s surprising roles in flowering & seed development in J. Plant Physiology! Dive into fresh insights on how ABA shapes plant reproduction ➡️ www.sciencedirect.com/science/arti... #PlantBiology #ABA #Flowering #SeedDev

Role of ABA in regulation of heading in rice. ABA can promote and delay heading time in rice. ABA-dependent transcription factor, OsbZIP23, positively regulates homologs of FLOWERING LOCUS T (FT), Heading date 3a (Hd3a) and RICE FLOWERING LOCUS T1 (RFT1). Furthermore, ABA-dependent kinase, STRESS-ACTIVATED PROTEIN KINASE10 (SAPK10), phosphorylates FLOWERING LOCUS D1 (OsFD1) and promotes formation of Flowering Activation Complex (FAC) built of OsFD1, 14-3-3 proteins and Hd3a. On the other side, ABA can delay heading date. ABA-dependent kinase, SAPK8, phosphorylates ABRE BINDING FACTOR (OsABF1), what in turn represses expression of heading regulators, Early heading date1 (OsEhd1) and OsEhd2. Furthermore, ABA-dependent transcription factors, ABA-RESPONSIVE ELEMENT BINDING PROTEIN 1 (OsAREB1) and ABA RESPONSIVE ELEMENT (ABRE)-BINDING FACTOR8 (OSBZ8), directly activate expression of gene encoding negative regulator of heading, RICE CENTRORADIALIS 1 (OsRCN1). Moreover, OsbZIP23, can interact with Hd3a/Flowering Locus T-like (OsFTL1)/RFT1. It promotes formation of Flowering Repressing Complex (FRC) consisted of OsbZIP23, 14-3-3 proteins and Hd3a/OsFTL1/RFT1 what in turn inhibits heading. Figure was created in BioRender

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Agata Daszkowska-Golec @dash-genetics.bsky.social · 30/06/2025

our spatial transcriptomics research on ABA-treated germinating barley coleoptile as signaling hub not just what’s expressed — but where it whispers first doi.org/10.1101/2025... #spatialtranscriptomics #seedbiology #barley #10xGenomics @10xgenomics.bsky.social

Spatial transcriptomics analysis of germinating embryos under control conditions and in the presence of ABA. Histological visualization of
embryos and spatial representation of cluster localization.

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