Ana M. Cialdella

Instituto de Botanica Darwinion

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Osvaldo Morrone

Instituto de Botanica Darwinion

Fernando O. Zuloaga

Instituto de Botanica Darwinion

Juan C. Vilardi

Fundación Ciencias Exactas y Naturales

Liliana M. Giussani

Instituto de Botanica Darwinion

Carolina L. Pometti

Fundación Ciencias Exactas y Naturales

Diego L. Salariato

Instituto de Botanica Darwinion

Beatriz O. Saidman

University of Buenos Aires

Silvana M. Sede

Instituto de Botanica Darwinion

Beatriz O. Saidman

Fundación Ciencias Exactas y Naturales

Cecilia Bessega

Consejo Nacional de Investigaciones Científicas y Técnicas

Cooperative Institutions

Consejo Nacional de Investigaciones Científicas y Técnicas

University of Buenos Aires

Instituto de Botanica Darwinion

Fundación Ciencias Exactas y Naturales

Centro Científico Tecnológico - Tucumán

Missouri Botanical Garden

Centro Científico Tecnológico - San Juan

Institute of Astronomy and Space Physics

National Museum of Natural History

University of Missouri–St. Louis

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Novedades nomenclaturales en la tribu Stipeae (Poaceae, Pooideae) para la Flora Argentina

DOAJ (DOAJ: Directory of Open Access Journals) (2010)

Ana M. Cialdella

Cialdella, A. M. 2010. Nomenclatural novelties in the tribe Stipeae (Poaceae, Pooideae) for the Argentine- an flora. Darwiniana 48(2): 168-174. During the revision of the Stipeae (Poaceae) for the Argentinean flora and in accordance to the latest phylogenetic studies in the tribe, it became necessary to transfer some recently described taxa from the genus Stipa to Nassella, Jarava or Pappostipa. As a result, 12 new combinations are here proposed: Jarava ichu var. pungens, Nassella brachyglumis, N. macrotricha, Pappostipa arenicola, P. choconen- sis, P. colloncurensis, P. frigida var. longifolia, P. jucunda, P. kieslingii, P. mapuche, P. marqueziana and P. zulmae. A key to identify the genera of Stipeae in Argentina is also included.

Flora

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NOVEDADES NOMENCLATURALES EN LA TRIBU STIPEAE (POACEAE, POOIDEAE)

Darwiniana, nueva serie (2010)

Ana M. Cialdella

During the revision of the Stipeae (Poaceae) for the Argentinean flora and in accordance to the latest phylogenetic studies in the tribe, it became necessary to transfer some recently described taxa from the genus Stipa to Nassella, Jarava or Pappostipa . As a result, 12 new combinations are here proposed: Jarava ichu var. pungens, Nassella brachyglumis, N. macrotricha, Pappostipa arenicola, P. choconensis, P. colloncurensis, P. frigida var. longifolia, P. jucunda, P. kieslingii, P. mapuche, P. marqueziana and P. zulmae . A key to identify the genera of Stipeae in Argentina is also included.

Stipa

Flora

10.14522/darwiniana.2014.482.16

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Comparison between external and internal standard calibration in the validation of an analytical method for 1‐hydroxypyrene in human urine by high‐performance liquid chromatography/tandem mass spectrometry

Rapid Communications in Mass Spectrometry (2006)

Daniela Pigini Ana M. Cialdella Paolo Faranda Giovanna Tranfo

Abstract 1‐Hydroxypyrene is a metabolite of pyrene, a member of the class of polycyclic aromatic hydrocarbons (PAHs) whose toxic properties in some cases include carcinogenicity. The determination of 1‐hydroxypyrene in human urine is used as a biological indicator for exposure to PAHs, which is related to the combustion of organic materials, like smoking, living in urban environments, and eating grilled or smoked food. The determination of 1‐hydroxypyrene by high‐performance liquid chromatography (HPLC) with fluorescence detection has very good sensitivity but it is not highly specific: this can reduce accuracy in the quantitative determination of low levels of analyte in a complex matrix like urine. An HPLC method that uses triple quadrupole mass detection has been validated with the objective both to improve the signal‐to‐noise (S/N) ratio and to achieve the maximum specificity for the analyte in those urine samples that are richer in possible inteferents. The calibration range for 1‐hydroxypyrene is from 0.005–0.1 µg/L in the urine of non‐smoking healthy volunteers. After solid‐phase extraction, samples were analyzed by HPLC/tandem mass spectrometry (MS/MS) in the multiple reaction monitoring (MRM) mode. In order to obtain reliable results quantitative analysis must be performed by means of the internal standard method (we used deuterium‐labelled 1‐hydroxypyrene): the method accuracy is not less than 85%. The S/N ratio at a concentration of 0.1 µg/L is about 10, and therefore this can be considered the lowest limit of quantitation. The method performance does not change if urine samples are measured using a calibration curve prepared in methanol, thus reducing the time of analysis and costs. Copyright © 2006 John Wiley & Sons, Ltd.

