The Arabidopsis Genome Database (AGD) is an electronic database freely accessible to the public, providing comprehensive biological information about Arabidopsis thaliana, a widely studied model plant species. This database serves a multitude of purposes, including fundamental research, disease analysis and treatment, drug discovery, plant nutrition, and population genetics. The AGD is designed to encompass or provide links to five primary categories of datasets: 1) genomes, 2) gene annotations, 3) genetic variations, 4) gene expression, and 5) microbiome.