Arabidopsis thalianais a small flowering plant which is widely usedby plant science researchers as a model organism to study plantdevelopmental processes. It is a member of the Brassica family, likecabbage and radish. Unlike those species, however, it has no majoragronomic importance.A.thalianadoes have several advantages forthe researcher however. These include, among others, a small genomesize (a haploid content of around 100 Mbp of DNA which is distributedamong five chromosomes), a rapid life cycle (about 5 weeks from seedto seed), easy cultivation in restricted space, prolific seedproduction, and a large number of mutant stocks are available forresearchers from the stock centers at

Nottingham UK and Ohio State University USA.


This image shows three Arabidopsis seedlings which are (from left): wild type grown in the light, wild type grown in the dark, cop mutant grown in the dark. Notice that the dark-grown cop mutant essentially mimics the light-grown wild type.