ArticleBMC genomics2025
Genome-wide analysis of the Tritipyrum bHLH gene family and the response of TtbHLH310 in salt-tolerance.
Article in BMC genomics, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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2 citing papers in PubMed.
- Integrated physiological and transcriptomic analysis reveals the key pathways ofFrontiers in plant science · 2025Article
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Abstract
backgroundThe bHLH transcription factor is prevalent across the plant kingdom and is crucial for various abiotic stress responses in different plant species. Tritipyrum, an octoploid created from an intergeneric cross between Triticum aestivum (AABBDD) and Thinopyrum elongatum (EE), serves as a significant source of germplasm, facilitating the incorporation of desirable traits from Th. elongatum into T. aestivum. With the recent availability of the complete genome sequences of T. aestivum and Th. elongatum, it has become feasible to investigate the organization and expression patterns of bHLH genes within the Tritipyrum genome.
resultsIn this study, a total of 398 bHLH genes (TtbHLH) were identified within the Tritipyrum genome. These genes were classified into twenty major groups based on evolutionary analysis, indicating that they share conserved motif compositions. The TtbHLH genes are distributed across 28 chromosomes and include 67 duplication events. Synteny analysis suggests a common ancestral lineage for the bHLH gene family. Transcriptome data and quantitative polymerase chain reaction (qPCR) expression profiling identified 29 TtbHLH genes with significantly elevated expression levels in response to various salt-stress conditions and recovery treatments. Notably, Tel1E01T336100 (TtbHLH310) demonstrated a pronounced sensitivity to salt stress and is phylogenetically related to the salt-tolerant gene AtbHLH6 in Arabidopsis thaliana. Additionally, Pearson correlation analysis revealed 485 genes that exhibited a strong positive correlation (R > 0.9) with TtbHLH310 expression, which was enriched in pathways related to metabolic activities, cellular processes, stimulus responses, and biological regulation. Further analysis through real-time PCR confirmed that TtbHLH310 is highly expressed in the roots, stems, and leaves under salt-stress conditions.
conclusionsThe findings indicate that TtbHLH310 may play a pivotal role in enhancing salt stress tolerance in plants. Its strong expression in response to salt stress highlights its potential as a valuable foreign gene for improving salt tolerance in wheat. These insights contribute to our understanding of the molecular mechanisms underpinning abiotic stress responses in Tritipyrum and may aid in the development of more resilient wheat varieties.
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