Juan Florencio Gómez-Leyva

Instituto Tecnológico de Tlajomulco · Laboratorio de Biología Molecular

Rubus species are commonly exploited for fresh consumption, regional gastronomy and traditional herbalism, these benefits are attributed to the presence and action of their polyphenolic metabolites such as flavonoids and anthocyanins, which are known for their antidiabetic, anticancer, etc. In Mexico, around 15 wild species of Rubus are reported. H...

Se registra por primera vez a Caloptilia stigmatella (Fabricius) como parte de la entomofauna de microlepidópteros minadores de la flora en la Rivera de Chapala en Jalisco, México, sobre una planta trepadora identificada como Serjania recemosa Schumach, nueva planta hospedera. Para la obtención de los adultos, larvas y pupas de Caloptilia stigmatel...

The benefits of mycorrhizal interactions are only known in 8 of 210 recognized Agave taxa. We evaluated the effects of autochthonous and allochthonous arbuscular mycorrhizal fungi (AMF) on growth and nutrient assimilation in Agave maximiliana. The autochthonous consortium (Cn) of eight species was propagated from the rhizospheric soil of A. maximil...

Plant-based bio-batteries, i.e., plant microbial fuel cells (P-MFCs) are devices that convert chemical energy into electrical energy by using microbial activity (as catalysts). These sustainable technologies have previously been used in different fields of investigation such as wastewater treatment, bioremediation of pollutants, heavy metals and en...

The objectives of this study were to identify and rank the covariables of soil-forming factors that affect the distribution and spatial variability of pH in an agricultural area and to obtain a predictive map of soil pH. Samples of topsoil were obtained from different sites and taken to the laboratory, where they were prepared to determine the pH,...

This chapter discusses the fundamental classification of bioelectrochemical systems (BESs) based on the energy liberated and energy required (microbial electrolysis and microbial electrosynthesis) and their real-time applications, e.g. biosensing (BOD sensors, IoT sensors, etc), bioremediation, and scalable production of biohydrogen and other valua...

Plant microbial fuel cells (P-MFCs) are sustainable and eco-friendly technologies, which use plant root exudates to directly nourish the electrochemically active bacteria (EABs) to generate sustainable electricity. However, their use in evaluating plant growth has been insufficiently studied. In this study, interconnection between plant growth and...

The marked acceleration in environmental pollution resulting in an increase in multiple deleterious effects on the environment, health, and society has, in recent years, brought about numerous effective cleansing alternatives developed by researchers internationally. One of the prominent alternatives to effectively reduce contamination has been wit...

The objective of the study was to analyse the prevalence of infection by N. caninum and T. gondii in breeding ewes from central western Mexico. For this purpose, 184 blood samples were collected from sheep in the reproductive stage, which were analysed by ELISA and PCR tests, respectively, and the association between seroprevalence and some managem...

Se registra por primera vez para México a Rifseria fuscotaeniaella (Chambers, 1878) como minador de la hoja de Montanoa tomentosa Cerv., anteriormente citado en varias especies de maleza de la familia Asteraceae en Estados Unidos y Canadá

Plant microbial fuel cell (Plant-MFC) is an emerging technology that uses the metabolic activity of electrochemically active bacteria (EABs) to continue the production of bioelectricity. Since its invention and to date, great efforts have been made for its application both in real-time and large-scale. However, the construction of platforms or syst...

México cuenta con una gran diversidad de especies de Agave, lo que ha permitido el aprovechamiento de sus azúcares fermentables para la elaboración de bebidas alcohólicas como el tequila y el mezcal. Ambos productos están protegidos con una denominación de origen, pero elaborados a partir de agaves distintos. Cuando el mezcal puede elaborarse a par...

Las enfermedades de la abeja (Apis mellifera), causan grandes pérdidas económicas y se consideran la causa de alta perdida de colonias. En este estudio se determinó la frecuencia y los niveles de infestación de Varroa destructor y Acarapis woodi. Asimismo, se determinó la frecuencia y niveles de infección de Nosema spp., en colonias de abejas melíf...

La apicultura genera divisas para México, sin embargo, Tabasco ocupa el 25vo lugar en producción a nivel nacional. El municipio de Comalcalco, posee recursos agroecológicos con potencial apícola. Con el objetivo de analizar los aspectos socioeconómicos y técnicos de la apicultura, se entrevistaron 11 apicultores, clasificándolos en cuatro estratos....

https://dx.doi.org/10.2139/ssrn.4032234

La apicultura en México se sostiene con subespecies de abejas (Apis mellifera L) europeas y africanizadas. Debido a la dificultad en la diferenciación morfológica de las poblaciones Europeas (E) y Africanizadas (A) de A. mellifera, el objetivo de este trabajo fue realizar un análisis comparativo entre la técnica morfométrica FABIS, contra el diagnó...

