Alexandra Stoll

Alexandra Stoll
Centro de Estudios Avanzados en Zonas Áridas | CEAZA · Biologia terrestre

Dr. rer. nat.

About

41
Publications
11,281
Reads
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511
Citations
Citations since 2016
26 Research Items
414 Citations
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2016201720182019202020212022020406080100120
2016201720182019202020212022020406080100120
2016201720182019202020212022020406080100120
Introduction
My research is focussed on the plant-environment interaction, including biogeographical aspects and associated microorganisms. This interdisciplinary approach is based on the concept of the plant as a holobiont and aims to generate holistic research in plant and microbial ecology, including their interaction, in natural and agriculture ecosystems of arid zones.
Additional affiliations
August 2008 - July 2020
Centro de Estudios Avanzados en Zonas Áridas
Position
  • Principal Investigator
Description
  • Since 2008, I am a researcher at CEAZA, working on ecology and biogeography of desert plants. Since 2012, I lead the laboratory for Applied Microbiology at CEAZA, dedicated to the identification and characterization of root-associated microorganisms and communities, mechanisms involved in plant-bacteria interaction, and applications to agriculture in arid zones. Currently, both research areas are merged to generate a holistic approach to plant and microbial ecology in arid zones.
Education
August 2001 - May 2005
Technische Universität Dresden
Field of study
  • Biology

