DNA microarray comparisons of plant factor- and nitrogen deprivation-induced Hormogonia reveal decision-making transcriptional regulation patterns in Nostoc punctiforme.

ABSTRACT: Hormogonia are nongrowing filaments, motile by means of a gliding mechanism, that are produced by certain cyanobacteria. Their differentiation is induced by positive and negative factors for growth, such as deprivation of combined nitrogen (nitrogen stress induction [NSI]). In Nostoc punctiforme, they are also induced by the exudate (hormogonium-inducing factor [HIF]) of a symbiotic plant partner. Time course (0.5 to 24 h) transcription profiles were determined by DNA microarray assays for hormogonia of N. punctiforme following induction by HIF and NSI. Clustering analysis revealed both common and distinct transcriptional patterns for the two methods of induction. By 24 h, a common set of 1,328 genes was identified. This 24-h common set of genes arose by the transition of 474 genes from an

SUBMITTER: Campbell EL 

PROVIDER: S-EPMC2576649 | biostudies-literature | 2008 Nov

REPOSITORIES: biostudies-literature