Estudios sistemáticos en Turnera (Turneraceae). II. Series Annulares, Capitatae, Microphyllae y Papilliferae

Arbo, María Mercedes

doi:10.30972/bon.101-41452

Cited by 20 publications

(38 citation statements)

References 3 publications

(8 reference statements)

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“…No crosses with distylous species have been undertaken to explore compatibility relationships or the inheritance of homostyly. Turnera chamaedrifolia and three subspecies of T. sidoides occur both as distylous and homostylous populations (Arbo, 1985(Arbo, , 2000. Likewise, for the outgroup Piriqueta species, P. viscosa is homostylous and P. morongii is composed of both distylous and homostylous populations (Arbo, 1995;M.…”

Section: Evolution Of Base Chromosome Number-three Different Base Chrmentioning

confidence: 95%

“…Turnera is the largest genus in the family, containing approximately 120 species native to the Americas (ranging from the southern USA to central Argentina), while two species are native to Africa (Urban, 1883; Arbo, 1997Arbo, , 2000. Turnera is divided into nine series (Urban, 1883); the Salicifoliae, Stenodictyae, Annulares, Capitatae, Microphyllae, Papilliferae, Turnera (ϭCanaligerae, Urban), Anomalae, and Leiocarpae.…”

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confidence: 99%

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Phylogenetic relationships, chromosome and breeding system evolution inTurnera(Turneraceae): inferences from its sequence data

Truyens

Arbo

Shore

2005

American J of Botany

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Turnera provides a useful system for exploring two significant evolutionary phenomena-shifts in breeding system (distyly vs. homostyly) and the evolution of polyploids. To explore these, the first molecular phylogeny of Turnera was constructed using sequences of the internal transcribed spacer region (ITS) of nuclear ribosomal DNA for 37 taxa. We attempted to resolve the origins of allopolyploid species using single-strand conformation polymorphism and sequencing of homeologous copies of ITS. Two allohexaploid species possessed putative ITS homeologues (T. velutina and T. orientalis). A phylogenetic analysis to identify progenitors contributing to the origins of these polyploids was unsuccessful, possibly as a result of concerted evolution of ITS. Breeding system evolution was mapped onto the phylogeny assuming distyly to be ancestral in Turnera. Self-compatible homostyly appears to have arisen independently at least three times in Turnera; however, we were not able to determine whether there have been independent origins of homostyly among hexaploid species in series Turnera. Our phylogenetic analyses suggest that series Turnera is monophyletic. Neither series Microphyllae nor Anomalae, however, appear to be monophyletic. Future taxonomic revisions may require new circumscriptions of these latter series.

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Section: Evolution Of Base Chromosome Number-three Different Base Chrmentioning

confidence: 95%

mentioning

confidence: 99%

Phylogenetic relationships, chromosome and breeding system evolution inTurnera(Turneraceae): inferences from its sequence data

Truyens

Arbo

Shore

2005

American J of Botany

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“…Interestingly, the distylous specimens cultivated in Corrientes Argentina were somewhat self‐compatible and set a few autogamous seeds although the ovaries possess c . 90 ovules (Arbo, 2000).…”

Section: Polyploidy and Breeding Systemsmentioning

confidence: 99%

Breeding system variation, genetics and evolution in the Turneraceae

2006

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We review the genetics and evolution of breeding systems in the Turneraceae. Distyly occurs in seven of 10 genera and 81% of species. The remaining species are homostylous. Polyploid evolution has been significant in Turnera . Approximately 60% of species are polyploid ranging from diploid through decaploid. No relationship between breeding system and polyploidy is evident. The genetics of distyly involves a one-locus two-allele system ( S and s). Evidence from crosses with homostylous species and mutants is consistent with the possibility that a ' Primula -type' supergene underlies distyly but does not prove this to be the case. A polygalacturonase, and an α -dioxygenase specific to the transmitting tissue of short-styled plants both exhibit morph-limited expression in concert with predictions from an evolutionary model. The function of the proteins in distyly, if any, is unknown. We have begun constructing a fine-scale genetic map of Turnera . Two genetic markers lie within 0.2 c M of the distyly locus. This should provide a starting point for positional cloning of the distyly locus and reveal the genetic architecture and molecular basis of distyly.New Phytologist (2006) 171: 539-551

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“…Turneraceae is a tropical and subtropical family, with ten genera. The genus Turnera includes about 100 species in America and two in Africa, gathered in nine series, whereas Piriqueta has 44 species in America and one in Africa (Arbo, 1995, 1997, 2000).…”

Section: Introductionmentioning

confidence: 99%

“…Trichomes are one of the key characters used to differentiate Piriqueta and Turnera , the former having simple, porrect‐stellate and setiform glandular trichomes (Arbo, 1995), whereas Turnera has simple, sometimes stellate, hairs and different types of glandular trichomes. The presence and distribution of the main trichome types were described in taxonomic papers (Arbo, 1981, 1985, 1987, 1993, 1997, 2000). An anatomical study of floral indumentum was made in Piriqueta racemosa , Turnera joelii and T. hassleriana (Gonzalez, 1993).…”

Section: Introductionmentioning

confidence: 99%

Trichome complement of Turnera and Piriqueta (Turneraceae)

González

Arbo

2004

Botanical Journal of the Linnean Society

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The indumentum of Piriqueta and Turnera is made up of nine different types of trichomes, which broadly can be divided into glandular and non-glandular. Taking into account foot shape, head size and pedicle size, five variants of glandular trichomes are recognized: microcrapitate, stipitate-capitate, sessile-capitate and setiform. The non-glandular trichomes can be simple (unicellular or pluricellular-uniseriate), stellate or porrect-stellate. The setiform glandular hairs are present in most species of Piriqueta . Simple unicellular hairs are the most widespread type, frequently being found in combination with other trichomes. Stellate trichomes show a restricted distribution in both genera. Within Piriqueta , section Africana has only simple trichomes, whereas section Piriqueta has also porrectstellate trichomes; groups of species can be set up according to the presence and type of glandular trichomes. Within Turnera the stipitate-capitate trichomes are exclusive to series Papilliferae ; sessile-capitate trichomes are found in series Microphyllae , Annulares and in some species of Salicifoliae ; clavate trichomes are found only in series Turnera ; setiform glandular hairs are exclusive to T. collotricha , whereas the microcapitate trichomes are widely distributed.

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Estudios sistemáticos en Turnera (Turneraceae). II. Series Annulares, Capitatae, Microphyllae y Papilliferae

Cited by 20 publications

References 3 publications

Phylogenetic relationships, chromosome and breeding system evolution inTurnera(Turneraceae): inferences from its sequence data

Phylogenetic relationships, chromosome and breeding system evolution inTurnera(Turneraceae): inferences from its sequence data

Breeding system variation, genetics and evolution in the Turneraceae

Trichome complement of Turnera and Piriqueta (Turneraceae)

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