Tag Archives: evo-devo

AP1/SEP/AGL6 MADs-box genes in a basal eudicot

AP1/SEP/AGL6 MADs-box genes in a basal eudicot

AP1/SEP/AGL6 MADs-box genes in a basal eudicot

MADS-box transcriptional regulators play important roles during plant development. Sun et al. study structural and functional variation of FUL-like (AP1 subfamily), SEP-like and AGL6-like genes in the basal eudicot Epimedium sagittatum and provide a description of EsFUL-like, EsAGL2-1, EsAGL2-2 and EsAGL6-like function divergence and conservation in comparison to a selection of model core eudicots. The results highlight how organization in genomic segments containing A- and E-class genes in sequenced model species has resulted in similar topologies of AP1 and SEP-like gene trees.

Shoot apical meristem structure in oil palm

Shoot apical meristem structure in oil palm

Shoot apical meristem structure in oil palm

Oil palm (Elaeis guineensis) is an unbranched palm, possessing a single shoot apical meristem (SAM) that may remain active for more than 100 years. Through histological analysis and 3-D reconstructions, Jouannic et al. detail the SAM structural variations that occur during the oil palm life cycle, and find that development of the SAM is characterized by a juvenile-to-mature phase transition accompanied by establishment of a zonal pattern and modified shape. SAM zonation is dynamic during the plastochron period and displays distinct features compared with other monocots.

Cabomba as a model basal angiosperm (Review)

Cabomba as a model basal angiosperm (Review)

Cabomba as a model basal angiosperm (Review)

Early-diverging angiosperms are important for studies of the origin and early evolution of the flower. Vialette-Guiraud et al. discuss the potential of the water lily Cabomba (Nymphaeales) as a model basal angiosperm, as it combines simplicity of floral structure, numerous pleisiomorphic angiosperm characters, and practical features that make it amenable to study using a broad range of molecular biological techniques. They also provide protocols for the growth and molecular analysis of Cabomba, a Cabomba flower EST database, and a genome size measurement of C. caroliniana.