The transcript abundance of genes involved in ABA and GA pathways is affected in mRNA decay mutants. The quantification of transcript abundance is shown for NCED6, NCED9, CYP707A2, ABI5, SLP2, Ga3ox1, Ga20ox4, and Ga2ox2 in seeds of Col-0 (white bars), vcs-8 (striped bars), and xrn4-5 (dotted bars) after 24 h of imbibition at 25°C. a.u., Arbitrary unit (100 value was attributed to Col-0). Means ± sd of triplicate experiments are shown. Letters indicate homogenous groups in a corresponding class (ANOVA test and Newman-Keuls tests, P = 0.05).