Daniela Seelenfreund

• PhD
• University of Chile

Este artículo presenta una visión general de la importancia cultural, a nivel global, de especies vegetales utilizadas como fuentes de fibra para la elaboración de textiles. La familia de las moraceae incluye diversas especies menos conocidas utilizadas para la fabricación de textiles. Las nuevas herramientas genéticas permiten estudiar objetos ela...

[This corrects the article DOI: 10.1371/journal.pone.0298896.].

ABSTRACT Grapevines (Vitis vinifera L.), together with other fruit crops, were introduced on multiple occasions to Rapa Nui (Easter Island) after its European discovery, as early as 1821. Today, viticulture arises as a new innovative economic resource for Rapa Nui, and therefore, understanding which genotypes were introduced and their origin become...

Starch residue analysis was carried out on stone tools recovered from the bottom layer of the Anakena site on Rapa Nui (Easter Island). These deposits have been dated to AD 1000–1300 AD and so far, represent the earliest evidence of human settlement on this island. Twenty obsidian tools were analyzed. Analysis of 46 starch grains recovered from 20...

Broussonetia papyrifera (L.) L.’ Hér. ex Vent. o morera de papel es la especie menos común y la más desconocida de la familia de las Moráceas en Chile. En tres parques de la capital, Santiago, existen algunos ejemplares cultivados como ornamentales. Se trata de una especie originaria del este y del sureste de Asia que fue dispersada por acción antr...

Glucokinase (GCK) is the pancreatic β‐cell glucose sensor, and its kinetics are key to that purpose. A slow transition step, displayed as non‐hyperbolic kinetics, and a low affinity for glucose characterize GCK. Mutations in GCK associated with maturity‐onset diabetes of the young type 2 (MODY2) usually reduce the functionality of the human pancrea...

Ceriporiopsis subvermispora is a white-rot fungus with a high specificity towards lignin mineralization when colonizing dead wood or lignocellulosic compounds. Its lignocellulose degrading system is formed by cellulose hydrolytic enzymes, manganese peroxidases, and laccases that catalyze the efficient depolymerization and mineralization of lignocel...

Background: Ceriporiopsis subvermispora is a white-rot fungus that displays a high specificity towards lignin mineralization when colonizing dead wood or lignocellulosic compounds. The lignocellulose degrading system from C. subvermispora is formed by genes that encode cellulose hydrolytic enzymes, manganese peroxidases, and laccases that catalyze...

Humans introduced paper mulberry (Broussonetia papyrifera) from Taiwan into the Pacific over 5000 years ago as a fiber source to make barkcloth textiles that were, and still are, important cultural artifacts throughout the Pacific. We have used B. papyrifera, a species closely associated to humans, as a proxy to understand the human settlement of t...

Anthropogenic volatile organic compounds (AVOCs) represent the third largest contribution in gaseous emissions in the urban and peri-urban region of Santiago, the capital of Chile. Some of these compounds are toxic or mutagenic, cause serious damage to human health, and decrease plant growth and development. There is little international informatio...

Paper mulberry, Broussonetia papyrifera (L.) L’Hér. ex Vent. (Moraceae), a dioecious species, was transported by humans from Taiwan to the islands of Remote Oceania. Its introduction and cultivation in Remote Oceania was intentional due to its cultural importance as a fiber source for barkcloth textiles. The aim of this study was to explore the gen...

Paper mulberry, Broussonetia papyrifera (L.) L'Hé r. ex Vent. (Moraceae), a dioecious species , was transported by humans from Taiwan to the islands of Remote Oceania. Its introduction and cultivation in Remote Oceania was intentional due to its cultural importance as a fiber source for barkcloth textiles. The aim of this study was to explore the g...

The Prosopis genus (Mimosoideae, Leguminosae) constitutes an important genetic resource for arid and semiarid environments. Prosopis chilensis (Molina) Stuntz is a multipurpose species native to South America, which displays high phenotypic variability. In Chile, this species grows in the semiarid region, along river beds of the transverse valleys....

We report a 21 years old woman, without offspring, with diabetes mellitus diagnosed at 17 years of age, without ketosis or weight loss. Her body mass index was 18 kg/m2. Her C peptide was normal (2.3 ng/ml) and diabetes mellitus type 1 autoantibodies were negative. A monogenic diabetes Maturity Onset Diabetes of the Young (MODY) was proposed. Her f...

The chapter describes the history and biology of paper mulberry and its historic relationship with humans both in its native habitat in Asia and in the Pacific, where it was introduced in prehistoric times. The chapter summarizes the botanic features of the plant and results of recent genetic studies. It also refers to the ethnobotnay of this plant...

Premise of the study: Broussonetia papyrifera (Moraceae) is native to Asia and is used as a medicinal plant and as a source of fiber for making paper. It was dispersed into the Pacific region as a fiber source for making nonwoven textiles (barkcloth). Microsatellites were developed to trace the human-mediated dispersal of this species into the Paci...

