Arabidopsis whole-transcriptome profiling defines the features of coordinated regulations that occur during secondary growth

摘要: Secondary growth in the inflorescence stems of Arabidopsis plants was induced by a combination short-day and long-day treatments. The were divided into three different stem developmental stages (i.e., immature, intermediate, mature) with regard to secondary growth. Whole transcriptome microarrays used examine changes global gene expression occurring at stages. Over 70% expressed tissues. In mature growth, 567 genes upregulated 5-fold or higher 530 downregulated, when compared immature (with no growth) 10-day old seedlings stem). transcription phenotypes obtained from largely confirm existing insights biochemical processes involved sequential events that lead wood formation. major difference found between undergoing only primary profiles transcriptional regulation-and signal transduction-related genes. An analysis several shoot apical meristem (SAM) activity-related patterns indicated genetic control activity might be governed mechanism SAM. current study established many unknown identified candidate are regulation findings described this report should improve our understanding molecular mechanisms regulate development stem.