Transcriptomic analyses show that MAPK signaling pathways and calcium-dependent kinases are actively modulated during mycorrhizal colonization, indicating dynamic gene expression responses rather than fixed structural mutations. Cellular signaling studies identify calcium-dependent protein kinases (e.g., OsCPK18) as early-response marker genes activated by fungal diffusible signals, functioning as molecular indicators of pre-symbiotic communication. Recent open-access research on plant–fungus interaction shows that calmodulin (CAM/CML) gene families are upregulated in root tissues during mycorrhizal symbiosis, highlighting calcium-sensing networks as central communication modules. Large-scale fungal genome sequencing demonstrates that mycorrhizal fungi evolve symbiosis through gene co-option, loss of degradative enzymes, and expansion of transporter genes, meaning the “network” is co-evolved between plant and fungus rather than driven solely by plant mutations
At the biochemical level, ERG11 ’s function as a heme-dependent monooxygenase interlocks with the cell’s oxidative balance. Heme fluctuations within the nucleus can alter the activity of heme-responsive transcription factors and chromatin modifiers, introducing a chemical feedback loop between metabolism and genetic variation (Puig & Gutiérrez, 2022). Reactive oxygen species generated by azole stress promote DNA oxidation and base substitution events preferentially within open chromatin domains. This coupling of redox chemistry with mutation formation constitutes a nuclear-scale biochemical evolution engine—one where chemical disequilibrium catalyzes genomic diversity in real time.
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