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Effect of pollination on floral longevity and costs of delaying fertilization in the out-crossing Polygala vayredae Costa (Polygalaceae).
TLDR
A strong relationship between pollination and floral longevity was observed, and Flowers revealed the ability to extend or reduce their longevity, within some limits, in response to the abundance of efficient pollinators.
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Systematic studies in Tylosema (Leguminosae)
TLDR
This revision was to elucidate the taxonomic position of the specimens collected in south Angola, and to provide a review of species boundaries in the genus, especially between T. angolense P. Silveira & S. Castro sp.
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Consequences of nectar robbing for the fitness of a threatened plant species
TLDR
The data obtained suggest that in this species, nectar robbing has important indirect and negative effects on plant fecundity, through both male and female functions, due to a modification in the foraging behaviour of legitimate visitors.
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How flower biology and breeding system affect the reproductive success of the narrow endemic Polygala vayredae Costa (Polygalaceae)
TLDR
The reproductive strategy of P. vayredae prevents inbreeding depression by a self-incompatibility system, which in years of scarce pollinators is overcome by the plant habit.
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Evaluation of polysomaty and estimation of genome size in Polygala vayredae and P. calcarea using flow cytometry
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Taxonomic revision of the genus Calendula (Asteraceae) in the Iberian Peninsula and the Balearic Islands
A taxonomic revision of the genus Calendula is presented, based on an extensive analysis of its morphological variation, which allowed a re-evaluation of the species delimitations in the Iberian…
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Flow cytometric and karyological analyses of Calendula species from Iberian Peninsula
TLDR
The obtained genome size values and their variation are discussed in the light of the theories proposed for the speciation of the genus, with events of hybridization, genome duplication and dysploidy being hypothesized to play a major role in the evolution of this genus.
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How does secondary pollen presentation affect the fitness of Polygala vayredae (Polygalaceae)?
TLDR
The secondary pollen presentation mechanism may in fact be an accurate system for pollen transport, but it may also have its costs.
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Floral traits variation, legitimate pollination, and nectar robbing in Polygala vayredae (Polygalaceae)
TLDR
Nectar was revealed to be an important trait in flower–visitor interactions, with legitimate pollinations being primarily influenced by this floral reward and an indirect negative selection over phenotypic floral traits mediated by nectar robbers is proposed.
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So many visitors and so few pollinators: variation in insect frequency and effectiveness governs the reproductive success of an endemic milkwort
TLDR
Variation in the abundance and assemblage of floral visitors was observed at the temporal scale and among populations, with the effective pollinators being generally scarce, and the reproductive outcome in this species was low and significantly variable among populations and years.
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