A Eucalyptus EST database was prepared and used for extracting genes
specifically expressed in Eucalyptus reaction wood tissues using
microarray analysis. As a result, genes were broadly classified into a
gene cluster with a predominantly high expression, a gene cluster with a
lower expression, and a gene cluster that is virtually unchanged, in
Eucalyptus reaction wood as compared to ordinary trunks. It is thought
that the gene cluster with predominantly high expression and the gene
cluster with low expression can be used to control cell wall biosynthesis
and wood fiber cell morphogenesis