BioEssays 1994-Oct
Arabidopsis thaliana, a plant Drosophila.
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Arabidopsis thaliana is a small cruciferous weed which grows naturally, mainly in Europe. Because of its qualities of small size, rapid growth, low chromosome number and self-fertilisation, I adapted it to aseptic growth in purified agar in sterile test-tubes. I found that it secreted various substances into the medium, but not in type or amount likely to interfere with the expression of biosynthetic mutants. Following X-irradiation of seed, I obtained a number of mutants, including several lethals. One lethal mutant I discovered to be deficient in thiamine synthesis. It was the first biosynthetic mutant to be found in flowering plants.