This delimitation is quite recent and is based on morphological and molecular phylogenies by O'Kane and Al-Shehbaz[1][2] and others.

The most recent reclassification moves two species previously placed in Cardaminopsis and Hylandra and three species of Arabis into Arabidopsis, but excludes 50 that have been moved into the new genera Beringia, Crucihimalaya, Ianhedgea, Olimarabidopsis, and Pseudoarabidopsis.

In the last two decades, Arabidopsis thaliana has gained much interest from the scientific community as a model organism for research on numerous aspects of plant biology.

In Europe, the model organism resource centre for Arabidopsis thaliana germplasm, bioinformatics and molecular biology resources (including GeneChips) is the Nottingham Arabidopsis Stock Centre (NASC) whilst in North America germplasm services are provided by the Arabidopsis Biological Resource Center (ABRC) based at Ohio State University.

[5] Arabidopsis thaliana seeds were taken to the Moon on the Chang'e 4 lander in 2019, as part of a student experiment.