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Merit del Rocío Mora-Ruiz

Mediterranean Institute for Advanced Studies

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Ramon Rosselló‐Mora

Consejo Superior de Investigaciones Científicas

Bernardo González

Hospital Universitario Infanta Sofía

Alejandro Orfila

Mediterranean Institute for Advanced Studies

Francisca Font-Verdera

Mediterranean Institute for Advanced Studies

Ana Cifuentes

Mediterranean Institute for Advanced Studies

Carlota Alejandre-Colomo

Max Planck Institute for Marine Microbiology

Gustavo Rodríguez-Valdecantos

Adolfo Ibáñez University

Mercedes Urdiain

Mediterranean Institute for Advanced Studies

Carlos Díaz‐Gil

Mediterranean Institute for Advanced Studies

Marı́a Eugenia Farı́as

Consejo Nacional de Investigaciones Científicas y Técnicas

Cooperative Institutions

Consejo Superior de Investigaciones Científicas

Mediterranean Institute for Advanced Studies

Universitat de les Illes Balears

Adolfo Ibáñez University

Center of Applied Ecology & Sustainability

Instituto Nacional de Salud Pública

Mediterranean Institute for Advanced Studies

Centro de Astrobiología

Instituto Nacional de Técnica Aeroespacial

University of Kaiserslautern

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Aromatic compounds depurative and plant growth promotion rhizobacteria abilities of Allenrolfea vaginata (Amaranthaceae) rhizosphere microbial communities from a solar saltern hypersaline soil

Frontiers in Microbiology (2023)

Gustavo Rodríguez-Valdecantos Felipe Torres-Rojas Sofía Muñoz-Echeverría Merit del Rocío Mora-Ruiz Ramon Rosselló‐Mora

Introduction This work investigates whether rhizosphere microorganisms that colonize halophyte plants thriving in saline habitats can tolerate salinity and provide beneficial effects to their hosts, protecting them from environmental stresses, such as aromatic compound (AC) pollution. Methods To address this question, we conducted a series of experiments. First, we evaluated the effects of phenol, tyrosine, 4-hydroxybenzoic acid, and 2,4-dichlorophenoxyacetic (2,4-D) acids on the soil rhizosphere microbial community associated with the halophyte Allenrolfea vaginata . We then determined the ability of bacterial isolates from these microbial communities to utilize these ACs as carbon sources. Finally, we assessed their ability to promote plant growth under saline conditions. Results Our study revealed that each AC had a different impact on the structure and alpha and beta diversity of the halophyte bacterial (but not archaeal) communities. Notably, 2,4-D and phenol, to a lesser degree, had the most substantial decreasing effects. The removal of ACs by the rhizosphere community varied from 15% (2,4-D) to 100% (the other three ACs), depending on the concentration. Halomonas isolates were the most abundant and diverse strains capable of degrading the ACs, with strains of Marinobacter , Alkalihalobacillus , Thalassobacillus , Oceanobacillus , and the archaea Haladaptatus also exhibiting catabolic properties. Moreover, our study found that halophile strains Halomonas sp. LV-8T and Marinobacter sp. LV-48T enhanced the growth and protection of Arabidopsis thaliana plants by 30% to 55% under salt-stress conditions. Discussion These results suggest that moderate halophile microbial communities may protect halophytes from salinity and potential adverse effects of aromatic compounds through depurative processes.

Halomonas

Phyllosphere

Amaranthaceae

10.3389/fmicb.2023.1251602

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Transition boundaries for protistan species turnover in hypersaline waters of different biogeographic regions

Environmental Microbiology (2017)

Sabine Filker Dominik Forster Lea Weinisch Merit del Rocío Mora-Ruiz Bernardo González

