Mario X. Ruiz-González

Mario X. Ruiz-González
Universitat Politècnica de València | UPV · Institute for the Preservation and Improvement of Valencian Agro-diversity (COMAV)

Ph. D., M. Sc.

About

37
Publications
8,100
Reads
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845
Citations
Introduction
y main research interest is the EVOLUTIONARY ECOLOGY OF BIOTIC INTERACTIONS. I work in two complementary areas that contribute to the understanding and development of my field: 1) the ecological factors affecting the evolutionary dynamics of single and interacting species, and 2) the molecular mechanisms that facilitate the stability of the interactions between species. Nowadays, I further integrate my experience with agronomy to address relevant societal problems such as agronomic sustainabilit
Additional affiliations
July 2019 - December 2019
Universidad Técnica Particular de Loja
Position
  • Lecturer
Description
  • Researcher and Lecturer
March 2016 - April 2017
Universidad Técnica Particular de Loja
Position
  • Senior Researcher
Description
  • Researcher and lecturer
April 2014 - April 2015
Universidad Técnica de Machala
Position
  • PROMETEO - SENESCYT, Senior Researcher
Education
September 2002 - June 2007
Trinity College Dublin
Field of study
  • Zoology
September 2000 - December 2002
University of Valencia
Field of study
  • Genetics

