ArticleScientific reports2024
Identification and expression analysis of the GLK gene family in tea plant (Camellia sinensis) and a functional study of CsGLK54 under low-temperature stress.
Article in Scientific reports, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed.
- Genome-wide identification of the GLK gene family in wheat (Triticum aestivum L.) and analysis of expression responses in different environments.BMC genomics · 2026Article
- SunflowerBiology · 2025Article
- Genome-Wide Identification ofInternational journal of molecular sciences · 2025Article
- Genome-wide identification of the GLK transcription factor family in melon and its expression analysis under biotic and abiotic stresses.Frontiers in plant science · 2025Article
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Abstract
The Golden2-like (GLK) transcription factor family is a significant group of transcription factors in plantae. The currently available studies have shown that GLK transcription factors have been studied mainly in chloroplast growth and development, with fewer studies in abiotic stress regulation. In this study, all tea plant GLK transcription factors were identified for the first time in tea plants, and genome-wide identification, phylogenetic analysis, and thematic characterization were performed to identify 66 GLK transcription factors in tea plants. These genes are categorized into seven groups, and an amino acid sequence comparison analysis is performed. This study revealed that the structure of GLK genes in tea plants is highly conserved and that these genes are distributed across 14 chromosomes. Collinearity analysis revealed 17 pairs of genes with fragment duplications and one pair of genes with tandem duplications, and the analysis of Ka/Ks ratios indicated that most of the genes underwent negative purifying selection. Analysis of promoter cis-elements revealed that the promoters of tea plant GLK genes contain a large number of cis-acting elements related to phytohormones and stress tolerance. In addition, a large number of genes contain LTR elements, suggesting that tea plant GLK genes are involved in low-temperature stress. qRT‒PCR analysis revealed that the expression of CsGLK17, CsGLK38, CsGLK54, CsGLK11 and CsGLK60 significantly increased and that the expression of CsGLK7 and CsGLK13 decreased in response to low-temperature induction. Taken together, the results of the transcription profile analysis suggested that CsGLK54 may play an important regulatory role under low-temperature stress. The subcellular localization of CsGLK54 was in the nucleus. Furthermore, CsGLK54 positively regulated the transcription levels of the NbPOD and NbSOD genes under low-temperature stress, which led to an increase in POD and SOD enzyme activities and a decrease in MDA content. These findings provide valuable insights into the regulatory mechanism of low-temperature stress in tea plants.
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