Plant Microbial Fuel cell (P-MFC) i.e., biobattery is an emerging sustainable technology, which has an obstacle in plant selection with minimal requirement of water resources. Further optimization of the semi-deserting plant under vigorous conditions has a great challenge. In the present study, a P-MFC has been used to evaluate the improvement of p...

Supplementary data: Characteristics of the soil used in the study ''Effect of ammonium nitrate on novel cactus pear genotypes aided by biobattery in a semi-arid ecosystem''. https://doi.org/10.1016/j.seta.2021.101730

Mediante la identificación taxonómica integrativa se describen dos morfoespecies del género Chloridea Duncan [& Westwood], 1841 que afectan al tabaco negro en la provincia de Pinar del Río, Cuba. Se recolectaron larvas de último instar en dos poblaciones con diferente hábito alimenticio: la primera afectando la yema terminal del tallo y la segunda...

The efficient propagation of plant species with high food potential plays a fundamental role in their adoption and use by producers. It is important, therefore, to develop economical and rapid methods for the successful establishment of more productive systems. In order to know some reproductive aspects of different outstanding genotypes of T. dive...

Objective: A study was carried out in the Ingenio Santa Rosalía sugar mill supply area with the aim of identifying the soil subunits cultivated with sugar cane and to quantify the degree of mycorrhization of Saccharum officinarum. Design/Methodology/Approach: Rhizosphere samples were collected at a depth of 0-30 cm and root segments with diameters...

La producción del tomate en áreas con problemas de salinidad provoca en las plantas una disminución en rendimiento, sin embargo, algunos cambios en condiciones de salinidad pueden resultar positivos en cuanto a los atributos organolépticos en frutos. En el presente trabajo se determinó el papel de la simbiosis entre Solanum lycopersicum cv MicroTom...

The objective of the present study was to investigate the epidemiology of natural infection by N. caninum in free-range chickens from Aguascalientes, Mexico, through identifying the presence of antibodies, its association with certain risk factors, and estimate the frequency of parasite DNA detection in the brain. The study included 150 clinically...

Tithonia diversifolia is a shrub with excellent forage characteristics that has shown a wide genetic and phenotypic diversity. The objective of this study was to determine the biomass production and nutritional quality of seven genotypes of T. diversifolia with outstanding characteristics for ruminant nutrition, to analyze the Genotype x Environmen...

The purpose of this research was to analyze the process of africanization of colonies managed by honey bees (Apis mellifera) by means of PCR-RFLP analysis of mitochondrial DNA and its relationship with sanitary, defensive and production aspects in 33 apiaries by means of a stratified random sampling in a gradient from 450 to 1,500 meters above sea...

Neospora spp. es un parásito protozoario causante de abortos y enfermedad del Sistema Nervioso Central (SNC) en diversas especies domésticas y silvestres. En equinos, se le ha involucrado como causa de aborto, mortalidad neonatal y enfermedades del SNC. La especie identificada en equinos es distinta a Neospora caninum y se denomina Neospora hughesi...

Brucellosis is an infectious disease that limits livestock development and greatly affects the livestock economy, being considered one of the most important and widely distributed zoonoses worldwide. Early diagnosis of this disease is an essential tool in its control and eradication. The methods recognized by NOM-041-ZOO-1995, such as the card test...

Bioelectrochemical systems (BES) such as microbial fuel cells (MFCs) and plant microbial fuel cells (P-MFCs) are renewable energy sources, which have been developed for various applications. These include, biosensors, biofuel production, wastewater treatment, surface water remediation and contaminated sediments. Unlike conventional MFCs, P-MFCs can...

Se registra por primera vez para México Antispastis xylophragma Meyrick, 1926 como minador de la hoja de Solanum umbellatum Mill. Este Lepidoptera fue anteriormente citado en varias especies de Solanum para Argentina, Brasil, Costa Rica, Perú y Sudáfrica.

The plant microbial fuel cell (P-MFC) is a novel bioelectrochemical device that is commonly used in highly water-saturated ecosystems to produce sustainable energy. However, the use of this system in arid or semi-arid areas has been less well explored to date. This would involve, the use of plants such as prickly pear, which adapts to these adverse...

First record from Mexico for Antispastis xylophragma Meyrick, 1926 as a leaf miner of Solanum umbellatum Mill. This Lepidoptera species was previously reported on several Solanum species for Argentina, Brazil, Costa Rica, Peru and South Africa

Some types of cancer are resistant to conventional treatments, such as triple-negative (TN) breast cancer (BC), which, due to its molecular characteristics, does not respond effectively. In recent years, there has been an increase in the use of medicinal plants for prevention and as an alternative in adjuvant therapy for cancer. Hibiscus sabdariffa...