Publications

Publications (37)
Article
Full-text available
The use and conservation of agrobiodiversity have become critical to face the actual and future challenges imposed by climate change. Collecting phytogenetic resources is a first step for their conservation; however, the genetic material must be analysed to understand their potential to improve agricultural resilience and adaptation to the new clim...
Article
Full-text available
Living in a social group increases the risks of parasitism, especially in highly-related groups. In homogenous groups, with no reproductive division of labour, the impact of parasitism is unlikely to vary with host identity. Many social systems, however, do exhibit division of reproductive labour, most famously in social insects with their reproduc...
Article
Full-text available
Ant-associated microorganisms can play crucial and often overlooked roles, and given the diversity of interactions that ants have developed, the study of the associated microbiomes is of interest. We focused here on specialist plant-ant species of the genus Allomerus that grow a fungus to build galleries on their host-plant stems. Allomerus-inhabit...
Article
Full-text available
Comparison of the proteins of thermophilic, mesophilic, and psychrophilic prokaryotes has revealed several features characteristic to proteins adapted to high temperatures, which increase their thermostability. These characteristics include a profusion of disulfide bonds, salt bridges, hydrogen bonds, and hydrophobic interactions, and a depletion i...
Article
Full-text available
Changing climatic conditions impose a challenge both to biodiversity and food security. The effects of climate change affect different aspects of the plant or crop, such as morphological and phenological aspects, as well as yield. The effects of greenhouse conditions might be comparable in some cases to a permanent extreme disturbance in climate an...
Data
Post hoc tests for differences among nine phenological variables. (PDF)
Article
Full-text available
The Neutral Theory of Molecular Evolution is considered the most powerful theory to understand the evolutionary behavior of proteins. One of the main predictions of this theory is that essential proteins should evolve slower than dispensable ones owing to increased selective constraints. Comparison of genomes of different species, however, have rev...
Article
Full-text available
Ionizing radiation has been shown to produce negative effects on organisms, although little is known about its ecological and evolutionary effects. As a study model, we isolated bacteria associated with feathers from barn swallows Hirundo rustica from three study areas around Chernobyl differing in background ionizing radiation levels and one contr...
Poster
La cría de Litopenaeus vannamei es el principal cultivo de la costa ecuatoriana. Un problema que afecta al camarón post-cosecha es la melanización de la cutícula, deteriorando la calidad del producto. Usualmente, se aplica metabisulfito sódico al 8% por inmersión. Tras su uso, el agua se vierte al canal de salida. Después de 3-8 días post-vertido s...
Article
Full-text available
GroESL is a heat-shock protein ubiquitous in bacteria and eukaryotic organelles. This evolutionarily conserved protein is involved in the folding of a wide variety of other proteins in the cytosol, being essential to the cell. The folding activity proceeds through strong conformational changes mediated by the co-chaperonin GroES and ATP. Functions...
Article
Full-text available
Because of their ecological characteristics, slow growth rates and the presence of contaminants, Chaetothyriales fungi associated with structures built by tropical plant-ants can be difficult to isolate with standard procedures. Here, we describe an easy-to-use protocol for obtaining pure cultures by using cotton as a first substrate. We have furth...
Article
The evolutionary ecology of multihost parasites is predicted to depend upon patterns of host quality and the dynamics of transmission networks. Depending upon the differences in host quality and transmission asymmetries, as well as the balance between intra- and interspecific transmission, the evolution of specialist or generalist strategies is pre...
Article
Full-text available
The interaction between Allomerus plant-ants and an ascomycete fungus growing on and strengthening their galleries is not opportunistic. We previously demonstrated that this association is highly specific as only one fungal species represented by a few haplotypes was found associated with the ants. We also discovered that the ants' behavior reveale...
Article
Full-text available
Fungus-growing attine ants use natural-product antibiotics produced by mutualist actinobacteria as 'weedkillers' in their fungal gardens. Here we report for the first time that fungus-growing Allomerus ants, which lie outside the tribe Attini, are associated with antifungal-producing actinobacteria, which offer them protection against non-cultivar...
Article
Full-text available
Ant-fungus associations are well known from attine ants, whose nutrition is based on a symbiosis with basidiomycete fungi. Otherwise, only a few non-nutritional ant-fungus associations have been recorded to date. Here we focus on one of these associations involving Allomerus plant-ants that build galleried structures on their myrmecophytic hosts in...
Article
Proteins rarely function in isolation but they form part of complex networks of interactions with other proteins within or among cells. The importance of a particular protein for cell viability is directly dependent upon the number of interactions where it participates and the function it performs: the larger the number of interactions of a protein...
Article
Full-text available
1. Plants often rely on external, mutualistic partners to survive and reproduce in resource-limited environments or for protection from enemies. Such interactions, including mycorrhizal symbioses and ant–plant associations, are widespread and play an important role at the ecosystem and community levels. In ant–plant mutualisms, the plants may benef...
Article
Full-text available
The aim of this study, which was conducted in French Guiana, was to characterize the karyotypes of nine ant species belonging to the genera Anochetus, Apterostigma, Cyphomyrmex, Camponotus, Gigantiops, Myrmicocrypta, Odontomachus and Pseudomyrmex, and to compare them with published data. We present the first descriptions of the karyotypes of Gigant...
Article
Full-text available
Wasp nests range from simple to complex structures made of paper or mud. Here, we show that a Neotropical wasp of the genus Nitela builds its nest entirely by weaving endophytic fungal hyphae and spider silk harvested from the leaves growing in the understory of the rain forest in French Guiana.
Article
Full-text available
The innate immune system provides defence against parasites and pathogens. This defence comes at a cost, suggesting that immune function should exhibit plasticity in response to variation in environmental threats. Density-dependent prophylaxis (DDP) has been demonstrated mostly in phase-polyphenic insects, where larval group size determines levels...
Article
Full-text available
Crematogaster pygmaea is revived from synonymy under C. abstinens and newly characterized as a ground-nesting ant from northeastern Brazil. It is a habitat specialist in coastal and tabuleiro zones, where it forms extensive polydomous and polygynous colonies that nest in the soil. Workers forage extensively on honeydew and extrafloral nectar, and f...
Article
1. Experimental studies of multihost parasite dynamics are scarce. Understanding the transmission dynamics of parasites in these systems is a key task in developing better models of parasite evolution and to make more accurate predictions of disease dynamics. 2. Bumblebee species (Bombus spp.) host the trypanosomatid parasite, Crithidia bombi. Its...
Article
Full-text available
Many eubacteria contain an ATP-dependent protease complex, which is built by multiple copies of the HslV and HslU proteins and is therefore called HslVU. HslU proteins are AAA + ATPases, while HslV proteins are proteases that show highly significant similarity to beta subunits of proteasomes. Therefore, the HslVU complex has been envisaged as a pre...
Article
The haploid state of males in eusocial Hymenoptera-the ants, bees, and wasps-has been proposed as a driving force in the evolution of social behavior under the assumption that haploidy results in higher susceptibility to pathogens. In this study, we present the first test of the assumptions of the "haploid male susceptibility hypothesis". We challe...
Article
Full-text available
Host nutrition plays an important role in determining the development and success of parasitic infections. While studies of vertebrate hosts are accumulating, little is known about how host nutrition affects parasites of invertebrate hosts. Crithidia bombi is a gut trypanosome parasite of the bumble bee, Bombus terrestris and here we use it as a mo...
Article
Full-text available
Type 1 (archaeal) rhodopsins and related rhodopsin-like proteins had been described in a few halophile archaea, γ-proteobacteria, a single cyanobacteria, some fungi, and a green alga. In exhaustive database searches, we detected rhodopsin-related sequences derived not only from additional fungal species but also from organisms belonging to three gr...
Article
Full-text available
GroEL, a heat-shock protein that acts as a molecular chaperone, is overproduced in endosymbiotic but not in free-living bacteria, presumably to assist in the folding of conformationally damaged proteins. Here we show that the overproduction of GroEL in Escherichia coli masks the effects of harmful mutations that have accumulated during a simulated...

Questions

Question (1)
Question
I know that protists host many viruses and that some protists can act as vector for certain viruses. I wonder whether the particular case of reciprocal positive interaction virus-protist exists in nature. Does anybody knows about that particular intraction?

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