Luis C. Mejía

ORCID: 0000-0003-2135-5241
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About
Contact & Profiles
Research Areas
  • Plant Pathogens and Fungal Diseases
  • Mycorrhizal Fungi and Plant Interactions
  • Cocoa and Sweet Potato Agronomy
  • Plant Virus Research Studies
  • Plant-Microbe Interactions and Immunity
  • Insect symbiosis and bacterial influences
  • Mosquito-borne diseases and control
  • Plant and fungal interactions
  • Microbial Natural Products and Biosynthesis
  • Vector-borne infectious diseases
  • Microbial Community Ecology and Physiology
  • Plant Pathogenic Bacteria Studies
  • Lichen and fungal ecology
  • Coral and Marine Ecosystems Studies
  • Aquaculture disease management and microbiota
  • Insect and Pesticide Research
  • Nematode management and characterization studies
  • Yeasts and Rust Fungi Studies
  • COVID-19 Pandemic Impacts
  • Legume Nitrogen Fixing Symbiosis
  • Zoonotic diseases and public health
  • Banana Cultivation and Research
  • Insect behavior and control techniques
  • Phytochemical compounds biological activities
  • Yersinia bacterium, plague, ectoparasites research

Florida International University
2025

City of Knowledge
2015-2024

Instituto de Investigaciones Científicas y Servicios de Alta Tecnología
2015-2024

Merck & Co., Inc., Rahway, NJ, USA (United States)
2024

Secretaría Nacional de Ciencia, Tecnología e Innovación
2021-2024

Smithsonian Tropical Research Institute
2003-2024

Universidad de Panamá
2022-2024

Smithsonian Institution
2007-2017

University of San Carlos of Guatemala
2007-2016

University of Florida
2016

Every plant species examined to date harbors endophytic fungi within its asymptomatic aerial tissues, such that endophytes represent a ubiquitous, yet cryptic, component of terrestrial communities. Fungal associated with leaves woody angiosperms are especially diverse; yet, fundamental aspects their interactions hosts unknown. In contrast the relatively species-poor vertically transmitted and act as defensive mutualists some temperate grasses, diverse, horizontally thought contribute little...

10.1073/pnas.2533483100 article EN Proceedings of the National Academy of Sciences 2003-12-11

The Gnomoniaceae are characterised by ascomata that generally immersed, solitary, without a stroma, or aggregated with rudimentary in herbaceous plant material especially leaves, twigs stems, but also bark wood.The black, soft-textured, thin-walled, and pseudoparenchymatous one more central eccentric necks.The asci usually have distinct apical ring.The includes species having ascospores small, mostly less than 25 μm long, although some longer, range septation from non-septate to one-septate,...

10.3114/sim.2008.62.01 article EN cc-by-nc-nd Studies in Mycology 2008-01-01

In advancing to one name for fungi, this paper treats generic names competing use in the order Diaporthales (Ascomycota, Sordariomycetes) and makes a recommendation or protection of among synonymous that may be either sexually asexually typified. A table is presented summarizes these recommendations. Among genera most commonly encountered order, Cytospora recommended over Valsa Diaporthe Phomopsis. New combinations are introduced oldest epithet important species genus. These include...

10.5598/imafungus.2015.06.01.09 article EN cc-by IMA Fungus 2015-06-01

The significance of symbioses between eukaryotic hosts and microbes extends from the organismal to ecosystem level underpins health Earth's most threatened marine ecosystems. Despite rapid growth in research on host-associated microbes, individual microbial symbionts consortia significantly relevant taxa, little is known about their interactions with vast majority host species. We outline priorities strengthen our current knowledge host-microbiome how they shape argue that such advances will...

10.1371/journal.pbio.3000533 article EN public-domain PLoS Biology 2019-11-11

It is increasingly recognized that microbiota affect host health and physiology. However, it unclear what factors shape microbiome community assembly in nature, how can be manipulated to improve health. All plant leaves foliar endophytic fungi, which make up a diverse, environmentally acquired fungal microbiota. Here, we experimentally of the cacao tree ( Theobroma ) nature tested effect outcome on Using next-generation sequencing, as well culture-based methods coupled with Sanger found...

10.1098/rspb.2017.0641 article EN Proceedings of the Royal Society B Biological Sciences 2017-07-05

The fungus-growing ant-microbe symbiosis is an ideal system to study chemistry-based microbial interactions due the wealth of described, and lack information on molecules involved therein. In this study, we employed a combination MALDI imaging mass spectrometry (MALDI-IMS) MS/MS molecular networking in system. IMS was used visualize distribution antimicrobials at inhibition zone between bacteria associated ant Acromyrmex echinatior fungal pathogen Escovopsis sp. for dereplication compounds...

10.1038/s41598-017-05515-6 article EN cc-by Scientific Reports 2017-07-11

Premise Interactions between fungal endophytes and their host plants present useful systems for identifying important factors affecting assembly of host‐associated microbiomes. Here we investigated the role secondary chemistry in mediating affinity asymptomatic foliar endophytic fungi using Psychotria spp. Theobroma cacao (cacao) as hosts. Methods First, surveyed communities species a natural common garden culture‐based methods. Then compared differences community composition with same...

10.1002/ajb2.1436 article EN publisher-specific-oa American Journal of Botany 2020-02-01

The pathogenesis-related (PR) group of proteins are operationally defined as polypeptides that increase in concentration plant tissues upon contact with a pathogen. To date, 17 classes highly divergent have been described act through multiple mechanisms pathogen resistance. Characterizing these families cacao, an economically important tree crop, and comparing the to those other species, is step understanding cacao's immune response. Using publically available resources, all members...

