ArticleBMC plant biology2025
Genome-wide analysis of the CCT gene family in Liriodendron chinense highlights potential functions in light signaling and chlorophyll biosynthesis.
Article in BMC plant biology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed.
- Environmental stress responses and climate vulnerability of Abies beshanzuensis: combined physiological and transcriptomic analysis.BMC plant biology · 2026Article
- Genome-wide identification of the BBX gene family in kiwifruit and analysis of its expression responses to multiple types of stress.BMC genomics · 2026Article
- Genome-wide identification and expression analysis of the CCT gene family reveals its function in regulating heading date in proso millet (Frontiers in plant science · 2026Article
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9 authors.
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Abstract
backgroundCCT (CONSTANS, CO-LIKE, and TIMING OF CAB EXPRESSION 1) domain-containing genes play essential roles in regulating photoperiod flowering, circadian rhythms, and environmental adaptation in plants. However, their composition, evolutionary dynamics, and potential functions remain largely unexplored in Liriodendron chinense, an ecologically and economically important relict tree species.
resultsIn this study, we conducted a genome-wide identification and characterization of the CCT gene family in L. chinense, identifying 30 LcCCT genes unevenly distributed across 15 chromosomes. Phylogenetic, conserved motif, and gene structure analyses revealed distinct domain architectures among the three major subfamilies (COL, PRR, and CMF), suggesting functional diversification. Promoter cis-element analysis and transcriptome profiling indicated that LcCCT genes are involved in green tissue development and responses to abiotic stress. Further qRT-PCR validation showed that several LcCCT genes, including LcCCT9, LcCCT21, LcCCT24, and LcCCT27, exhibited coordinated expression with chlorophyll biosynthesis and accumulation during leaf development. Moreover, circadian rhythm experiments under long-day and short-day conditions demonstrated photoperiod-dependent rhythmic expression of these genes, implying their participation in light signaling and the diurnal regulation of key chlorophyll biosynthesis (LcACSF) and light-harvesting (LcLHCb1 and LcLHCb2) genes.
conclusionsThis study provides the first comprehensive characterization of the CCT gene family in L. chinense, revealing its conserved domain structure, diverse regulatory potential, and possible roles in leaf greening, chlorophyll biosynthesis, and light signaling. These findings establish a soild foundation for future functional investigations into the molecular mechanisms governing growth and environmental adaptation in Liriodendron species.
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