Plant hormones, also known as phytohormones, are chemicals that regulate plant cell processes. They are signal molecules produced within the plant functioning in extremely low concentrations.

College of Tobacco Science of Guizhou University, Guizhou Provincial Key Laboratory for Tobacco Quality Improvement and Efficiency Enhancement/Guizhou Key Lab of Agro-Bioengineering/Key Laboratory of ...

Cancer Res (2025) 85 (8_Supplement_1): 1172. T cells are sparse in hormone receptor-positive (HR+) breast cancer, potentially due to limited antigen presentation, but the mechanisms remain unclear.