Publications

Publications (41)
Article
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Citation: Morales, P.; González, M.; Salvatierra-Martínez, R.; Araya, M.; Ostria-Gallardo, E.; Stoll, A. New
Article
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The post-Miocene climatic histories of arid environments have been identified as key drivers of dispersal and diversification. Here, we investigate how climatic history correlates with the historical biogeography of the Atacama Desert genus Cristaria (Malvaceae). We analyze phylogenetic relationships and historical biogeography by using next-genera...
Article
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Salinity has extensive adverse effects on plant growth and the development of new agronomic strategies to improve crop salt tolerance is becoming necessary. Currently, the use of plant growth promoting rhizobacteria (PGPR) to mitigate abiotic stress in crops is of increasing interest. The most analyzed mechanism is based on ACC deaminase activity,...
Article
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Many aspects regarding the role of lipopeptides (LPs) in bacterial interaction with plants are not clear yet. Of particular interest is the LP family of surfactin, immunogenic molecules involved in induced systemic resistance (ISR) and the bacterial colonization of plant surfaces. We hypothesize that the concentration of surfactin produced by a str...
Article
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During the last decades, the incorporation of beneficial microorganisms in agriculture crop management has become a common practice. Seed coating of these microorganisms still faces technical issues, which limit its implementation in conventional agriculture. An adaption to widely established agricultural practices, e.g. fertigation, could help to...
Article
In the present study, the antifungal activity of metabolites produced by Bacillus atrophaeus B5 and a new Brevibacterium strain against Alternaria alternata was evaluated. Assays in vitro and in vivo on tomato fruit during postharvest were made. Based on the 16S rDNA gene sequence analysis, the new strain (strain B7) was identified as Brevibacteriu...
Article
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The importance of phosphate solubilizing rhizobacteria (PSB) has been well-document as an option for enhancing sustainable agriculture. As a particular group of plant growth promoting rhizobacteria (PGPR), PSB play an important role in the soil phosphorus cycle, increasing the bioavailability for growth and plant development. This study analyses th...
Article
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Extreme arid conditions in the Atacama Desert in northern Chile have created a unique vegetation almost entirely restricted to the desert margins along the coast of the Pacific Ocean and the Andean range. In this study we provide data on the desert vegetation along elevational gradients at four localities from the western Andean slopes, between 19°...
Article
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Flowering desert (FD) events consist of the rapid flowering of a wide variety of native plants in the Atacama Desert of Chile, which is categorized as the driest desert in the world. While ephemeral plants are an integral part of the desert ecosystem, there is little knowledge on plant-microbe interactions that occur during FD events. Consequently,...
Article
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In a desert, plants as holobionts quickly respond to resource pulses like precipitation. However, little is known on how environment and plants modulate the rhizosphere-associated microbiome. As a model species to represent the Atacama Desert bloom, Cistanthe longiscapa (Montiaceae family) was selected to study the influence of abiotic and biotic e...
Article
In hyper-arid habitats vegetation tends to be highly patchy with individual plant populations set widely apart from each other. In the Atacama Desert of northern Chile, rainfall is essentially absent, but fog occurring both at the coast and sometimes reaching inland areas supports patches of vegetation in an otherwise barren environment. Tillandsia...
Article
Balsamocarpon brevifolium Clos (Fabaceae), an endangered endemic shrub of the Chilean Atacama Desert, nowadays occurs in fragmented populations, which are exploit since at least 200 years. Understanding its genetic diversity, population structure and distribution patterns are essential for conservation planning and sustainable management. Based on...
Article
The Atacama Desert in western South America is considered as one of the driest places on earth, but is nevertheless characterized by surprisingly high species richness and levels of endemism. The plant genus Cristaria (Malvaceae), with ca. 21 species, is one of the most diverse genera of the Atacama Desert, while the much less diverse sister genus...
Article
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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....
Article
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BACKGROUND Bell peppers consumption is recommended due their bioactive compounds content and their positive effects on health. Growth‐promoting rhizobacteria are popular due to their ability to promote plant growth by improving the fixation of nutrients or by inducing a systemic response. Green bell pepper (Capsicum annum) roots were inoculated wit...
Poster
Full-text available
The Atacama Desert, located on the western side of the Andes in northern Chile, harbours a range of endemic species adapted to hyperarid conditions. Vegetation is largely restricted to coastal fog oases and the Andean foothills, which are separated by a largely vegetation-free zone. Diversifications have been shown to be surprisingly recent in some...
Article
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An understanding of biocontrol activities is important when developing microorganism‐based alternatives to conventional fungicides. From our bacterial collection, we selected two strains (BBC023 and BBC047) for their outstanding antagonistic capacity against fungal phytopathogens and growth‐promoting abilities towards Arabidopsis thaliana. Accordin...
Article
A Gram-positive, fast-growing, endophytic bacterium was isolated from root nodules of Medicago polymorpha and identified as Bacillus megaterium. The isolate, named NMp082, co-inhabited nodules with the symbiotic rhizobium Ensifer medicae. B. megaterium NMp082 contained nifH and nodD genes that were 100% identical to those of Ensifer meliloti, an un...
Article
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Cistanthe longiscapa is an endemic annual herb and characteristic element of the Chilean Atacama Desert. Principal threats are the destruction of its seed deposits by human activities and reduced germination rates due to the decreasing occurrence of precipitation events. To enable population genetic and phylogeographic analyses in this species we p...
Article
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Sclerophyllous forest is among the most representative types of woody plant communities in central Chile where Quillaja saponaria is considered to be one of the most important species. In this study, we analysed the main factors that explain the geographical patterns of variation in composition, richness and phylogenetic diversity of woody plant co...
Conference Paper
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Supply and demand for ESs are often unevenly distributed in space, and the ability to derive robust, spatially explicit measures of both is therefore key to effective planning and management. In the case of ecotourism, optimal management strategies at a tourism destination are theoretically those that seek to align the use of ecotourism resources w...
Article
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• Premise of the study: Microsatellite primers were developed for the endemic Chilean tree Quillaja saponaria (Quillajaceae), a common member of the sclerophyllous Mediterranean forest, to investigate intraspecific patterns of genetic diversity and structure. • Methods and Results: Using an enriched library, 12 polymorphic microsatellite loci were...
Article
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While many developed countries have invested heavily in research on plant invasions over the last 50 years, the immense region of Latin America has made little progress. Recognising this, a group of scientists working on plant invasions in Latin America met in Chile in late 2010 to develop a research agenda for the region based on lessons learned e...
Article
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Background: Chile is committed to extending its National System of Protected Areas (NSPA), focusing on eco-regions whose ecosystems are currently under-represented in the NSPA. A newly proposed law aims to create a Service of Biodiversity and Protected Areas that would unify the terrestrial and marine systems. The proposed law would allow the inclu...
Article
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This issue of Plant Ecology & Diversity differs in content from what the reader is accustomed to. It provides a snap-shot of plant biology in Latin America and the Caribbean today, represented in a set of papers on botany – in its traditional sense of the discipline – and, in addition, on plant physiology, ecological interactions, invasive species...
Article
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The GLM herbarium collection houses vascular plant specimens from Namibia collected between 1909 and 1913 by Fritz Schäfer. Duplicates at Berlin-Dahlem (B) were partly destroyed during World War II, and further duplicates are known only in few cases at Zurich (Z) and Cape Town (NBG). At GLM we traced 27 type specimens of 20 validly published names,...
Article
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Se evaluó el nicho climático de 8 especies arbóreas endémicas de Chile (i.e., Beilschmiedia berteroana, B. miersii, Crinodendron patagua, Cryptocarya alba, Kageneckia oblonga, Lithraea caustica, Peumus boldus y Quillaja saponaria) formadoras del Bosque Esclerófilo Mediterráneo. Se utilizó el algoritmo de Máxima Entropía (MAXENT), con los datos de p...
Article
Aim Peperomia subgenus Tildenia consists of c. 60 species growing in seasonal habitats of Neotropical mountain areas from Mexico to Argentina. The subgenus can be split geographically, with almost equal diversity in the Northern Hemisphere (centred in Mexico and Guatemala) and in the Southern Hemisphere (centred in Peru and Bolivia). Only a few spe...
Article
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The giant moss Dendroligotrichum dendroides s.l. grows as self-supporting plants up to 40 cm in height in forest habitats in Chile and New Zealand. This moss represents one of the tallest self-supporting bryophytes. Biomechanical tests indicate that the stems can develop a high degree of stiffness (Young's modulus) via a dense hypodermal sterome th...
Article
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The perianthless Piperales, i.e. Saururaceae and Piperaceae, have simple reduced flowers strikingly different from the other families of the order (e.g. Aristolochiaceae). Recent molecular phylogenies proved Verhuellia to be the first branch in Piperaceae, making it a promising subject to study the detailed structure and development of the flowers....
Article
This article reports the finding of eleven plant species, typical to the temperate Chilean rainforests north of the Maule river, in the ravines of Estero La Puerta (35°19'02"S / 72°15'39"W) and Estero Infernillo (35°14'15" S / 72°10'20" W), within the Coastal Mountains of the VII Region, Chile. The Maule River today is assumed as a natural barrier...
Article
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The present article informs about the floristic-structural model of vegetation in the valley of Cayurranquil river, area of Cayurranquil (35º58’11’’ S / 72º38’25’’ W), Cauquenes, VII Region, Chile, so far unknown by literature. The number of vascular plant species was registered for 11 locations in spots of 100 m2. Then, the phytogeographical origi...
Article
Full-text available
The present article informs about the floristic-structural model of vegetation in the valley of Cayurranquil river, area of Cayurranquil (35°58'11'' S / 72°38'25'' W), Cauquenes, VII Region, Chile, so far unknown by literature. The number of vascular plant species was registered for 11 locations in spots of 100 m2. Then, the phytogeographical origi...
Article
Full-text available
This article reports the occurrence of three species of Hymenophyllaceae in the coast range of the Maule region in central Chile. The discovery of Hymenoglossum cruentum (Cav.) K. Presl., Hymenophyllum darwinii Hook.f. ex Bosch y Trichomanes exsectum Kunze at the Fundo San Pedro/ Las Cañas (35°29'S - 72°22'W) represents sizeable extensions of the k...
Article
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This note reports the finding of a small population of Nothofagus alpina (Poepp. et Endl.) Oerst. (Fagaceae) in the valley of Cayurranquil river (35°58'S, 72°39' W) extending the known distribution of this species into the coast ranges of the Maule region, Chile.

