Jorge Chiapella

Jorge Chiapella
National Scientific and Technical Research Council | conicet · INIBIOMA Instituto de Investigaciones en Biodiversidad y Medio Ambiente

About

58
Publications
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624
Citations
Introduction
I work at the Argentina's Research Council (CONICET). My main interest is the study of evolution of grasses, mainly Deschampsia but other BEP clade genera will be soon included. I have done morphology, Sanger sequencing, and now I am doing High-Throughput Sequencing (Illumina). I have also worked with Gymnocalycium (Cactaceae) and Tillandsia (Bromeliaceae). Last, but not least, I am also interested in the study of the plant biodiversity of Argentina, something which can be done only by means of extremely old-fashioned methods: taxonomical revisions and studies with herbarium specimens and Floras. I can get no funding for this, but a lot of satisfaction. Twitter @JorgeChiapella

Publications

Publications (58)
Article
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We studied the genetic diversity and structure of the Tillandsia capillaris complex, a morphologically diverse group of highly specialized epiphytes, across the distribution range in arid mountain regions of central Peru, Chile, Bolivia and central Argentina. To elucidate the phylogenetic relationships in the complex and to explore the taxon bounda...
Article
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Unlike the Arctic flora, with many flowering plant species offering opportunities to study evolutionary processes, the Antarctic flora offers only two. One of them is the Antarctic grass Deschampsia antarctica E. Desv., whose distribution spans from northern Patagonia (ca. 38°S) down to Alamode Island (ca. 68°S), in the west side of the Antarctic P...
Article
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Premise of the study: The South American genus Gymnocalycium (Cactoideae-Trichocereae) demonstrates how the sole use of morphological data in Cactaceae results in conflicts in assessing phylogeny, constructing a taxonomic system, and analyzing trends in the evolution of the genus. Methods: Molecular phylogenetic analysis was performed using pars...
Article
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In the North American Arctic, the existence of one or several taxa closely related to Deschampsia cespitosa var. cespitosa has remained a puzzle for many years. Extreme morphological variation, lack of clear limits between alleged forms, and an extended geographic range often render identification keys incomplete, and raise the question of how many...
Article
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Introducción y objetivos: La introducción de plantas exóticas para uso ornamental representa un riesgo de invasión para los ecosistemas. Cenchrus advena, C. longisetus y C. setaceus son gramíneas introducidas como ornamentales y altamente cultivadas en el centro-norte de Argentina, aunque se desconoce su estado en el proceso de invasión. En este tr...
Article
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The grass Deschampsia cespitosa is a variable taxon out of which many varieties, subspecies and endemic species have been separated. In this paper, the variation in genome size (GS) and ploidy of this grass including several of its subspecies and two related species in Eurasia was investigated by flow cytometric (FCM) measurements. GS and ploidy da...
Article
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Deschampsia antarctica is one of the two native vascular plants present in the Antarctic continent. More than half of its genome is composed of repetitive DNA. The present work aims to study the amount, composition and chromosomal localization of the main retroelements in the genome of D. antarctica, via a bioinformatic analysis and cytogenetic app...
Article
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The contrasting evolutionary histories of endemic versus related cosmopolitan species provide avenues to understand the spatial drivers and limitations of biodiversity. Here, we investigated the evolutionary history of three New Zealand endemic Deschampsia species, and how they are related to cosmopolitan D. cespitosa. We used RADseq to test specie...
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Diverse families of satellite DNA (satDNA) were detected in heterochromatin regions of Deschampsia. This kind of repetitive DNA consists of tandem repeat sequences forming big arrays in genomes, and can contribute to lineages differentiation. The differentiation between types of satDNA is related to their sequence identity, the size and number of m...
Preprint
Full-text available
Citation: Chiapella JO, Xue Z-Q, Greimler J (2021) The genus Deschampsia and the epithet "alpina". PhytoKeys 181: 95-103. https://doi. Abstract The epithet "alpina" has been recurrently used in the genus Deschampsia to name plants located in northern regions of Europe, Asia and North America, as a species (Deschampsia alpina (L.) Roem. & Schult.),...
