Morphological characterization in the genus Passiflora L.: an approach to understanding its complex variability

Perez, John Albeiro Ocampo; D'Eeckenbrugge, Géo Coppens

doi:10.1007/s00606-017-1390-2

Cited by 56 publications

(31 citation statements)

References 43 publications

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“…We checked that these articles included field observations or anecdotal records of plants being visited by the sword-billed hummingbird (Table 1). Following this procedure, in addition to personal field observations, and study reports of the interaction [22–24,26,30–34], we compiled 24 plant species as the “plant guild” of E . ensifera (Table 1).…”

Section: Methodsmentioning

confidence: 99%

Range overlap between the sword-billed hummingbird and its guild of long-flowered species: An approach to the study of a coevolutionary mosaic

et al. 2018

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The coevolutionary process among free-living mutualists with extremely long matching traits may favor the formation of mutualistic interaction networks through coevolutionary escalation, complementarity and convergence. These networks may be geographically structured; the links among the species of a local network are shaped by the biotic composition of the community, thus creating selection mosaics at broader geographical scales. Therefore, to fully understand a coevolutionary process, it is crucial to visualize the geographical structure of the interaction network across the landscape. In this study we focused on the poorly known interaction system between Ensifera ensifera and its guild of long-flowered plant species. We combined occurrence data and environmental variables to predict E. ensifera distribution, in addition to range polygons available for plant species in order to evaluate the geographical variation in bill length and plant species richness. A positive relationship between bill length and plant species richness within the E. ensifera range suggests a geographical structuring of the interaction networks. At mid-latitude locations of E. ensifera range, where hummingbirds attained the longest bills, richness of long-flowered plant species was higher than at low latitude locations. These locations likely represent coevolutionary vortices where long-lasting reciprocal selection probably drove the evolution of long traits, consequently drawing new plant species into the coevolutionary network. Conversely, areas where the sword-billed hummingbird was absent or had shorter bills probably represent coevolutionary coldspots. Our results provide a first insight into this phenotypically specialized plant-pollinator network across the landscape and show candidate areas to test the predictions of the coevolutionary hypothesis, such as reciprocal selection.

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Section: Methodsmentioning

confidence: 99%

Range overlap between the sword-billed hummingbird and its guild of long-flowered species: An approach to the study of a coevolutionary mosaic

et al. 2018

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“…The pattern of clustering based on the pollinic characteristics allowed to classify the species into two subgenera, Passiflora and Decaloba, congruent with the classification of Feuillet and MacDougal (2003) and supported by phylogenetic studies using molecular markers and sequencing technique (Yockteng and Nadot 2004, Hansen et al 2006, Mäder et al 2010, Porter-Utley 2014, Milwardde-Azevedo et al 2014b, Muschner et al 2012, Krosnick et al 2013, Ocampo and D'Eeckenbrugge 2017. These authors revealed that the Passiflora and Decaloba subgenera showed monophyletic clades.…”

Section: Discussionmentioning

confidence: 57%

Comparative pollen morphological analysis in the subgenera Passiflora and Decaloba

Soares

Jesus

Souza

et al. 2018

An. Acad. Bras. Ciênc.

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The genus Passiflora is the most diversified of the Passifloraceae, and its palynology presents wide morphological variability. The objective of the study was to evaluate the pollen morphology of 18 Passiflora species in order to identify informative pollinic characteristics to contribute to the taxonomic classification of the genus. The morphology of the pollen grains and the exine structure were investigated using light microscopy and scanning electron microscopy. Differences in the pollen morphology were found in the studied species, mainly in terms of shape, pollen aperture and ornamentation pattern of the exine. Most of the species belonging to the subgenus Passiflora presented ornamented 6-syncolpate pollen grains with an oblate-spheroidal shape and an exine with large lumens. In the subgenus Decaloba the pollen grains were 6-colporate, 12-colpate and 12-colporate, with subprolate to prolate-spheroidal shape, as well as an exine with smaller lumen size and few ornamented. The pollen morphology of the species of the subgenera Passiflora and Decaloba has shown palynological characteristics that have specific diagnostic value, thus allowing a better understanding of the taxonomy of the genus Passiflora.

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“…Principal Components Analysis (PCA) is a useful statistical method to evaluate morphological variation. It has been used to circumscribe taxa of plants from the Bromeliaceae (Gardner, 1983), Passifloraceae (Porter-Utley, 2003Ocampo Pérez, 2007;Ocampo Pérez & Coppens d'Eeckenbrugge, 2017), Fabaceae (Castro et al, 2005), Arecaceae (Henderson, 2004(Henderson, , 2006, and the Calceolariaceae (Puppo, 2008), among others. The data used in the PCA were the mean values of measurements taken from each specimen.…”

Section: Principal Component Analysis (Pca)mentioning

confidence: 99%

A Taxonomic Revision ofPassiflorasect.Xerogona(Passifloraceae) Using Principal Component Analysis

Espinoza

Jørgensen

MacDougal

2018

Annals of the Missouri Botanical Garden

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In subgenus Decaloba (DC.) Rchb. of Passiflora L., the section Xerogona (Raf.) Killip (Passifloraceae) is a group of herbaceous vines found in subtropical and tropical regions of the Americas. Primarily distributed in Central America, with a few also found in the West Indies and South America, the species of Passiflora sect. Xerogona are recognized by their unusual dehiscent capsular fruit, the absence of bracts and laminar nectaries, and their transversely grooved seeds. Passiflora tenella Killip is the only species included in Passiflora sect. Xerogona with a fruit that does not appear to be a capsule, but the shape of the leaves and the absence of floral bracts and laminar nectaries suggest affiliation with this section. Fifteen species, including two subspecies, are recognized within Passiflora sect. Xerogona. Passiflora cobanensis Killip is distinguished as two subspecies, P. cobanensis subsp. cobanensis and P. cobanensis subsp. brevipes (Killip) T. Boza, with the latter subspecies transferred from P. brevipes Killip. From previous species circumscriptions, this section contains two problematic species complexes for P. capsularis L. and P. rubra L. The morphological variation between and within these two species complexes was examined in this study, using Principal Component Analysis and correlation matrices of morphological characters, and this variation was studied throughout their distributional ranges. Passiflora capsularis is recognized as a single variable species. Two species are recognized within the P. rubra complex, based primarily on floral characters, as P. cisnana Harms and P. rubra. Passiflora cisnana is lectotypified.

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Morphological characterization in the genus Passiflora L.: an approach to understanding its complex variability

Cited by 56 publications

References 43 publications

Range overlap between the sword-billed hummingbird and its guild of long-flowered species: An approach to the study of a coevolutionary mosaic

Range overlap between the sword-billed hummingbird and its guild of long-flowered species: An approach to the study of a coevolutionary mosaic

Comparative pollen morphological analysis in the subgenera Passiflora and Decaloba

A Taxonomic Revision ofPassiflorasect.Xerogona(Passifloraceae) Using Principal Component Analysis

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