Evolutionary changes in reproductive compatibility is an important process contributing to the high levels of species diversity in Dendrobium.
Tag - speciation
botanyone
Phylogeny and diversity of Myrcia section Aulomyrcia
Examination of 1 nuclear and 4 plastid markers produces a phylogeny supporting the need to unite the taxons of two traditional genera, Myrcia and Marlierea.
Diversification and evolution of dispersal ability in Brassiceae
Increased dispersal ability in Brassiceae can influence macro-evolutionary processes, possibly by increasing the propensity for long-distance dispersal.
Why would a plant make its pollination less efficient?
The special issue on pollinator-driven speciation is available with free access now. We covered a few of the papers last year, but now they’re all free. One of the more puzzling papers is Novel adaptation to...
Alun Salt
Corolla morphology and diversification rates in toadflaxes
Results suggest that opposing individual-level/species-level selection pressures have driven evolution of pollinator-restrictive traits in bifid toadflaxes.
Plants adapt to accommodate a long proboscis in South Africa.
Our Grant-Stebbins week continues. Today it’s a question of looking at the geographical context of floral adaptations. Why might you find a plant here and not there? Is it the pollinators that cause it? Matching...
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...
Can the Grant-Stebbins model explain where all the flowers come from?
Valentine’s Day is coming, and many people are looking for the right flower to express their feelings, though it’s hard to beat a multi-coloured rose. But where do all the different sorts of flowers come...
Do pollinators drive the evolution of flowers?
Angiosperms, the flowering plants, are the astonishingly diverse. But what drives the selection pressures to create this diversity? One explanation is the Grant-Stebbins model. This model looks at pollination as a...
Polyploidy in Leucanthemum in the Iberian Peninsula
Using molecular and systematic techniques to infer the evolutionary history of the L. pluriflorum clan in the north-west of the Iberian Peninsula.
Chromosome evolution in marginal Aegilops speltoides populations (Review)
Genome restructuring is an ongoing process in natural plant populations and the influence of environmental changes on the genome is crucial.
Plastid and nuclear variation among apomictic polyploids
Apomicts are plants grown from seeds or spores are produced without fertilization.
Sexual organ reciprocity in distylous primroses
The main morphological characteristic of heterostyly is the reciprocal placement of anthers and stigmas in two distinct floral morphs; however, the partitioning of reciprocity within and between closely related species...
New taxonomy of Brachypodium distachyon
The model grass species Brachypodium distachyon has three cytotypes that are currently regarded as part of a single species. Catalán et al. combine analysis of phenotypic traits with multiple cytogenetic analyses and...