Background and Aims Paper mulberry or Broussonetia papyrifera (L.) L’Hér. ex Vent. (Moraceae) is a dioecious species native to continental South-east Asia and East Asia, including Taiwan, that was introduced to the Pacific by pre-historic voyagers and transported intentionally and propagated asexually across the full range of Austronesian expansion...

Bark cloth (‘tapa/kapa’) is a fabric made from beaten plant fibres. In the Pacific tapa made of paper mulberry has been of great cultural importance and its use is associated with both utilitarian and ceremonial contexts. In the 19th century, traditional bark cloth was largely replaced by Western cloth. On some islands, tapa making was banished wit...

[This corrects the article DOI: 10.1371/journal.pone.0161148.].

Background Paper mulberry (Broussonetia papyrifera (L.) L'Hér. ex Vent) is a dioecious tree native to East Asia and mainland Southeast-Asia, introduced prehistorically to Polynesia as a source of bark fiber by Austronesian-speaking voyagers. In Oceania, trees are coppiced and harvested for production of bark-cloth, so flowering is generally unknown...

Sequence of the male marker region. Bold and italics: primers designed for this study; underlined: primers designed by Wang et al. (30). (TIF)

List of herbarium samples used in the present study. (DOCX)

List of contemporary plant material used in the present study. (DOCX)

Correlación entre la especialización metabólica, uso de codones y adaptación al pool de tRNA en el sistema ligninoli co de Ceriporiopsis subvermispora (Correla on between metabolic specializa on, codon preference and adpata ón to tRNA pool in the the ligninoly c genes from Ceriporiopsis subvermispora) Gonzalez, Josue4,5.,Gil, Carlos4.,Corsini, Gino...

Significance Paper mulberry, a common East Asian tree used for paper making, is propagated across the Pacific for making barkcloth, a practical and symbolic component of Austronesian material culture. Using chloroplast DNA sequences, we demonstrate a tight genealogical link between its populations in South China and North Taiwan, and South Taiwan a...

Broussonetia papyrifera (L.) Vent. (Moraceae), or paper mulberry, is a species of cultural importance in South East Asia, East Asia and the Pacific. Originally from mainland South East Asia or East Asia, this plant was introduced into the Pacific range by prehistoric Austronesian voyagers. We used non-coding internal transcribed spacer (ITS) sequen...

Paper mulberry has been used for thousands of years in Asia and Oceania for making paper and bark-cloth, respectively. Museums around the world hold valuable collections of Polynesian bark-cloth. Genetic analysis of the plant fibers from which the textiles were made may answer a number of questions of interest related to provenance, authenticity or...

Efficient lignin depolymerization is unique to the wood decay basidiomycetes, collectively referred to as white rot fungi. Phanerochaete chrysosporium simultaneously degrades lignin and cellulose, whereas the closely related species, Ceriporiopsis subvermispora, also depolymerizes lignin but may do so with relatively little cellulose degradation. T...

Efficient lignin depolymerization is unique to the wood decay basidiomycetes, collectively referred to as white rot fungi. Phanerochaete chrysosporium simultaneously degrades lignin and cellulose, whereas the closely related species, Ceriporiopsis subvermispora, also depolymerizes lignin but may do so with relatively little cellulose degradation. T...

We investigated two single nucleotide polymorphisms of the NOS3 gene in type 2 diabetic patients (n=93) and healthy non-diabetic controls (n=76) and their relationship with smoking habits, body mass index, hypertension and dyslipidemia. Results showed that eNOS polymorphism rs891512 (G24943A) is associated with hypertension in Chilean individuals (...

Broussonetia papyrifera (L.) Vent. (Magnoliophyta: Urticales), or paper mulberry, is a species of Asian origin dispersed by humans throughout the Pacific. Our aim is to evaluate the genetic variability of this plant in order to determine its potential as a commensal species for studying the mobility and/or migratory movements of the people that car...

Paper mulberry ( Broussonetia papyrifera (L.) Vent.) was one of the most widely distributed crop species in prehistoric Oceania, occurring from continental East Asia to the Polynesian islands. Its broad distribution is largely due to human-mediated dispersal during colonization of the islands of Near and Remote Oceania. We explore the potential for...

We present the analysis of an intronic polymorphism of the nephrin gene and its relationship to the development of diabetic nephropathy in a study of diabetes type 1 and type 2 patients. The frequency of the single nucleotide polymorphism rs#466452 in the nephrin gene was determined in 231 patients and control subjects. The C/T status of the polymo...

In this work, we explore the use of the unbiased cDNA–AFLP strategy to identify genes involved in Mn2+ homeostasis in Ceriporiopsis subvermispora. In this ligninolytic white-rot fungus, whose genome has not yet been sequenced, three Mn peroxidase genes responding to Mn2+ have been characterized. Using cDNA–AFLP to identify transcript-derived fragme...

