Unlike in animals, dioecy among flowering plants is a rare phenomenon. The vast majority of angiosperm species have bisexual flower that combines male (androecium) and female (gynoecium) reproductive organs. However, about quarter dioecious flowers, which can be located within the same plant (monoecious) or on different (dioecious). formation determined by various genetic mechanisms. They becom...

We isolated and characterized two ovule-specific MADS box cDNAs from petunia, designated floral binding protein (fbp) genes 7 and 11. The putative protein products of these genes have -90% of their overall amino acid sequence in common. In situ RNA hybridization experiments revealed that both genes are expressed in the center of the developing gynoecium before ovule primordia are visible. At la...

Mutations in the AGAMOUS (AG) gene cause transformations in two adjacent whorls of the Arabidopsis flower. Petals develop in the third floral whorl rather than the normal stamens, and the cells that would normally develop into the fourth whorl gynoecium behave as if they constituted an ag flower primordium. Early in flower development, AG RNA is evenly distributed throughout third and fourth wh...

Abstract Orchid gynostemium, the fused organ of androecium and gynoecium, ovule development are unique developmental processes. Two DROOPING LEAF/CRABS CLAW (DL/CRC) genes, PeDL1 PeDL2, were identified from Phalaenopsis orchid genome functionally characterized. Phylogenetic analysis indicated that most recent common ancestor orchids contained duplicated DL/CRC-like genes. Temporal spatial expre...