Gibberellin-induced mesocotyl elongation in deep-sowing tolerant maize inbred line 3681-4

摘要

In order to elucidate the molecular mechanism of gibberellin (GA)-induced mesocotyl elongation, gene expression profiling analyses were performed in a deep-sowing tolerant maize inbred line 3681-4. Gene expression studies combining Affymetrix GeneChip analysis and Real-time PCR were employed to determine the molecular mechanism underlying GA promotion of maize mesocotyl elongation. These studies showed that a mount of genes, such as the GA receptor GID1, the transcriptional factor MYB, and the genes encoding the DELLA protein DWRF8, kinases, Raf, LRR and RLCK, might play a critical role in maize mesocotyl elongation. Moreover, the genes that were involved in flavonoid biosynthesis, aminosugars metabolism, cell wall synthesis and modification were also found to be responsible for this process.