Article
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Introducción y Objetivos: Las montañas concentran gran parte de la biodiversidad del planeta y brindan importantes beneficios al ser humano. Con el objetivo de generar una herramienta clave para el manejo sostenible de los ecosistemas de montaña de Córdoba, nos propusimos presentar una lista exhaustiva de plantas vasculares y sus rangos altitudinal...
Article
Deschampsia P. Beauv. is a cosmopolitan grass genus, which grows in cold and temperate regions, including about 15 species growing in South America and Antarctica. The species delimitation is difficult due to the high phenotypic plasticity and the likely occurrence of hybridization which generates species complexes with high morphological affinity....
Article
Repetitive DNA is a rapidly evolving component of vascular plant genomes, which can account for genomic differentiation in plant lineages. Satellite DNA (satDNA) is tandem repetitive DNA for which array size and disposition on chromosomes may vary between reproductively isolated groups, such as different populations or closely related species. Desc...
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We studied the epiphytic species Tillandsia capillaris and T. virescens that grow as neotenic forms with autogamous and cleistogamous flowers. They have expanded in Andean mountain environments, where they grow sympatrically across most of their ranges in arid regions of Peru, central-western Bolivia and north-central Argentina and Chile. We studie...
Article
Because of systematic sampling campaigns in the northern Patagonian Nothofagaceae forests of Argentina, several specimens of sequestrate fungi were collected. Some of those collections showed phylogenetic affinities and morphological similarities to members of the formerly recognized sequestrate genus Thaxterogaster, currently a synonym of Cortinar...
Article
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Plastid genome analysis of non-model organisms provides valuable information for basic research e.g., molecular evolutionary genomics, phylogeny and phylogeography. Deschampsia cespitosa is the most widespread species of the genus and it is a common grass that is found across Eurasia and North America. Scattered populations in regions of appropriat...
Article
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The glacier retreat in the Antarctic Peninsula is opening new ice-free areas and providing an excellent opportunity to study successional processes. Antarctic terrestrial ecosystems have the particular characteristic of being dominated almost exclusively by lichens and mosses. The aim of the present study was to analyze the diversity, cover and com...
Article
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Deschampsia antactica E. Desv. is one of the only two native vascular plants of Antarctica, having a disjunct distribution with South America. Its presence in different environmental conditions turns it into an interesting evolution model, particularly for genomic evolutionary studies. The repetitive DNA is a genome component that cause important c...
Article
The Antarctic lichen Cetraria subscutata is a synonym of Nephromopsis chlorophylla - Volume 50 Issue 2 - A. PASSO, J. M. RODRÍGUEZ, J. O. CHIAPELLA, M. I. MESSUTI
Article
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Deschampsia antarctica is the only grass naturally occurring in Antarctica, and it is also indigenous to southern South America. We aimed to evaluate patterns of within-population genetic diversity and between the focal areas Patagonia and Antarctica by using 144 sequences of nuclear internal transcribed spacer and non-coding plastid regions. We an...
Article
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Most vegetation descriptions tacitly assume that floristic composition and physiognomy are tightly linked. However, both vegetation properties may not respond in a similar way to environmental and disturbance gradients, leading to uninformed management planning and difficulties when attempting to restore degraded ecosystems. In this context, we add...
Article
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Northern North American populations of Deschampsia P. Beauv. (Poaceae) present many taxonomic and nomenclatural problems resulting from: 1) morphologic clinal variation across the continent; and 2) overlap in taxonomic use of specific and/or infraspecific epithets that are also used in European or Russian plants. The new name D. cespitosa (L.) P. B...
Article
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A new species of Lecanora, L. flavocrassa, is described from the Antarctic region. Additionally, L. stenotropa is registered for the first time from Antarctica and the distribution range of L. intricata is extended to the Antarctic Peninsula. A key to the species of Lecanora from Antarctica that contain usnic acid as secondary metabolite is present...