The identification of environmental barriers which govern species distribution is a fundamental concern in ecology. Even though salt was previously identified as a major transition boundary for micro- and macroorganisms alike, the salinities causing species turnover in protistan communities are unknown. We investigated 4.5 million high-quality protistan metabarcodes (V4 region of the SSU rDNA) obtained from 24 shallow salt ponds (salinities 4%-44%) from South America and Europe. Statistical analyses of protistan community profiles identified four salinity classes, which strongly selected for different protistan communities: 4-9%, 14-24%, 27-36% and 38-44%. The proportion of organisms unknown to science is highest in the 14-24% salinity class, showing that environments within this salinity range are an unappreciated reservoir of as yet undiscovered organisms. Distinct higher-rank taxon groups dominated in the four salinity classes in terms of diversity. As increasing salinities require different cellular responses to cope with salt, our results suggest that different evolutionary lineages of protists have evolved distinct haloadaptation strategies. Salinity appears to be a stronger selection factor for the structuring of protistan communities than geography. Yet, we find a higher degree of endemism in shallow salt ponds compared with less isolated ecosystems such as the open ocean. Thus, rules for biogeographic structuring of protistan communities are not universal, but depend on the ecosystem under consideration.

Endemism

Marine ecosystem

10.1111/1462-2920.13805

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Moderate halophilic bacteria colonizing the phylloplane of halophytes of the subfamily Salicornioideae (Amaranthaceae)

Systematic and Applied Microbiology (2015)

Merit del Rocío Mora-Ruiz Francisca Font-Verdera Carlos Díaz‐Gil Mercedes Urdiain Gustavo Rodríguez-Valdecantos

Pyrosequencing

Phyllosphere

10.1016/j.syapm.2015.05.004

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Citations (54)

Microbial Diversity in Athalassohaline Argentinean Salterns

Springer eBooks (2020)

Merit del Rocío Mora-Ruiz Carlos Díaz‐Gil

Extreme environment

Extremophile

10.1007/978-3-030-36192-1_12

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Socioeconomic factors, attitudes and practices associated with malaria prevention in the coastal plain of Chiapas, Mexico

Malaria Journal (2014)

Merit del Rocío Mora-Ruiz Rosa Patricia Penilla-Navarro José Ordoñez Alma D López Francisco J. Solís

Mexico is in the malaria pre-elimination phase; therefore, continuous assessment and understanding of the social and behavioural risk factors related to exposure to malaria are necessary to achieve the overall goal. The aim of this research was to investigate socio-economic backgrounds, attitudes and practices related with malaria in rural locations from the coastal plain of Chiapas.In January 2012, 542 interviews were conducted to householders from 20 villages across the coastal plain of Chiapas. Questions were about housing conditions, protection from mosquito bites and general information of householders. Chi2 analyses were performed to see whether there was a dependence of those reported having malaria with their house conditions and their malaria preventive practices. Results were discussed and also compared statistically against those obtained 17 years ago from the same area.Most households had 2-5 people (73.6%), 91.6% of houses had 1-3 bedrooms. The physical structure of the houses consisted of walls mainly made of block or brick 72.3%, the floor made of cement 90.0%, while the roof made of zinc sheet 43.9%, and straw or palm 42.2%. A 23.1% of the interviewed completed elementary school and 16.6% was illiterate. A 9.9% of the residents reported at least one family member having had malaria. A 98.1% of families used some method to prevent mosquito bites; those using bed nets were 94.3%. Almost 72% of families bought products for mosquito protection. A total of 537 out of 542 families agreed with the indoor residual spraying (IRS) of insecticide and a frequency of application as often as every two months was preferred.Housing conditions and malaria preventive practices have improved in these rural areas in 17 years, which could be in favor of malaria elimination in this area. Information generated by this study could help in the decision making about whether to use insecticide as indoor residual spraying or to implement massive distribution of long-lasting impregnated bed nets, considering the number of bedrooms and the structure of houses in the region, which may lead to a more efficient vector control for the coastal plain of Chiapas.

