Arthur de Lima Silva and colleagues present a hypothesis of floral evolution for the family, illustrating a shift from bisexuality to unisexuality and the evolution of nectaries in a complex monocot family, which can...
Tag - floral evolution
botanyone
Pollinators drive floral evolution in an Atlantic Forest genus
Can we use floral traits to accurately predict hummingbird and bat pollinators of the bromeliad genus Vriesea?
William Salter
Tricky flowers: how floral variation in a food-deceptive orchid is maintained over generations
Sometimes it's a good idea not to send a consistent message to your pollinators.
Laura Skates
Detecting canalization and intra-floral modularity in triggerplant (Stylidium) flowers
The Berg hypothesis proposes that specialized-flower traits experience stronger stabilizing selection than non-floral structures and predicts that variation in specialized-flower traits will be mostly uncorrelated with...
Alex Assiry
Trait variation across a plant hybrid zone 25 years in the making
In natural hybrid zones, traits often show clines, gradual variation across a gradient reflecting a balance between natural selection and gene flow. Changes over time in average values for traits, and especially the...
An orchid matches its scent emission rhythm to the local pollinators
Some flowers only smell at day and some only at night, but how did they evolve these different rhythms? In our study, we investigate if populations of the same orchid species that are more pollinated either at day or at...
Elodie Chapurlat
Bilateral flower symmetry developmental genetics in Proteaceae
Bilateral symmetry has evolved as an adaptive trait linked to efficient pollination and successful outcrossing, occurring over 170 times in angiosperms and in many plant groups relying upon the asymmetric expression of...
Floral integration is more related to mating than pollination system
Almost 60 years ago, Berg proposed that floral integration and pollination system should be associated as a consequence of the selective pressures promoting successful cross-pollination. Evidence, however, suggests...
Zygomorphy evolved from disymmetry in Fumarioideae
Floral bilateral symmetry (zygomorphy) has evolved at least 70 times during the history of angiosperms, whilst radial symmetry (actinomorphy) is the ancestral and most common state for angiosperms as a whole. Sauquet et...
Floral adaptation to pollinator guilds in Switzerland
Pollinator-driven speciation week continues, with Floral adaptation to local pollinator guilds in a terrestrial orchid, a paper by Sun, Gross and Schiestl. The star is the orchid Gymnadenia odoratissima, and orchid...
Alun Salt
Variation and evolution of herkogamy in Exochaenium
The spatial separation of stigmas and anthers (herkogamy) functions to reduce self-pollination and avoid interference between pollen dispersal and receipt. Little is known about the evolutionary relationships among the...
A bee’s eye view of flowers
The large, tunnel-like, dark-red flowers of Iris atropurpurea are likely to have evolved to mimic protective shelters preferred by male solitary bees.
AJ Cann