10.1186/s12864-016-2693-3 article EN cc-by BMC Genomics 2016-05-17

Members of the genus Plagiostoma inhabit leaves, stems, twigs, and branches woody herbaceous plants predominantly in temperate Northern Hemisphere. An account all known species including Cryptodiaporthe is presented based on analyses morphological, cultural, DNA sequence data. Multigene phylogenetic sequences from four genes (β-tubulin, ITS, rpb2, tef1-α) revealed eight previously undescribed an association between a clade composed 11 host family Salicaceae. In this paper these new are...

10.3114/sim.2011.68.10 article EN cc-by-nc-nd Studies in Mycology 2011-03-01

This is a descriptive study using healthcare claims data from patients with T2DM public and private insurance companies providing services in Puerto Rico 2013, aimed to estimate the prevalence of comorbidities this population. Descriptive analyses were performed by sociodemographic, type service variables frequency percent for categorical or means (+/-SD) median (IQR) continuous variables. Chi-square, Fisher exact two-sample t-tests used comparisons. A total 3,100,636 identified 485,866...

10.1177/26335565231224570 article EN cc-by-nc Journal of Multimorbidity and Comorbidity 2024-01-01

Fifty‐nine Ralstonia solanacearum isolates from diverse crops and regions were collected characterized to determine the distribution diversity of this soilborne pathogen in Guatemala. Three distinct types present: a phylotype I, sequevar 14 strain, probably originating Asia, infecting tomatoes aubergines at moderate elevations; II, 6 strain American origin causing Moko disease lowland banana plantations; 1 (race 3 biovar 2) brown rot on potatoes, Southern wilt Pelargonium spp. bacterial...

10.1111/j.1365-3059.2007.01769.x article EN Plant Pathology 2007-12-02

Decades of intensive tomato breeding using wild-species germplasm have resulted in the genomes domesticated (Solanum lycopersicum) being intertwined with introgressions from their wild relatives. Comparative analysis among cultivated tomatoes and species that contributed genetic variation can help identify desirable genes, such as those conferring disease resistance. The ability to introgression position, borders, contents reveal ancestral origins facilitate harnessing crop breeding.Here we...

10.1186/s12870-014-0287-2 article EN cc-by BMC Plant Biology 2014-10-27

Mangrove ecosystems are threatened worldwide by a wide range of factors including climate change, coastal development, and pollution. The effects these on soil bacterial communities Neotropical mangroves their temporal dynamics is largely undocumented. Here we compared the diversity taxonomic composition in two mangrove forest sites Panama Bay: Juan Diaz (JD), an urban City surrounded with occurrence five species, polluted solid waste sewage; Bayano (B), rural without pollution, presence...

10.3390/microorganisms10112191 article EN cc-by Microorganisms 2022-11-04

Ralstonia solanacearum race 3 biovar 2 is a regulated quarantine pathogen that infects solanaceous hosts such as potato well geranium, where it causes either bacterial wilt (also known Southern Wilt) or symptomless latent infection. Geranium growers and government regulators need reliable detection methods to identify infected plant material before exported. We previously found R. solanacearum-infected geranium plants can shed millions of bacteria in effluent water flows from pots. tested...

10.1094/pdis-91-7-0828 article EN other-oa Plant Disease 2007-06-18

A new lineage is discovered within the Botryosphaeriaceae (Ascomycetes, Dothideomycetes, incertae sedis). Consistent with current practice of providing generic names for independent lineages, this described as Endomelanconiopsis gen. nov., anamorphic species E. endophytica sp. nov. and microspora comb. (= Endomelanconium microsporum). characterized by eustromatic conidiomata holoblastically produced, brown, nonapiculate, unicellular conidia, each a longitudinal germ slit. Phylogenetic...

10.3852/07-207 article EN Mycologia 2008-09-01

Tomato genotypes with resistance to begomoviruses derived from different wild species were evaluated in Guatemala. Selection of individual plants for several generations resulted breeding lines high levels resistance. Resistance L. hirsutum was dominant, while the other sources more recessive nature. Crosses among resistant higher F1 populations than crosses between and susceptible lines. Resistant crossed traits interest, namely pathogens desirable fruit characters. Improved begomovirus...

10.17660/actahortic.2005.695.27 article EN Acta Horticulturae 2005-11-01

The phylogeny of Cryptosporella is revised to include recently discovered species. Eight species new science are described and two combinations proposed, raising the total number accepted in 19. delimitation for determined based on analyses DNA sequences from three genes (β-tubulin, ITS tef1-α), comparative morphology sexual structures their host substrate, associations. inferred suggests that has speciated primarily Betulaceae with 16 occurring hosts plant family. range most seems be narrow...

10.3852/10-134 article EN Mycologia 2011-03-01

Malaria control in Panama is problematic due to the high diversity of morphologically similar Anopheles mosquito species, which makes identification vectors human Plasmodium challenging. Strategies by Panamanian health authorities bring malaria under targeting could be ineffective if they tackle a misidentified species.A rapid mass spectrometry procedure was developed accurately and timely sort out field-collected Neotropical mosquitoes into vector non-vector species. Matrix-assisted laser...

10.1186/s12936-019-2723-0 article EN cc-by Malaria Journal 2019-03-22
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