13 results on '"Salvador-Figueroa, M."'
Search Results
2. Oleosomas de semillas de Jatropha curcas L. como estimadores de diversidad en poblaciones del Sur de México
- Author
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Adriano-Anaya, M. L., Gómez-Pérez, J. A., Ruiz-González, S., Vázquez-Ovando, J. A., Salvador-Figueroa, M., and Ovando-Medina, I.
- Subjects
Heritability ,Diversity ,Diversidad ,Heredabilidad ,Populations ,Oleosomes ,Jatropha ,lcsh:TX341-641 ,Variability ,Oleosomas ,Poblaciones ,lcsh:Nutrition. Foods and food supply ,Variabilidad - Abstract
In this work, we used oleosome data to estimate the variability in eight J. curcas populations of Southern Mexico, using a multivariate approach. We found spherical oleosomes with diameters between 2.18 μm and 4.15 μm, which have two types of spatial arrangements: clustered and dispersed. A discriminant analysis showed that populations with more differentiation are Oaxaca and Veracruz, while Isthmus was the most diverse. The most informative variables for their contribution to the discriminant functions were oleosome size and number of oleosomes·μL of tissue−1. A heritability study with seeds harvested in two consecutive years showed that the variables oleosomes·μL of tissue−1 and oleosomes per cell have high broad sense heritabilities (h2bs=94.3% and h2bs=92.2%, respectively). A cluster analysis revealed high levels of dissimilarity between individuals. Correlation was found between the ratio oleosomes/tissue (volume/volume) and total oil content of the seed. The identification of genotypes with contrasting characteristics could provide the basis for future studies of the inheritance of characters in J. curcas.Se estudiaron los caracteres de oleosomas de la planta para biocombustibles Jatropha curcas L. y se estimó la diversidad de ocho poblaciones del sur de México. Se encontraron oleosomas esféricos, con diámetros entre 2.18 μm y 4.15 μm, presentando dos tipos de arreglos espaciales: agrupados y dispersos. Un análisis discriminante mostró que las poblaciones más diferenciadas del resto son Oaxaca y Veracruz, mientras que Istmo fue la más diversa. Las variables más informativas por su contribución a las funciones discriminantes fueron tamaño de oleosoma y número de oleosomas·μL de tejido−1. En un estudio de heredabilidad con semillas cosechadas en dos años consecutivos se encontró que las variables oleosomas·μL de tejido−1 y oleosomas por célula tienen muy altas heredabilidades en sentido amplio (h2bs=94.3% y h2bs=92.2%, respectivamente). Un análisis de conglomerados reveló altos niveles de disimilitud entre individuos. Los análisis de asociación de variables encontraron correlación entre la relación porcentual oleosomas/tejido (volumen/volumen) y el contenido total de aceite de la semilla.
- Published
- 2014
3. Genetic identification of Theobroma cacao
- Author
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Vázquez-Ovando, J.A., primary, Molina-Freaner, F., additional, Nuñez-Farfán, J., additional, Ovando-Medina, I., additional, and Salvador-Figueroa, M., additional
- Published
- 2014
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4. Effectiveness of Bacillus subtilis ANT01 and Rhizobium sp. 11B on the control of fusarium wilt in pineapple ( Ananas comosus ).
- Author
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Adriano-Anaya L, Pardo-Girón LF, Salvador-Adriano M, Salvador-Figueroa M, Ovando-Medina I, and Moreno-Castillo B
- Subjects
- Humans, Bacillus subtilis, Plants, Fusarium, Ananas, Rhizobium
- Abstract
Pineapple ( Ananas comosus ) is commonly infected by Fusarium oxysporum , causal agent of the fusarium wilt disease. Conventionally, growers use synthetic fungicides to control the disease, which lead to environmental pollution, hazardous effects on non-target organisms and risks on human health. The aim of this work was to assess the effectiveness of Bacillus subtilis ANT01 and Rhizobium sp. 11B to control fusarium wilt on pineapple plants. Four treatments derived from a complete factorial design were tested under field conditions. Treatments composed of B. subtilis ANT01 and the combination B. subtilis ANT01- Rhizobium sp. 11B decreased disease severity by 94.4% and 86.1%, respectively. On the other hand, the treatment prepared with Rhizobium sp. 11B alone showed a reduction of 75.0%. Size of leaves and nutritional condition (SPAD units) of the biocontrol agents-treated plants showed no statistical differences. Moreover, B. subtilis ANT01 decreased by 46% the initial soil population of F. oxysporum , while Rhizobium sp. 11B, B. subtilis ANT01 plus Rhizobium sp. 11B and control, showed a population reduction of 12.5%, 24.2% and 23.0%, respectively. These results make evident the potential of B. subtilis ANT01 as biocontrol agent of the pathogen under field conditions., Competing Interests: The authors declare there are no competing interests., (©2024 Adriano-Anaya et al.)
