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Figure 6 | BMC Plant Biology

Figure 6

From: Transcriptional analysis of cell growth and morphogenesis in the unicellular green alga Micrasterias(Streptophyta), with emphasis on the role of expansin

Figure 6

Maximum likelihood phylogeny of the plant expansin gene family (A) Maximum likelihood (ML) phylogeny of the plant expansin gene family, showing the phylogenetic position of the Micrasterias and Spirogyra genes. Numbers at nodes indicate ML bootstrap values (top) and Bayesian posterior probabilities (bottom); values below 50 and 0.9, respectively, are not shown. Dd, Dictyostelium discoideum (outgroup); Pp, Physcomitrella patens; Os, Oryza sativa; At, Arabidopsis thaliana. (B) Possible events hypothetically explaining the distribution of expansin gene families in land plants and Zygnematophyceae. The organismal tree is based on multigene phylogenetic analyses [5, 6] and only includes taxa in which expansins have been found, along with Coleochaete that apparently lacks expansins based on transcriptome analyses [27]. The dotted line in the tree indicates phylogenetic uncertainty. "(a)" marks ancestral gene families, EXPA' and EXPA'' represent the EXPA-related genes found in Micrasterias and Spirogyra respectively.

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