The plant microbial fuel cell (P-MFC) is a novel bioelectrochemical device that is commonly used in highly water-saturated ecosystems to produce sustainable energy. However, the use of this system in arid or semi-arid areas has been less well explored to date. This would involve, the use of plants such as prickly pear, which adapts to these adverse...

Diagnosis about rhizospheric bacteria associated with the cultivation of sugarcane (Saccharum spp.) Diagnóstico sobre las bacterias rizosféricas asociadas al cultivo de caña de azúcar (Saccharum spp.)

The purpose of this study was to describe the prevalence and incidence of Neospora caninum infection in dogs that are in close contact with dairy cattle and to identify possible risk factors associated with the infection in this population. Twenty-four dogs located in 8 different dairy farms of Aguascalientes, Mexico, were evaluated for a 6-mo peri...

La variabilidad genética en Agave tequilana es limitada debido a la manera clonal de reproducción en campo. En el presente trabajo se indujeron mutaciones en plantas de Agave tequilana micropropagadas in vitro vía embriogénesis indirecta empleando radiación ionizante con rayos gamma Co 60 a las dosis de 10 Gy, 15 Gy, 20 Gy y 25 Gy. Las plántulas re...

Presentación realizada en el X Congreso Internacional Sobre Sistemas Silvopastoriles, desarrollado en el Paraguay año 2019

El apropiado uso de arbustivas en sistemas silvopastoriles, tiene un papel fundamental en el mejoramiento de la productividad y sostenibilidad de la empresa pecuaria, debido a esto la identificación y evaluación de ecotipos destacados debe ser el punto de partida para incrementar la eficiencia en la utilización de los recursos forrajeros. El objeti...

Fourth World Congress on Agroforestry----- In plant species, genetic and morphological variability are considered the basis for their adaptation and ability to respond to challenges and threats (Govindaraj et al., 2015). Tithonia diversifolia, a shrub of the family Asteraceae, is considered a forage species of great importance due to its chemical...

La mayor parte del chile "amashito" (Capsicum annuum L. Var: glabriusculum) que se comercializa en México, proviene de recolectas en poblaciones silvestres, las cuales están disminuyendo drásticamente por la sobreexplotación de este recurso fitogenético. Factores propios de la semilla, limitan su germinación y por ende el establecimiento de plantac...

Tithonia diversifolia has attracted attention in different fields of research beyond livestock production, including its potential for adaptation, biomass production, nutrient supply and therapeutic properties. The objective of the present review is to explore aspects of diversity, adaptation, phytochemical content and the association of other orga...

There are 5 new Crambidae species belonging to Spilomelinae first reported for Mexico Lepidoptera fauna: Apilocrocis pimalis (Barnes & Banjamin, 1926), Conchylodes erinalis (Walker, 1859) syn. nov., Diaphania culminalis (Schaus, 1924), Gonocausta sabinalis Dyar, 1914 and Syllepis marialis Poey, 1832. KEY WORDS: Lepidoptera, Pyraloidea, Crambidae, S...

El chile habanero (Capsicum chinense Jacq.) es distintivo de la Península de Yucatán, México; sin embargo, los estudios de diversidad genética a nivel molecular en este cultivo son escasos. El presente trabajo se planteó con el objetivo de caracterizar la diversidad genética del germoplasma de chile habanero, mediante marcadores ISSR. El material g...

ABSTRACT The tuberose (Polianthes tuberosa) is a cut flower of importance in Morelos for its considerable economic and social impact, however, its production is affected by the bulb rot, caused by phytopathogenic bacteria. Actinomycetes as biocontrol agents are recognized for their ability to produce bioactive compounds with antimicrobial activity....

In the laboratory (T = 24,02 ± 0,24°C; HR=82,52 ± 0,72%) and with different feeding, the cuticle color and ornamentation were determined in the last instar of Chloridea virescens Fab., from a cohort of 60 F1. Leaves of tobacco were used (main host), pigeon pea pods and rose petals (alternative hosts) were used for feeding. Duration of the larval ph...

The biology and life table of two populations of Chloridea virescens F. were evaluated under laboratory conditions (T= 24.02 ± 0.24°C; HR= 82.52 ± 0.72 %). Both populations differed in the morphological characteristic of the last instar larvae and the organ of the plant of tobacco from which they were collected. They were separated into two groups:...

Agave (Agave tequilana Weber var. azul), it is commonly known as “Agave Azul Tequilero”. The Agave crop is an economically important of Mexico because employers in field and industry, in addition it is the ingredient for tequila, a distilled spirit drink. The objective of this research was to evaluate two auxins with three concentrations to embryog...

