Medicago truncatula seed development at 14/11°C 16 light/dark

Transcriptional profiling of seeds of Medicago truncatula during maturation. To identify genes that are regulated during seed maturation in the model legume Medicago truncatula, plants at flowering stage were grown at controlled temperature of 14/11°C, 16h light/dark. Seeds were then collected at different stages of development. Using the Medicago NimbleGen chip, a transcriptomic analysis was performed to follow the differential expression of genes during seed maturation. Seeds of Medicago truncatula grown at 14/11°C, 16h light/dark were collected at different developmental stages, 10 developmental stages were analysed. Two replicates from each developmental stage were used for dye switch, each time the control was considered as the earlier developmental stage vs the treatment, corresponding to the later developmental stage. For each repetition 5 hybridisation were made: 22DAP vs 28DAP, 34DAP vs 40DAP, 46DAP vs 52DAP, 58DAP vs 65DAP,Abs vs DS. For each biological replicates, RNA was extracted from 50 seeds collected from 5 different plants, grown in the same conditions. One replicate per array.