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Hormonal and transcriptomic regulation of drought adaptation in barley roots and leaves
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SYSNO ASEP 0643680 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Hormonal and transcriptomic regulation of drought adaptation in barley roots and leaves Author(s) Collin, A. (PL)
Pacwa-Plociniczak, M. (PL)
Płociniczak, T. (PL)
Novák, Ondřej (UEB-Q) RID, ORCID, SAI
Marzec, M. (PL)
Guo, W. (US)
Simpson, G. G. (GB)
Daszkowska-Golec, A. (PL)Number of authors 8 Article number 16368 Source Title Scientific Reports. - : Nature Publishing Group - ISSN 2045-2322
Roč. 15, č. 1 (2025)Number of pages 14 s. Language eng - English Country GB - United Kingdom Keywords stress tolerance ; abscisic-acid ; growth ; aba ; impact ; Alternative splicing (AS) ; Barley ; Drought ; Hormones ; Metatranscriptomics ; Transcriptomics OECD category Plant sciences, botany Method of publishing Open access Institutional support UEB-Q - RVO:61389030 UT WOS 001488137600004 EID SCOPUS 105004667794 DOI https://doi.org/10.1038/s41598-025-01590-2 Annotation Drought poses a significant threat to global crop productivity and food security. In this study, we aimed to elucidate the impact of drought on transcriptional regulation and alternative splicing in barley (Hordeum vulgare), and to determine whether these transcriptomic alterations correlate with changes in hormonal profiles. We hypothesized that drought stress induces extensive reprogramming of gene expression, including alternative splicing events, and that these molecular responses are accompanied by tissue-specific shifts in hormone levels, ultimately underpinning adaptive responses in both leaves and roots. To test this, we performed RNA-seq and comprehensive hormone profiling on leaves and roots sampled at 25 days after planting under both optimal and drought conditions. Our analysis identified over 6,655 differentially expressed genes, with a substantial subset exhibiting differential alternative splicing. In leaves, drought primarily downregulated photosynthesis-related genes while upregulating pathways involved in water stress and abscisic acid (ABA) signaling. In contrast, roots displayed broader metabolic adjustments and significant isoform switching. Hormone analysis revealed marked ABA accumulation, particularly in roots, alongside organ-specific modulation of jasmonates and auxins. A limited assessment of the rhizosphere microbial community revealed low transcript abundance, underscoring the primacy of intrinsic plant responses. Collectively, these findings provide valuable insights into the multilayered adaptive strategies of barley under drought stress. Workplace Institute of Experimental Botany Contact David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Year of Publishing 2026 Electronic address https://doi.org/10.1038/s41598-025-01590-2
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