María Isabel Mujica

María Isabel Mujica
Universidad Austral de Chile · Instituto de Ciencias Ambientales y Evolutivas

PhD

About

17
Publications
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Introduction
I study the ecology and evolution of mycorrhizal associations (the symbiosis between plant roots and soil fungi). Particularly, I am focused on orchid mycorrhizas. ------------------------------------------ Estudio la ecología y evolución de las asociaciones micorrícicas (simbiosis entre plantas y hongos). En particular, me he enfocado en estudiar las micorrizas de las orquídeas.

Publications

Publications (17)
Article
Full-text available
Echinopsis chiloensis is an endemic cactus from Chile, distributed in a temperature and rainfall gradient between 30 • and 35 • South latitude, with mean temperatures increasing and precipitation decreasing toward the north. It is the main host of the mistletoe Tristerix aphyllus, a holoparasite completely dependent on the cactus for water, carbon,...
Article
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Background As in most land plants, the roots of orchids (Orchidaceae) associate with soil fungi. Recent studies have highlighted the diversity of fungal partners involved, mostly within Basidiomycotas. The association with a polyphyletic group of fungi collectively called rhizoctonias (Ceratobasidiaceae, Tulasnellaceae and Serendipitaceae) is the m...
Article
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There were errors in the name of author László G. Nagy and in affiliation no. 31 in the original publication. The original article has been corrected.
Article
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Orchids produce small seeds with no energy reserves, relying entirely on orchid mycorrhizal fungi (OMF) for germination. This process, known as symbiotic germination, can lead to different outcomes depending on abiotic factors, such as nutrient availability. Previous studies have shown that nutrient addition has a negative effect on the outcome of...
Article
Full-text available
The cryptic lifestyle of most fungi necessitates molecular identiication of the guild in environmental studies. Over the past decades, rapid development and afordability of molecular tools have tremendously improved insights of the fungal diversity in all ecosystems and habitats. Yet, in spite of the progress of molecular methods, knowledge about f...
Article
Full-text available
Little is known about the soil factors influencing root-associated fungal communities in Orchidaceae. Limited evidence suggests that soil nutrients may modulate the association with orchid mycorrhizal fungi (OMF), but their influence on non-mycorrhizal fungi remains unexplored. To study how nutrient availability affects mycorrhizal and non-mycorrhi...
Article
Full-text available
Several species of the family Orchidaceae have limited distribution and small populations, in which the probability of extinction is much higher than in broadly distributed species. As orchid seeds are very small and lack energy reserves, they require association with compatible mycorrhizal fungi that provide nutrients and carbon needed for germina...
Article
Full-text available
Scientific interest in traditional and local knowledge (TLK) has grown in recent decades, because of the potential of TLK for improving management and conservation practices. Here, we synthesize and evaluate TLK studies in Chile, discuss how this progress compares to the international scientific literature in the field, and contextualize our result...
Preprint
Full-text available
Most of plant species have mycorrhizas, which can be classified in four types: Arbuscular (AM), Ecto (EM), Orchid (OM) and Ericoid Mycorrhiza (ER). Since the AM ancestral state, some plant lineages have switched partner (EM, OM and ER) or lost the association (NM). Evolutionary transitions to a novel mycorrhizal state (MS) might allow plant lineage...
Chapter
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One of the most important microorganisms in the soil are the mycorrhizal fungi; however, little research exists regarding mycorrhizal symbiosis on the South American Mediterranean-type ecosystem (MTE) – also commonly known as Chilean matorral. The aims of this chapter are to highlight and compile the existing and arising knowledge on mycorrhizal sy...
Article
Full-text available
Background and aims: Mycorrhizal associations are influenced by abiotic and biotic factors, including climate, soil conditions and the identity of host plants. However, the effect of environmental conditions on orchid mycorrhizal associations remains poorly understood. The present study examined how differences in soil nutrient availability are re...
Conference Paper
Full-text available
Background/Question/Methods The seeds of Orchidaceae are very small and lacking of energetic reserves, so they need to associate with mycorrhizal fungi for germination and early development. The requirement of find a compatible fungus to germinate can limit the distribution and abundance of orchids. In this way it is expected that orchids with sp...
Article
Full-text available
Aim In deserts, past climate change (and particularly past rainfall variability) plays a large role in explaining current plant species distributions. We ask which species were most and which were least affected by changes in rainfall during the late Quaternary in northernmost Chile.LocationQuebrada La Higuera (QLH; 18° S), a shallow canyon that cu...
Article
Full-text available
Morphologic evidence for the revalidation of Chloraea leptopetala. The family Orchidaceae has about 50 species from the region of Arica y Parinacota to the region of Magallanes. Chloraea cylindrostachya and Chloraea leptopetala were synonymized by Correa (1969), who considered that the last was a juvenile of the first. This paper reports the resul...
Conference Paper
Full-text available
Los bosques nativos de Chile, debido a su diversidad, composición y estructura, cumplen numerosas e importantes funciones ecológicas, culturales, económicas y sociales; tales como provisión de recursos hídricos, fuentes de energía y protección de la biodiversidad. No obstante, en décadas recientes, la cobertura de bosque nativo de la zona norte de...

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Projects

Projects (3)
Project
To describe, for the very first time, patterns of diversity and distribution of AMF present in the soil and in the roots of plants of a sclerophyll forest in the central zone of Chile and how those ecological patterns are affected by host plant species, soil physicochemical factors and seasons of the year. For this aim I use classical morphological and molecular approaches of AMF to describe diversity.