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Projects

Projects (6)
Project
CLAP general objective is to improve predictive capabilities of the sensitivity of the Coquimbo region socio-ecological system to climate change. It aims to generate local to mesoscale predictions of future climate change effects in the Coquimbo region by advancing current observational and modeling capabilities in geophysics (land-ocean- atmosphere) and ecology (marine and terrestrial). The integrated understanding of the bio-geophysical system will be used to predict coupled responses (ecological-evolutionary and socio-economic) to climate from a holistic approach taking the ocean-atmosphere processes as the main drivers of the pressure on the system. CLAP aims to fill knowledge gaps necessary to deliver science-based products for addressing the impacts of climate variability on targeted ecosystem services (ES). These ES are fish stocks and landing, aquaculture production, tourism and recreation, moderation of extreme events, carbon sequestration in the context of the sustainability and the carbon neutrality by assisting Chile to meet national and international compromises.
Project
Our aim is to explore the phytogeographic relationships between the coastal and Andean deserts of northern Chile and southern Peru. In particular we are focusing on a potential north-south corridor facilitating biotic exchanges between southern Peru and northern Chilea along the Andes. Additionally, we investigate on the distinctness of coastal and Andean desert vegetation in the northern Atacama Desert.
Project
The objective of the project is to pioneer the research on the mutual evolutionary relationships between Earth surface processes and biota https://sfb1211.uni-koeln.de/ https://gepris.dfg.de/gepris/projekt/268236062