Evolution of floral morphology and pollination system in Bignonieae (Bignoniaceae)

2010 ◽  
Vol 97 (5) ◽  
pp. 782-796 ◽  
Author(s):  
Suzana Alcantara ◽  
Lúcia G. Lohmann
Keyword(s):  
Floral Morphology ◽  
Pollination System

A new species of Canavalia (Leguminosae, Papilionoideae) from Brazil with a specialized corolla suggesting bird pollination

Phytotaxa ◽  
2015 ◽  
Vol 207 (1) ◽  
pp. 115 ◽  
Author(s):  
Cristiane Snak ◽  
Gwilyn Peter Lewis ◽  
Douglas Eduardo Rocha ◽  
Luciano Paganucci Queiroz
Keyword(s):  
New Species ◽  
Systematic Study ◽  
New World ◽  
Floral Morphology ◽  
The Other ◽  
Bee Pollination ◽  
Pollination System ◽  
Bird Pollination ◽  
A New Species

During the development of a systematic study of the species of Canavalia from the New World a new species with floral morphology suggesting a bird pollination system was found, contrasting with the bee pollination pattern of the genus. Canavalia reflexiflora differs from the other species of the genus mainly by its flowers with a reflexed standard; in addition, it also has red flowers, wing and keel petals as long as the standard petal, and an oblong seed with the hilum surrounding nearly half the seed circumference.

Generalised pollination system of Erythrina dominguezii (Fabaceae : Papilionoideae) involving hummingbirds, passerines and bees

2012 ◽  
Vol 60 (6) ◽  
pp. 484 ◽  
Author(s):  
Ángela V. Etcheverry ◽  
Dulce Figueroa-Castro ◽  
Trinidad Figueroa-Fleming ◽  
María M. Alemán ◽  
Víctor D. Juárez ◽  
...  
Keyword(s):  
Floral Morphology ◽  
Pollen Deposition ◽  
Pollination System ◽  
Phylogenetic Studies ◽  
Visitation Rates ◽  
Hummingbird Pollination ◽  
Basal Clade ◽  
Nectar Sugar ◽  
Floral Visitors ◽  
Intermediate Value

Plants in the genus Erythrina are pollinated by birds, such that passerine pollination is the plesiomorphic state, whereas hummingbird pollination is the derived character. Phylogenetic studies suggest that Erythrina dominguezii belongs to a basal clade characterised as pollinated by both passerines and hummingbirds. Here, we characterise the pollination system of E. dominguezii. Floral morphology, nectar traits, breeding system, visitation rates and pollen deposition by its floral visitors were studied. Floral morphology of E. dominguezii showed traits associated with both passerine and hummingbird pollination. Nectar sugar concentration showed an intermediate value but closer to the hummingbird type; however, it was rich in hexose, which is typical of the passerine type. Approximately 5% of the flowers set fruits under free pollination. Almost 80% of recorded flowers were visited by birds, with the rest visited by hymenopterans (bumblebees and honeybees). Among avian pollinators, five species of hummingbirds and three passerine species were identified as pollinators. The hummingbird Chlorostilbon lucidus was the most efficient visitor in terms of pollen deposition and was second in frequency of visits. The passerine Icterus cayanensis was second in efficiency at depositing pollen and was the most frequent pollinator. Our results show that E. dominguezii has a generalised pollination system. In addition, we report a new case of closed flowers and secondary nectar presentation. This is the first study that compares effectiveness among different pollinators in Erythrina.

Floral morphology of certain species of the Papilionaceae with a special reference to stamen adelphy

Taeckholmia ◽  
2001 ◽  
Vol 21 (1) ◽  
pp. 153-172 ◽  
Author(s):  
Abd El-Salam Al- Nowaihi ◽  
Karima Hamed ◽  
Magdy Mourad
Keyword(s):  
Special Reference ◽  
Floral Morphology

Floral morphology and pollen viability of an endangered and endemic Bromeliaceae species from the Atlantic Forest

Grana ◽  
2021 ◽  
pp. 1-20
Author(s):  
Valéria Leobina dos Santos ◽  
Catarina Carvalho Nievola ◽  
Adriana de Oliveira Fidalgo ◽  
Shoey Kanashiro ◽  
Maria das Graças Lapa Wanderley ◽  
...  
Keyword(s):  
Atlantic Forest ◽  
Floral Morphology ◽  
Pollen Viability