Article
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The Sierra de Famatina System is one of the main areas of endemism within the Southern Cone, as well as one of the main diversity hotspots of Argentina. We present here the first checklist for Sierra de Famatina, which includes 909 taxa (species, subspecies, varieties and forms) of vascular plants from 77 families and 358 genera. Sixty-eight are ne...
Article
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Recent collections from King George Island, Deception Island and the Antarctic Peninsula provide evidence of the presence of previously unrecorded lichen taxa in the Antarctic flora. Parmelia sulcata, previously cited for South Georgia, and Usnea neuropogonoides are recorded for the first time from maritime Antarctica. The distributions of Psoroma...
Article
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Plant disjunctions have provided some of the most intriguing distribution patterns historically addressed by biogeographers. We evaluated the three hypotheses that have been postulated to explain these patterns [vicariance, stepping-stone dispersal and long-distance dispersal (LDD)] using Munroa, an American genus of grasses with six species and a...
Article
Plant disjunctions have provided some of the most intriguing distribution patterns historically addressed by biogeographers. We evaluated the three hypotheses that have been postulated to explain these patterns [vicariance, stepping-stone dispersal and long-distance dispersal (LDD)] using Munroa, an American genus of grasses with six species and a...
Article
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The South American Transition Zone (SATZ) is a biogeographic area in which not only orog-eny (Andes uplift) and climate events (aridification) since the mid-Miocene, but also Quater-nary glaciation cycles had an important impact on the evolutionary history of the local flora. To study this effect, we selected Munroa argentina, an annual grass distr...
Article
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We compiled a checklist with all known endemic plants occurring in the Sierras of Córdoba and San Luis, an isolated mountainous range located in central Argentina. In order to obtain a better understanding of the evolutionary history, relationships and age of the regional flora, we gathered basic information on the biogeographical and floristic aff...
Article
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In this paper we describe three new species of the genus Deschampsia from the Russian Far East (Kamchatka, Khabarovskii Krai, Magadanskaya Oblast' and Commander Islands) and from Yakutia. For two species the chromosome numbers are revealed. K e y w o r d s :
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The ever increasing number of computer programs developed for phylogenetic research does not necessarily facilitate the construction of biologically relevant phylogenies. Regardless of the algorithm utilized by new software, the vast majority result in treelike graphs. We suggest that a new, more inclusive framework for phylogenetic studies needs t...
Article
The ever increasing number of computer programs developed for phylogenetic research does not necessarily facilitate the construction of biologically relevant phylogenies. Regardless of the algorithm utilized by new software, the vast majority result in treelike graphs. We suggest that a new, more inclusive framework for phylogenetic studies needs t...
Article
Full-text available
The proper delimitation of plant species is far away from being an issue restricted to debate among professional botanists. Topics like teaching and communication about biodiversity, ecological and biogeographical research, and conservation and management of biological resources all depend on the precise identification of species. The more precisel...
Article
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Munroa is a morphologically heterogeneous American genus of grasses, including five species with disjunct distribution in North and South America. Dasyochloa is a monotypic grass genus, common in western North America, with a controversial taxonomic position, because it has been alternatively included in Erioneuron, Koeleria, Triodia, and Uralepis....
Article
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Si bien el Chaco Serrano constituye una de las principales unidades fitogeográficas de la provincia de Córdoba, son escasos y restringidos los relevamientos florísticos disponibles. Por ello, en este trabajo se analiza la composición florística del Chaco Serrano entre los 400 y 1700 m.s.m. A lo largo de los cuatro cordones montañosos que lo compone...
Article
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A revision of the species of Deschampsia P. Beauv., Avenella (Bluff & Fingerh.) Drejer, and Vahlodea Fr. (Poaceae, Poeae, Airinae) present in South America is given. Fifteen species of Deschampsia and two monospecific genera segregated from Deschampsia—Avenella and Vahlodea—are found in the Andes of Argentina and Chile south of 30uS, typically in h...
Article
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A reconstruction of the phylogeny of the genus Gymnocalycium based on molecular information is presented, and its consequences on previously published infrageneric classification systems is discussed. The results of this study constitute important evidence in favour of a classification system of the genus largely based on the morphology of the seed...
