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Cover Illustration: A silique of Arabidopsis thaliana enclosing ovules containing torpedo-shaped embryos cultured horizontally in a hormone-free, sucrose-containing medium, photographed 25 d after culture in the dark and 1 d in
continuous light. Seedlings arise by viviparous germination of embryos, which complete their development but do not lapse into dormancy. Normal plants are raised by subsequent transplantation of seedlings to soil vermiculite. See Raghavan: Induction of vivipary in Arabidopsis by silique culture: implications for seed dormancy and germination,
pp. 766-776 in this issue. Photo credit: V. Raghavan.
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