Up, down and up again is a signature global gene expression pattern at the beginning of gymnosperm embryogenesis 

 -  Gene Expression Patterns, 3(1), p.83-91, 2003 .
<br/><br/> Somatic embryogenesis of a gymnosperm, Picea abies, represents a sequence of specifically regulated developmental stages including proembryogenic mass (PEM), PEM-to-embryo transition, and early and late embryogeny. Here, we report cDNA array analysis of expression patterns of 373 genes in the beginning of P. abies embryo development. The analysis revealed a group of 107 genes (29 
<br/><br/><label>Subjects--Topical Terms: </label><br/>PICEA ABIES<br/>EMBRYOGENESIS<br/>CDNA ARRAYS<br/>GENE EXPRESSION PROFILE<br/>TRANSCRIPTIONALLY REPRESSIVE STATE<br/>DEVELOPMENTALLY REGULATED GENES<br/>ARRESTED CELL LINE