Maize Genotypes Sensitive and Tolerant to Low Phosphorus Levels Exhibit Different Transcriptome Profiles under Talaromyces purpurogenus Symbiosis and Low-Phosphorous Stress

Talaromyces purpurogenus, an endophytic fungus, exhibits beneficial effects on plants during plant–fungus interactions. However, the molecular mechanisms underlying plants’ responses to T. purpurogenus under low-phosphorous (P) stress are not fully understood. In this study, we investigated transcriptomic changes in maize with low-P-sensitive (31778) and -tolerant (CCM454) genotypes low-P its symbiotic interaction purpurogenus. Its colonization enhanced plant growth facilitated P uptake, particularly 31778. Transcriptome sequencing revealed that 135 DEGs from CCM454 389 31778 were identified, only 6 common. This suggested exhibited distinct inoculation. GO KEGG analysis associated nicotianamine biosynthesis, organic acid metabolic process, inorganic anion transport, biosynthesis of various secondary metabolites nitrogen metabolism. CCM454, anthocyanin diterpenoid process. After inoculation, genes phosphate transporter, phosphatase, peroxidase high-affinity nitrate transporter upregulated 31778, whereas AP2-EREBP-transcription factors detected at significantly higher levels CCM454. study provided insights plant–endophytic fungus symbiosis genotypes.