Bed nets

10.1186/1475-2875-13-157

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Salt resistance genes revealed by functional metagenomics from brines and moderate-salinity rhizosphere within a hypersaline environment

Frontiers in Microbiology (2015)

Salvador Mirete Merit del Rocío Mora-Ruiz María Lamprecht-Grandío Carolina G. de Figueras Ramon Rosselló‐Mora

Hypersaline environments are considered one of the most extreme habitats on earth and microorganisms have developed diverse molecular mechanisms of adaptation to withstand these conditions. The present study was aimed at identifying novel genes from the microbial communities of a moderate-salinity rhizosphere and brine from the Es Trenc saltern (Mallorca, Spain), which could confer increased salt resistance to Escherichia coli. The microbial diversity assessed by pyrosequencing of 16S rRNA gene libraries revealed the presence of communities that are typical in such environments and the remarkable presence of three bacterial groups never revealed as major components of salt brines. Metagenomic libraries from brine and rhizosphere samples, were transferred to the osmosensitive strain E. coli MKH13, and screened for salt resistance. Eleven genes that conferred salt resistance were identified, some encoding for well-known proteins previously related to osmoadaptation such as a glycerol transporter and a proton pump, whereas others encoded proteins not previously related to this function in microorganisms such as DNA/RNA helicases, an endonuclease III (Nth) and hypothetical proteins of unknown function. Furthermore, four of the retrieved genes were cloned and expressed in Bacillus subtilis and they also conferred salt resistance to this bacterium, broadening the spectrum of bacterial species in which these genes can function. This is the first report of salt resistance genes recovered from metagenomes of a hypersaline environment.

Extreme environment

Extremophile

10.3389/fmicb.2015.01121

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Citations (46)

Biogeographical patterns of bacterial and archaeal communities from distant hypersaline environments

Systematic and Applied Microbiology (2017)

Merit del Rocío Mora-Ruiz Ana Cifuentes Francisca Font-Verdera Cesar A. Pérez-Fernández Marı́a Eugenia Farı́as

10.1016/j.syapm.2017.10.006

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Citations (51)

Exploring the Microbiota Associated to Euhalophytes of the Amaranthaceae Family

Merit del Rocío Mora-Ruiz Francisca Font-Verdera T. Ledger Carlota Alejandre-Colomo Bernardo González

Trabajo presentado en la International Meeting Halophiles, celebrada en San Juan (Puerto Rico), del 22 al 27 de mayo de 2016

Amaranthaceae

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Prokaryotic microbiota in the digestive cavity of the jellyfish Cotylorhiza tuberculata

Systematic and Applied Microbiology (2015)

Sara Cortés-Lara Mercedes Urdiain Merit del Rocío Mora-Ruiz Laura Prieto Ramon Rosselló‐Mora

Pyrosequencing

Phylotype

Spiroplasma

10.1016/j.syapm.2015.07.001

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Citations (25)

Endophytic microbial diversity of the halophyteArthrocnemum macrostachyumacross plant compartments

FEMS Microbiology Ecology (2016)

Merit del Rocío Mora-Ruiz Francisca Font-Verdera Alejandro Orfila Juan Rita Ramon Rosselló‐Mora

In this study, the microbial community structures of the endosphere of the halophyte Arthrocnemum macrostachyum were evaluated from two locations in Mallorca, Spain, focusing on three plant compartments (roots, green and red stems) compared to the rhizospheric soil where the plants grew. The physicochemical parameters of the rhizospheric soils differed between locations, and the soils were characterized by different microbial community structures. Accordingly, the endophytic community composition, mainly composed of putatively halophilic organisms, was highly influenced by the rhizospheric soil microbiota, as revealed by the co-occurrence of the major endophytic taxa in the endosphere and the rizospheric soils. Moreover, the reduction of diversity from the endorhizosphere towards the red leaves may support the fact that part of colonization of the plant by bacteria could have an origin in the rhizospheric soils through the roots and subsequent migration to the aerial parts of the plant. Finally, there were certain relevant ubiquitous taxa, such as Chromohalobacter canadensis, Rudaea cellulosilytica (never reported before as endophytic), Psychrobacter sp., Bradyrhizobium sp. and Halomonas sp., that, due their moderate halophilic nature, seemed to find an optimal environment inside the plants. Some of these relevant endophytes were not always detectable in their respective soils, and were probably part of the soils' rare biosphere, which would gain preponderance in a favorable endophytic environment.

Halomonas

10.1093/femsec/fiw145

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Citations (51)