Table 1

Summary of WOX protein expression domains and function

Protein

Alternative name (if any) in species listed

Clade

Expression domain

Function

Species

WUS

WUS clade

SAM, ovule, anther

Stem-cell maintenance, anther and ovule development

A. thaliana, snapdragon, petunia

WOX1

WUS clade

Lateral organ primordia

Lateral organ formation

A. thaliana, petunia

WOX2

WUS clade

Apical embryo domain

Embryo patterning

A. thaliana

WOX3

PRS1 (in maize NS1 and NS2)

WUS clade

SAM, peripheral zone

Promotes cell proliferation, lateral organ formation

A. thaliana, maize, petunia, rice

WOX4

WUS clade

Unknown

Unknown

WOX5

WUS clade

RAM

Stem-cell maintenance

A. thaliana, rice

WOX6

PFS2, hos9

WUS clade

Female gametophyte

Prevents differentiation, cold-stress response

A. thaliana

WOX7

WUS clade

A. thaliana

WOX8

Intermediate clade

Basal embryo domain

Embryo patterning

A. thaliana

WOX9

STIMPY

Intermediate clade

Basal embryo domain

Embryo patterning, promote cell proliferation

A. thaliana, tomato, petunia

WOX10

Ancient clade

Unknown

Unknown

A. thaliana

WOX11

Intermediate clade

SAM and RAM

Crown root development

Rice

WOX12

Intermediate clade

Unknown

Unknown

A. thaliana

WOX13

Ancient clade

Root, inflorescence

Floral transition, root development

A. thaliana

WOX14

Ancient clade

Root, inflorescence

Floral transition, root development

A. thaliana

SAM, shoot apical meristem; RAM, root apical meristem.

van der Graaff et al. Genome Biology 2009 10:248   doi:10.1186/gb-2009-10-12-248