Delving into the loss of heterostyly in Rubiaceae: Is there a similar trend in tropical and non-tropical climate zones?

Ferrero, Victoria; Rojas, Danny; Vale, Ángel; Navarro, Luis

doi:10.1016/j.ppees.2011.11.005

Cited by 19 publications

(17 citation statements)

References 55 publications

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“…Despite this large number, multiple origins of the breeding system are not uncommon. Heterostyly evolved independently two to 10 times in Linaceae (McDill et al., ), five times in Lythraceae (Morris, ), four times in Pontederiaceae (Kohn et al., ), and two to three times in Rubiaceae (Ferrero et al., ). Current research suggests that within angiosperm families, multiple origins of heterostyly are more common than is a single origin followed by multiple losses, a pattern resolved only in Menyanthaceae (Tippery and Les, , ).…”

Section: Discussionmentioning

confidence: 99%

A phylogenetic analysis of morphological and molecular characters of Boraginaceae: evolutionary relationships, taxonomy, and patterns of character evolution

Cohen

2013

Cladistics

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The angiosperm family Boraginaceae includes ca. 1600 species distributed among ca. 110 genera. Some floral features are constant within the family, but many vegetative, floral, pollen, and nutlet traits vary. Utilizing 224 species of Boraginaceae and related taxa, five matrices were constructed with various combinations of morphological characters, three chloroplast DNA regions, and one nuclear ribosomal DNA region. Phylogenetic analyses were conducted for these matrices, and patterns of character evolution were examined. Boraginaceae is resolved as monophyletic, with Wellstedia as its sister. Codon is sister to Boraginaceae + Wellstedia. Although most of the investigated morphological characters have a low consistency index, particular character states are synapomorphies for large clades in each of the tribes of the family. In Boraginaceae, the breeding system heterostyly evolved at least 12 times, which is the largest number of origins resolved in any family; therefore Boraginaceae can serve as a model for the evolution and development of heterostyly. Nutlet ornamentation is most diverse in Cynoglosseae and Trichodesmeae, while pollen and floral features are most variable in Boragineae and Lithospermeae. Phylogenetic relationships and patterns of character evolution identified in the present study set the stage for future work creating an updated taxonomic system of Boraginaceae.

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Section: Discussionmentioning

confidence: 99%

A phylogenetic analysis of morphological and molecular characters of Boraginaceae: evolutionary relationships, taxonomy, and patterns of character evolution

Cohen

2013

Cladistics

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“…Nevertheless, the evolution of heterostyly has been tested in only a few groups to date (e.g. Kohn et al, 1996;Schoen et al, 1997;Church, 2003;Graham & Barrett, 2004;Mast et al, 2004;Truyens, Arbo & Shore, 2005;Morris, 2007;Ferrero et al, 2011bFerrero et al, , 2012. In all cases, the first step towards the elucidation of the evolution of the reciprocal condition is to characterize the morphological traits linked to the expression of the heterostylous syndrome, as they may provide some insight into the underlying evolutionary steps.…”

Section: Introductionmentioning

confidence: 99%

Unravelling the stylar polymorphism inMelochia(Malvaceae): reciprocity and ancillary characters

2014

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Heterostyly is a genetic polymorphism in which plant populations possess two (distyly) or three (tristyly) morphs with flowers differing reciprocally in stigma and anther height. Sex organ deployment has been described as being highly variable among and within species of several distylous taxa belonging to different taxonomic groups. However, the number of studies considering within‐species disparities is still limited. For a better overview of the existing amount of variation that can occur within and between heterostylous species, we sampled 46 populations of six Melochia spp., a style‐polymorphic genus in Cuba. We characterized the floral morphology in all populations and described a set of ancillary characters per species. All of these Melochia spp. are distylous, except for the monomorphic M. nodiflora. The S‐morph produces fewer, larger pollen than L‐morphs, and has verrucose ornamentation. The L‐morph produces reticulate pollen and has larger stigmatic papillae than the S‐morph. The monomorphic M. nodiflora shows ancillary characteristics that are similar to the L‐morph individuals in the related species. As expected, there are differences in ancillary characters among species and also dissimilarities in reciprocity among and within species of Melochia. Our results highlight the importance of considering intraspecific variation in the morphometric characterization of heterostylous taxa. © 2014 The Linnean Society of London, Botanical Journal of the Linnean Society, 2014, 176, 147–158.

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“…Rubiaceae é a família com maior número de espécies distílicas dentre as 28 famílias de angiospermas que apresentam este polimorfismo (Hamilton 1990;Faivre & Mcdade 2001). Estudos com espécies distílicas de Rubiaceae nos trópicos têm demonstrado uma gama de variações nos padrões heterostílicos, independentemente, das relações filogenéticas dos táxons (e.g., Sakai & Wright 2008;Ferrero et al 2012). Os gêneros Psychotria e Declieuxia fazem parte da subfamília Rubiodeae, porém se encontram em tribos distintas (Psychotrieae e Coussareeae, respectivamente).…”

Section: Introductionunclassified

Sistema reprodutivo atípico de duas espécies de Rubiaceae: distilia com autoincompatibilidade parcial no morfo brevistilo?

et al. 2016

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Resumo Espécies distílicas possuem populações com dois morfos florais. O morfo longistilo possui flores com pistilos longos e estames curtos e o morfo brevistilo, pistilos curtos e estames longos. Normalmente, os morfos apresentam um sistema heteromórfico de incompatibilidade e os morfos estão em uma razão de 1:1 (isopletia) nas populações. Diferentes variações podem ser encontradas em espécies distílicas, como a presença de autocompatibilidade, anisopletia e variações no nível de reciprocidade entre anteras e estigmas dos dois morfos. O objetivo desse trabalho foi investigar a ocorrência das características distílicas em duas espécies de Rubiaceae. Para isso, a razão dos morfos, a hercogamia recíproca, o sistema de incompatibilidade e os visitantes florais de Psychotria deflexa e Declieuxia fruticosa foram estudados. Ambas as espécies apresentaram os dois morfos em proporção semelhante, altos valores de reciprocidade entre a altura dos verticilos sexuais dos morfos florais e apenas insetos como visitantes florais. O morfo brevistilo das duas espécies apresentou autoincompatibilidade parcial. Dentro de Rubiaceae, mesmo em grupos filogenéticos distintos, o relaxamento ou quebra da distilia parece ocorrer em padrões similares e comumente tal variação é mais comum no morfo longistilo. Para as espécies estudadas, mesmo com a pseudocompatibilidade do morfo brevistilo, as populações apresentaram proporção igual dos morfos, indicando que fatores como a alta hercogamia recíproca e, possivelmente, o serviço de polinização podem promover a manutenção da isopletia característica da distilia.

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Delving into the loss of heterostyly in Rubiaceae: Is there a similar trend in tropical and non-tropical climate zones?

Cited by 19 publications

References 55 publications

A phylogenetic analysis of morphological and molecular characters of Boraginaceae: evolutionary relationships, taxonomy, and patterns of character evolution

A phylogenetic analysis of morphological and molecular characters of Boraginaceae: evolutionary relationships, taxonomy, and patterns of character evolution

Unravelling the stylar polymorphism inMelochia(Malvaceae): reciprocity and ancillary characters

Sistema reprodutivo atípico de duas espécies de Rubiaceae: distilia com autoincompatibilidade parcial no morfo brevistilo?

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