A new role for the SHATTERPROOF genes during Arabidopsis gynoecium development.
Gynoecium development is a complex process which is regulated by key factors that control the spatial formation of the apical, medial and basal parts. SHATTERPROOF1 (SHP1) and SHP2, two closely related MADS-box genes, redundantly control the differentiation of the dehiscence zone and promote the lignification of adjacent cells. Furthermore, SHP1 and SHP2 have shown to play an important role in ovule identity determination. The present work identifies a new function for these two genes in promoting stigma, style and medial tissue development. This new role was discovered by combining the shp1 shp2 double mutant with the aintegumenta (ant) and crabs claw (crc) mutants. In quadruple mutant flowers, the inner whorl is composed of unfused carpels which lack almost completely apical and medial tissues, a phenotype similar to the previously reported fil ant and lug ant double mutants.
Colombo
Monica
M
Dipartimento di Biologia, Università degli Studi di Milano, Via Celoria 26, 20133 Milano, Italy.
Brambilla
Vittoria
V
Marcheselli
Riccardo
R
Caporali
Elisabetta
E
Kater
Martin M
MM
Colombo
Lucia
L
D017360:Arabidopsis / Q000166:cytology / Q000196:embryology* / Q000235:genetics* / Q000648:ultrastructure; D029681:Arabidopsis Proteins / Q000235:genetics* / Q000378:metabolism; D018506:Gene Expression Regulation, Plant; D017343:Genes, Plant / Q000235:genetics*; D055993:Germ Cells, Plant / Q000166:cytology / Q000378:metabolism* / Q000648:ultrastructure; D026161:MADS Domain Proteins / Q000235:genetics* / Q000378:metabolism; D008954:Models, Biological; D009154:Mutation / Q000235:genetics; D010641:Phenotype
D029681:Arabidopsis Proteins; D026161:MADS Domain Proteins; C419044:SHP1 protein, Arabidopsis; C419045:SHP2 protein, Arabidopsis