Internal standard

Matrix (chemical analysis)

10.1002/rcm.2407

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Mating system and population structure of Acacia aroma and A. macracantha (Fabaceae)

American Journal of Botany (2004)

Paola Vanesa Casiva Juan C. Vilardi Ana M. Cialdella Beatriz O. Saidman

Acacia aroma and A. macracantha are closely related species that inhabit northern and central Argentina. The reproductive barriers between them seem to be weak. They exhibit low genetic differentiation, high levels of interspecific gene flow, and extensive areas of sympatry. Isoenzymatic approaches were used to evaluate the population structure and mating system parameters in natural Argentine populations of A. aroma and A. macracantha and to provide new tools for the analysis of relationships between these two species. All studied populations had high levels of genetic variability and no significant departures from Hardy‐Weinberg expectations, but the two species did not differ from each other. Most variability occured within populations. Mating system analysis showed high levels of outcrossing, no biparental inbreeding, and a high probability that individuals within progeny arrays are full rather than half sibs. In all A. aroma and A. macracantha populations, polymorphic loci had the same allelic variants, and no geographic or genetic isolation between species was found. The results favor the hypothesis that these two entities represent a single polymorphic species rather than two distinct species.

Outcrossing

Reproductive isolation

Population Genetics

10.3732/ajb.91.1.58

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Citations (31)

TIPIFICACIONES EN NOTOTRICHE (MALVACEAE) PARA SUDAMÉRICA AUSTRAL

Darwiniana nueva serie (2019)

Ana M. Cialdella Nataly O’Leary

10.14522/darwiniana.2019.72.856

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REVISIÓN DE LAS ESPECIES DE AXONOPUS (POACEAE, PANICOIDEAE, PANICEAE), SERIE SUFFULTI¹^,²

Annals of the Missouri Botanical Garden (2006)

Ana M. Cialdella Osvaldo Morrone Fernando O. Zuloaga

The taxonomic revision of species of the genus Axonopus P. Beauv. series Suffulti G. A. Black is presented. This series includes perennial species, frequently growing in savannas and in grasslands, on argillaceous or sandy ground with rocky outcrops, at altitudes up to 3500 m. The plants are rhizomatous or stoloniferous, with conduplicate sheaths and narrowly linear to linear-lanceolate blades, flat to folded along their entire length, or open toward the apex. The inflorescences are exserted from the apex of the culms; they consist of spiciform racemes of variable number, mainly digitate. The rachis of each raceme is triquetrous, sinuous, with hispidulous angles, sometimes with long and rigid hairs. The upper lemma and the upper palea are indurate, dark brown, papillose, and shiny. Sixteen species are here considered within Axonopus series Suffulti, principally distributed in South America, with A. ciliatifolius Swallen and A. jeanyae Davidse endemic species of Belize and Panama, respectively. Description of morphological characters and microcharacters of the upper floret, a key to identify the species, descriptions, synonymy, geographical distribution, and illustrations of characters of taxonomic value are given. Finally, lectotypification of series Suffulti is established, and A. ramboi G. A. Black is included in A. argentinus Parodi as a synonym.

Raceme

Lemma (botany)

Apex (geometry)

Herbarium

10.3417/0026-6493(2006)93[592:rdleda]2.0.co;2

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Flora del Paraguay 23 Gramineae V, Paniceae. Acroceras-Panicum

Fernando O. Zuloaga Osvaldo Morrone Zulma E. Rúgolo de Agrasar Ana M. Antón Mirta Arriaga

Panicum

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Konsekuensi mekanisasi pertanian di Indonesia

Pusat Penelitian Agro-Ekosistem Faisal Kasryno Ana M. Cialdella Fernando O. Zuloaga

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Piptochaetium fuscum (Nees ex Steud.) Barkworth, Ciald., & Gandhi, a new combination replacing Piptochaetium setosum (Trin.) Arechav.

PhytoKeys (2014)

Mary E. Barkworth Ana M. Cialdella Kanchi N. Gandhi

A new name, Piptochaetium fuscum, is provided for a taxon hitherto known as Piptochaetium setosum (Trin.) Arechav. Morphological, anatomical, and molecular studies that argue against including Piptochaetium in Stipa, and hence use of S. purpurata (Phil.) Columbus & J.P. Sm., are cited.

10.3897/phytokeys.35.6622

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Evidence of local adaptation and stabilizing selection on quantitative traits in populations of the multipurpose American species Acacia aroma (Fabaceae)

Botanical Journal of the Linnean Society (2019)

Carolina L. Pometti Cecilia Bessega Ana M. Cialdella Mauricio Ewens Beatriz O. Saidman

Abstract Economically and ecologically important quantitative traits of Acacia aroma are related to life history and the size and shape of fruits and leaves. Substantial variation is observed for these traits in natural populations, suggesting a possible genetic basis that could be useful for selection programmes. Our objective was to detect signals of selection on 12 phenotypic traits in 170 individuals belonging to seven populations of A. aroma in the Chaco Region of Argentina. Phenotypic traits were compared with molecular markers assessed in the same populations. Here, we search for signatures of natural selection by comparing quantitative trait variation to neutral genetic variation through the PST–FST test. We further test for differences among populations for the 12 phenotypic traits, an association of phenotypic variation with environmental variables and geographical distance, and we compare the power of discrimination between the phenotypic and AFLP datasets. The PST–FST test suggested directional selection for tree height and stabilizing selection for the remaining traits. Analyses of variance showed significant differentiation for eight phenotypic traits. These results suggest selecting among provenances as a management strategy to improve tree height (which showed divergent selection), whereas significant genetic gain for the other traits might be obtained by selection within provenances.

Phenotypic trait

Trait

Stabilizing selection

10.1093/botlinnean/boz023

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Citations (7)