Article
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Somatic chromosome counts were made for 13 plant species from Argentina, including eight species of Poaceae, and one for Asteraceae, Boraginaceae, Caesalpiniaceae, Mimosaceae, Solanaceae. For two species of Poaceae — Agrostis inconspicua Kunze ex E. Desv. (2n = 28) and Poa chonotica Phil. (2n = 42), the chromosome numbers are reported here for the...
Article
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Deschampsia setacea (Hudson) Hackel is a slender grass described originally as Aira setacea Hudson on a plant collected in Stratton Strawless (Norfolk) in the first edition of the Flora Anglica. It has never been typified, and since the herbarium of Hudson has been lost to fire, a neotype is chosen in order to preserve the current application of th...
Article
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The change of circumscription of Jarava (Stipeae) from a morphologically homogeneous section with nine species of the genus Stipa to a heterogeneous genus of ca. 60 species is criticized because of the lack of DNA data to support the change. The modification is considered inconvenient in terms of the ICBN article 14.1 on disadvantageous strict appl...
Article
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The circumscription and phylogeny of Deschampsia were studied for the first time by parsimony analysis of nuclear ribosomal internal transcribed spacer (ITS) and plastid trnL intron sequences. The traditional sectional division based on morphology was not supported by sequence data, which showed differences between core Deschampsia s.str. (mainly r...
Article
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The Deschampsia cespitosa complex in Russia is revised. Related taxa common to Russia and adjacent regions (i.e. northern Europe, Arctic America and Japan) are also considered. Deschampsia cespitosa s.l. is characterized by open to less commonly rather contracted panicles, spikelets (1) 2 (3)-flowered, 4-toothed lemmas with the lateral teeth larger...
Article
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Fifty-four exomorphological characters were recorded from 130 herbarium specimens belonging to Deschampsia cespitosa (L.) P. Beauv. subsp. cespitosa, D. alpina (L.) Roem. et Schult, D. bottnica (Wahlenb.) Trim, D. cespitosa subsp. glauca (Hartm.) C. Hartm., D. littoralis (Gaudin) Reuter, D. cespitosa subsp. parviflora (Thuill.) K. Richter and D. wi...
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Se da una breve descripción de la flora vascular del Parque Provincial Tromen con una lista de especies y altitudes a las que se encontraron. En el área de este Parque se coleccionaron un total de 230 especies, principalmente de las familias Compositae, Gramineae y Leguminosae. La flora del Parque Provincial Tromen refleja en su composición a las p...
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div>Se registra por primera vez en la Argentina la presencia de Lobelia aquatica Cham., L. hassleri Zahlbr. y L. nummularioides Cham. var. prostrata (Zahlbr.) E. Wimm., dos especies encontradas anteriormente sólo en la provincia de Misiones, están ahora registradas para Corrientes. La presencia de L. nana L. H.B.K. var. nana en la Argentina también...

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Project (1)
Project
We are studying aspects of genome evolution in South American and Antarctic species of Deschampsia, using cytogenetic and molecular tools. We aim at recognizing genetic mechanisms involved in the geographical differentiation of populations, as well as the recognition of genetic markers to delineate species, and to determine the presence of natural hybrids. The objectives can be summarized as 1) Analyze general characteristics of species Deschampsia karyotype (chromosome number and structure, heterochromatin, rDNA distribution); 2) Determine the kinship and geographic relationships among taxa, particularly among populations of D. antarctica inhabiting Antarctica and the South American continent; 3) Isolate and map highly repetitive DNA sequences, to find new species-specific chromosomal markers and / or group-specific; 4) Use GISH and FISH techniques to evaluate the origin of Deschampsia allopolyploids, and evaluate possible natural hybrids and parental species; 5) Establish a framework of phylogenetic relations between the South American species of Deschampsia from DNA sequences (nuclear and plastid); 6) Determine the probability of chromosomal ancestry of characters based on phylogenetic relationships.