Diabetic nephropathy (DN) is one of the major complications of type 2 diabetes and is associated with coronary disease. Nephrin, a protein mainly expressed in glomeruli, is decreased in DN and other kidney diseases. Since insulin levels are misregulated in type 2 diabetes, a possible connection between DN and its decreased nephrin expression could...

Genetic analyses of the lignin-degrading fungus Ceriporiopsis subvermispora is complicated by a dikaryotic nuclear condition and the absence of spore forms. Previous investigations had identified a family of closely related sequences encoding manganese peroxidase (MnP), but the relationship between genes and allelic variants could not be experiment...

Genetic analyses of the lignin-degrading fungus Ceriporiopsis subvermispora is complicated by a dikaryotic nuclear condition and the absence of spore forms. Previous investigations had identified a family of closely related sequences encoding manganese peroxidase (MnP), but the relationship between genes and allelic variants could not be experiment...

Amplified Fragment Length Polymorphism (AFLP) analysis is an efficient ADN finger printing method based on selective amplification using PCR of restriction fragments from a total digest of genomic DNA. The AFLP technique was developed primarily to reveal the differences between cultivars of plant species(1) and has been applied to several crops. AF...

Traditional identification of peach and nectarine varieties relies on the assessment of agronomic traits of the adult plant. This leads to a significant delay of time, constraints to breeders in the surveillance of germplasm and a risk for fruit growers and exporters. We describe a method for rapid assessment of peach and nectarine varieties based...

A light-dependent bleaching of plastids was induced in lemon seedlings through cultivation in the presence of the herbicide Norfluorazon (NFZ). Also, etiolated seedlings were obtained by cultivation under continuous dark conditions. When both types of seedlings were challenged with Alternaria alternata conidia, they were unable to induce phenylalan...

Citrus limon seedlings respond to fungat attack inducing the phenylpropanoid pathway producing phytoalexins. The de nero synthesis of one of the main enzymes, phenylalanine ammonia-lyase (PAL), is accomplished after 24 hours inoculation with Alternaria aIternata, or after 3 - 4 hours in response to elicitors. The transduction of these signals requi...

A light-dependent bleaching of plastids was induced in lemon seedlings through cultivation in the presence of the herbicide Norfluorazon (NFZ). Also, etiolated seedlings were obtained by cultivation under continuous dark conditions. When both types of seedlings were challenged with Alternaria alternata coni-dia, they were unable to induce phenylala...

Plant defense against pathogens involves mechanisms that include the expression of several genes, which could be located in any of the three compartments that contain genomes in plant cells: nuclei, mitochondria and chloroplasts. To transfer defense genes against pathogen attack from resistant to sensitive plants, it is desirable to know in which g...

Antibodies raised against Trichoderma harzianum conidia prevented accumulation of Phenylalanine ammonia-lyase (PAL, E.C. 4.3.1.5.) in Citrus. The observed effect of the antibodies is produced by a delay in the formation of the fungal germination tube. An increase of PAL activity of ca. 7 fold in C. limon and C. sinensis seedlings, and of ca. 2 fold...

The actinomycete Streptomyces viridosporus attacks wheat lignocellulose releasing soluble lignin-rich fragments (APPL). Chemical analyses indicated that these APPL contain 20% less guaiacyl and 70% less glucose residues than the original substrate. In order to determine the effect of non-filamentous bacteria on APPL, natural isolates were selected...

The ability of the lignino-cellulolytic actinomyceteStreptomyces viridosporus T7A to attack purified fractions of kraft lignin was examined. In the presence of 0.3% yeast extract, high-molecular weight kraft lignin (MW>3000, ether-insoluble fraction) does not affect growth of this microorganism significantly, whereas low-molecular weight kraft lign...

The ability of bacterial strains to metabolize lignin model compounds was studied. Strains examined were non-filamentous bacterial isolates obtained from decaying wood and the actinomycete Streptomyces viridosporus T7A. Model compounds included dimers containing either the beta-1 (1,2-diarylethane) or the beta-O-4 (arylglycerol-beta-aryl ether) typ...

The ability of the ligninolytic actinomycete Streptomyces viridosporus T7A to degrade selected lignin model compounds, both in the presence and in the absence of lignocellulose, was examined. Compounds studied included benzyl alcohols and aldehydes, plus dimers possessing intermonomeric linkages, which are characteristic of the lignin macromolecule...

The lignolytic capacity of some natural bacterial isolates was examined. Strains were selected from samples of decaying wood by growth in a minimal medium containing aromatic compounds with a structural relationship to lignin as the sole carbon sources. These included derivatives of benzoic and phenylpropanoic acids, as well as a mixture of low mol...

The Polynesian-introduced paper mulberry (Broussonetia papyrifera) is used in a preliminary study as a proxy for reconstructing human colonization patterns in Oceania with emphasis on the migration route towards Easter Island. B. payrifera was chosen because its economic and ritual importance in the past for the manufacture of bark cloth and it can...