A dynamic transcriptome underling the light inhibition of mesocotyl elongation in rice seedling

The mesocotyl, a structure separating the grass seedling cotyledon from the coleoptile, exerts a major influence over the seedling’s ability to emerge. Its elongation is inhibited by light. A transcriptomic comparison between mesocotyl tissue which had developed in the dark and which had been exposed to light identified a large number of differentially transcribed genes (DTGs) Six RNA pools were used to characterize the transcriptomic response of the mesocotyl to light: these were sampled from one to five days old seedlings grown in the dark (respectively, D_1d, D_3d, D_5d) and then from five day old dark-grown seedlings exposed to light for 30 min, 60 min or 24 h (L_0.5h, L_1h, L_24h).