Abstract
Phosphorus is an essential nutrient for organismal growth and development, and its absorption and transport primarily depend on the phosphate transporter (PHT) family. Although the functions of PHTs have been extensively studied in plants and algae, the researches on PHTs in microorganisms, particularly in Trichoderma species, remain limited. In this study, we identified 22 PHT family members in Trichoderma harzianum T-aloe through a genome-wide analysis. Phylogenetic analysis classified these members into three major clusters: Cluster I (8 members), Cluster II (12 members), and Cluster III (2 members). Furthermore significant differences among cluster members in gene structure, protein topology, subcellular localization, conserved motifs, and promoter cis-elements were revealed. Notably, the pronounced induction of all TrPHT genes under phosphate deficiency, coupled with their suppression under salt stress, suggests a finely-tuned regulatory mechanism that coordinates phosphate homeostasis with stress adaptation. In addition, TrPHT1/2/4/15/22 were induced in response to Fusarium graminearum stress. The TrPHT1/4/22 mutants exhibited significantly decreased total phosphorus content, accompanied by compromised antifungal efficacy against F. graminearum and reduced salt stress tolerance. Together, our results provide foundational insights into the PHT family in T. harzianum and demonstrate that TrPHTs are critical for maintaining phosphorus homeostasis and mediating responses to both biotic and abiotic stresses.
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Data availability
The datasets generated and/or analyzed during the current study are included in this published article and its Supplementary Information files. The genome sequences of Trichoderma harzianum T-aloe used for gene identification are available from the corresponding author upon reasonable request. All TrPHT protein sequences identified in this study are provided in Supplementary Table S2.
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Acknowledgements
We are grateful to the members of the lab for their assistance and helpful discussions. We sincerely thank the editor and reviewers for critically evaluating this manuscript and providing constructive comments for its improvement. We thank Dr. Qi Luo (Zhoukou Normal University, Zhoukou, China) for providing the pathogenic strain of Fusarium graminearum PH-1.
Funding
This work was supported by Henan Province science and technology research and development joint fund (industry) major project (Grant No. 235101610015); Key Research and Development Project of Henan Province (Grant No. 251111110900); The National Natural Science Foundation of China (Grant No. 32402458); Scientific Research Foundation for High-level Talents, Zhoukou Normal University (Grant No. ZKNU2023080).
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**Yibo Zhang: ** Formal analysis, Data curation, Investigation, Writing – original draft, Writing – review and editing. **Chaofeng Dong: ** Formal analysis, Methodology, Visualization. **Zhen Liu: ** Formal analysis, Validation. **Xiaodong Yang: ** Formal analysis, Methodology, Data curation. **Dongxu Lu: ** Formal analysis, Investigation. **Li Wang: ** Formal analysis, Methodology, Investigation. **Huifang Zhang: ** Formal analysis, Validation; **Qingdi Yan: ** Formal analysis, Visualization. **Junchang Li: ** Formal analysis, Software. **Cunjie Li: ** Data curation, Visualization. **Fuli Zhang: ** Supervision, Conceptualization, Writing – review and editing, Funding acquisition.
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Zhang, Y., Dong, C., Liu, Z. et al. Genome-wide identification of phosphate transporter gene family in Trichoderma harzianum and expression in response to biotic and abiotic stress. Sci Rep (2026). https://doi.org/10.1038/s41598-026-43829-6
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DOI: https://doi.org/10.1038/s41598-026-43829-6