Floral Morphology ofApuleia leiocarpa(Dialiinae: Leguminosae), an Unusual Andromonoecious Legume

2013 ◽  
Vol 174 (2) ◽  
pp. 154-160 ◽  
Author(s):  
Erin Zimmerman ◽  
Gerhard Prenner ◽  
Anne Bruneau
Keyword(s):  
Floral Morphology

scholarly journals Generalized olfactory detection of floral volatiles in the highly specialized Greya-Lithophragma nursery pollination system

2021 ◽  
Author(s):  
Florian P. Schiestl ◽  
Erika A. Wallin ◽  
John J. Beck ◽  
Magne Friberg ◽  
John N. Thompson
Keyword(s):  
Selective Advantage ◽  
Floral Volatiles ◽  
Pollination System ◽  
Allopatric Populations ◽  
Evolutionary Scenario ◽  
Plant Recognition ◽  
Hexahydrofarnesyl Acetone ◽  
Electroantennographic Detection ◽  
Local Host ◽  
Olfactory Detection

AbstractVolatiles are of key importance for host-plant recognition in insects. In the pollination system of Lithophragma flowers and Greya moths, moths are highly specialized on Lithophragma, in which they oviposit and thereby pollinate the flowers. Floral volatiles in Lithophragma are highly variable between species and populations, and moths prefer to oviposit into Lithophragma flowers from populations of the local host species. Here we used gas chromatography coupled with electroantennographic detection (GC-EAD) to test whether Greya moths detect specific key volatiles or respond broadly to many volatiles of Lithophragma flowers. We also addressed whether olfactory detection in Greya moths varies across populations, consistent with a co-evolutionary scenario. We analyzed flower volatile samples from three different species and five populations of Lithophragma occurring across a 1400 km range in the Western USA, and their sympatric female Greya politella moths. We showed that Greya politella detect a broad range of Lithophragma volatiles, with a total of 23 compounds being EAD active. We chemically identified 15 of these, including the chiral 6, 10, 14-trimethylpentadecan-2-one (hexahydrofarnesyl acetone), which was not previously detected in Lithophragma. All investigated Lithophragma species produced the (6R, 10R)-enantiomer of this compound. We showed that Greya moths detected not only volatiles of their local Lithophragma plants, but also those from allopatric populations/species that they not encounter in local populations. In conclusion, the generalized detection of volatiles and a lack of co-divergence between volatiles and olfactory detection may be of selective advantage for moths in tracking hosts with rapidly evolving, chemically diverse floral volatiles.

Quantitative Trait Loci Affecting Differences in Floral Morphology Between Two Species of Monkeyflower (Mimulus)

Genetics ◽  
1998 ◽  
Vol 149 (1) ◽  
pp. 367-382 ◽  
Author(s):  
H D Bradshaw ◽  
Kevin G Otto ◽  
Barbara E Frewen ◽  
John K McKay ◽  
Douglas W Schemske
Keyword(s):  
Quantitative Trait Loci ◽  
Reproductive Isolation ◽  
Quantitative Trait ◽  
Floral Morphology ◽  
Cumulative Effect ◽  
Sympatric Species ◽  
Accurate Estimate ◽  
Phenotypic Variance ◽  
Trait Loci ◽  
Morphological Differences

Abstract Conspicuous differences in floral morphology are partly responsible for reproductive isolation between two sympatric species of monkeyflower because of their effect on visitation of the flowers by different pollinators. Mimulus lewisii flowers are visited primarily by bumblebees, whereas M. cardinalis flowers are visited mostly by hummingbirds. The genetic control of 12 morphological differences between the flowers of M. lewisii and M. cardinalis was explored in a large linkage mapping population of F2 plants (n = 465) to provide an accurate estimate of the number and magnitude of effect of quantitative trait loci (QTLs) governing each character. Between one and six QTLs were identified for each trait. Most (9/12) traits appear to be controlled in part by at least one major QTL explaining ≥25% of the total phenotypic variance. This implies that either single genes of individually large effect or linked clusters of genes with a large cumulative effect can play a role in the evolution of reproductive isolation and speciation.

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