ArticleFunctional & integrative genomics2026
Genome-wide identification and cold stress expression of inducer of CBF expression (ICE) transcription factors in Taraxacum kok-saghyz.
Article in Functional & integrative genomics, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Low-temperature stress severely restricts plant growth and agricultural production. The INDUCER OF CBF EXPRESSION (ICE) transcription factors are key regulators of the plant cold response. To investigate the molecular characteristics of the ICE gene family and their regulatory functions in response to low-temperature stress in Taraxacum kok-saghyz (TKS), we systematically identified 7 TksICEs in TKS at the whole-genome level, and simultaneously selected 3 HbICEs in Hevea brasiliensis for comparative analysis. Results showed that the ICE gene family mainly expanded via whole-genome duplication and segmental duplication, evolved under purifying selection, and exhibited both evolutionary conservation and lineage-specific divergence. The promoters of TksICEs contained significantly more stress and hormone-responsive elements than those of HbICEs. Expression analysis revealed that TksICEs displayed tissue specificity, and most were upregulated under cold stress and cold acclimation. Subcellular localization and transcriptional activation assays confirmed that TksICE6 was localized in the nucleus and exhibited obvious transcriptional activation activity. Yeast two-hybrid assays verified the physical interaction of TksICE6 with TksHOS1 and TksMUTE, suggesting its potential roles in cold signal transduction and stomatal development regulation. This study systematically characterized the structural features, evolutionary patterns of the ICE gene family in TKS and H. brasiliensis, as well as the expression profiles of TksICEs, providing a theoretical basis and candidate gene resources for elucidating the molecular mechanisms of cold tolerance in TKS and facilitating molecular breeding.
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