A complex coacervation method was used to achieve the microencapsulation of capsaicinoids of chili pepper oleoresin (CJO) using maltodextrin (MDx) and skim milk powder. Conditions were set for two variables and adjusted to a complete factorial design (23). The recovery time of CJO was reduced to 2 h using acetone as the extraction solvent, and the...

Hibiscus Sabdariffa L. también conocida como flor de jamaica es una planta que pertenece a la familia de las malvaceae. En los últimos años se ha estudiado sus compuestos bioactivos, de los cuales destacan las antocianinas, un grupo de antioxidantes pertenecientes a los polifenoles que tienen gran capacidad para neutralizar a las especies reactivas...

Tithonia diversifolia has attracted attention in different fields of research beyond livestock production, including its potential for adaptation, biomass production, nutrient supply and therapeutic properties. The objective of the present review is to explore aspects of diversity, adaptation, phytochemical content and the association of other orga...

Habanero pepper (Capsicum chinense Jacq.) is distinctive of the Yucatan Peninsula, Mexico; however, studies of genetic diversity at the molecular level on this crop are scarce. The present study was proposed with the objective of characterizeing the genetic diversity of habanero pepper germplasm by using ISSR markers. The genetic material consisted...

Tithonia diversifolia is a shrub with great potential for animal feed thanks to its adequate nutritional quality, edaphoclimatic adaptability and high production of biomass, but it shows great differences in its agronomic performance and nutritional quality depending on the origin of the material used. The objective of the present study was to char...

Trabajo presentado en simposio pre-congreso sobre Tithonia diversifolia. IX Congreso Internacional de Sistemas Silvopastoriles (Manizales, 2017)

Los agaves pertenecen a la familia Asparagaceae y forman la subfamilia Agavoideae. La suma de adaptaciones morfológicas y fisiológicas a la sequía y temperatura permite a estas plantas adaptarse a una gran variedad de ambientes, lo que contribuye a su amplia dispersión. No existe una filogenia de la familia Asparagaceae que permita delimitar los gé...

In order to select the best plants and verify genetic diversity of Tithonia diversifolia, was performed analysis of genetic diversity in type SSR molecular markers (Simple Sequence Repeats). 20 plant samples of Tithonia diversifolia in each of the sites of the 12 zones of Michoacan, Mexico were collected and thus the genebank was formed eight initi...

Main conclusion: An amaranth DGR gene, induced under abiotic stress, modifies cell wall structure and causes hypersensitivity to ABA and salt when overexpressed in Arabidopsis. DUF642 is a highly conserved plant-specific family of unknown cell wall-associated proteins. The AhDGR2 gene, coding for a DUF642 protein, was significantly induced in grai...

The effect of short-term treatments with non-toxic concentrations of chemical elicitors of carbon mobilization and/or defense responses on fructan accumulation and complexity was analyzed in Agave tequilana plantlets. These included sucrose (ExSuc), salicylic acid (SA), and methyl jasmonate (MeJA). Methyl viologen (MV), an oxidative-stress elicitor...

The black spot cactus is caused by Pseudocercospora opuntiae a disease spread among production systems. The process of pathogenesis, comprising an incubation period of 90 d. and the development of symptoms can occur in 25 d.; however, is still limited information pathosystem P. opuntiae in Opuntia sps. This study aimed to evaluate the effect of ext...

We recently reported an immune-modulatory role of conjugated bilirubin (CB) in hepatitis A virus (HAV) infection. During this infection the immune response relies on CD4+ T lymphocytes (TLs) and it may be affected by the interaction of HAV with its cellular receptor (HAVCR1/TIM-1) on T cell surface. How CB might affect T cell function during HAV in...

The black spot cactus is caused by Pseudocercospora opuntiae a disease spread among production systems. The process of pathogenesis, comprising an incubation period of 90 d. and the development of symptoms can occur in 25 d.; however, is still limited information pathosystem P. opuntiae in Opuntia sps. This study aimed to evaluate the effect of ext...

The seeds of Opuntia sps show low germination capacity and high latency, so this study compares different inert and synthetic substrates in vitro with the addition of gibberellic acid (GA 3) to stimulate seed germination in ten cultivars of Opuntia sps. (O. megacantha, O. amyclaea, O. streptacantha, O. albicarpa and O. ficus-indica). The photoperio...

Durante el año 2012 la Red Agaváceas atendió las propuestas establecidas en el plan estratégico, en el que se definió como prioridad la identificación del estado que guarda el material de herbario de la familia Agavaceae, para lo cual se realizó el registro y la captura de la información de 750 ejemplares de los géneros Agave, Beschorneria, Furcrae...