- Published
- 2024
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5. Association Between SSR Molecular Markers and Chemical and Sensory Traits of Cacao Samples Using Multiple Regression Analysis.
- Author
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Vázquez-Ovando A, Escalona-Buendía H, Ovando-Medina I, and Salvador-Figueroa M
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- Genetic Markers, Cacao genetics, Quantitative Trait, Heritable, Seeds genetics
- Abstract
The sensory properties of cacao beans are linked to the chemical composition of the seeds, and both characteristics are the partial results of its allelic composition. Therefore, it is useful to search for molecular markers associated with these traits. We perform multiple regression analysis to associate previously generated data of alleles generated with 12 SSR (of cultivated cacao trees) with data obtained from chemical and sensory characterization (of beans) of plants grown in the southern region from Mexico. When the association was significant, the mathematical models for predictive purposes were proposed. All phenotypic traits evaluated showed equations with setting values R
2 > 0.5. All chemical characters tested have a significant association with at least two alleles (P < 0.05). In addition, the fat content was associated with six molecular markers (mTcCIR03209 , mTcCIR12188 , mTcCIR19286 , mTcCIR07150 , mTcCIR19310 ). The most common allele was mTcCIR12188 , which was associated with the contents of eicosanoic acid, moisture, fat and total polyphenols content. The mTcCIR28362 allele is associated with sensory characters bitterness, musty odor, and roasted odor. These alleles could be useful as molecular markers of chemical and sensory characteristics of cacao samples.- Published
- 2019
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6. Isolation and identification of marine strains of Stenotrophomona maltophilia with high chitinolytic activity.
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Salas-Ovilla R, Gálvez-López D, Vázquez-Ovando A, Salvador-Figueroa M, and Rosas-Quijano R
- Abstract
Chitin is the second most abundant organic compound in nature and represents a rich carbon and nitrogen source that is primarily transformed by bacterial communities. Bacteria capable of gradually hydrolyzing chitin into N-acetylglucosamine monomers can have applications in the transformation of residues from shrimp and other crustaceans. The objective of the present study was to isolate, characterize and identify microorganisms with high chitinolytic activity. These microorganisms were isolated and characterized based on macro- and microscopic morphological traits. Strains were selected on colloidal chitin agar medium primarily based on a hydrolysis halo larger than 2 mm and a growing phase no longer than 6 days. Secondary selection consisted of semi-quantitative evaluation of chitinolytic activity with a drop dilution assay. From the above, ten strains were selected. Then, strain-specific activity was evaluated. The B4 strain showed the highest specific activity, which was 6,677.07 U/mg protein. Molecular identification indicated that the isolated strains belong to the species Stenotrophomonas maltophilia ., Competing Interests: The authors declare there are no competing interests.
- Published
- 2019
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7. Characterization of Aloe vera -chitosan composite films and their use for reducing the disease caused by fungi in papaya Maradol.
- Author
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Monzón-Ortega K, Salvador-Figueroa M, Gálvez-López D, Rosas-Quijano R, Ovando-Medina I, and Vázquez-Ovando A
- Abstract
Composite films with Aloe vera (A), chitosan (Ch) and essential oils (EOs) were formulated. Six of the twelve combinations tested formed films: A70Ch30, A70Ch30-15, A60Ch40, A60Ch40-15, A50Ch50, and A50Ch50-15. The A60Ch40-15 film showed the best physicochemical characteristics as well as the greatest in vitro antifungal activity. Although the A90Ch10 and A80Ch20-15 mixtures did not form films, their solutions showed high antifungal activity in vitro. Based on multivariate analysis of the data, A60Ch40-15, A90Ch10 and A80Ch20-15 films were selected as coating treatments for papaya during storage at 30 ± 2 °C and 80% RH. Uncoated fruits (control 1) and treated with synthetic fungicide (control 2) were used as control. Coated fruits showed lower respiration rate, greater firmness and fewer changes in external coloration compared to control. Furthermore, these coatings reduced the incidence and severity of fungal disease by 40-50% compared to control 2. Aloe vera -chitosan films (A90Ch10 and A60Ch40-15), enriched with the EOs of cinnamon (10 mL L
-1 ) and thyme (10 mL L-1 ), improved quality of the fruit (higher firmness, lower CO2 content, less internal color change) with 50% less disease incidence during storage at room temperature.- Published
- 2018
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8. Production of cytotoxic compounds in dedifferentiated cells of Jatropha curcas L. (Euphorbiaceae).
- Author
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Ovando-Medina I, Pérez-Díaz LP, Ruiz-González S, Salvador-Figueroa M, Urbina-Reyes ME, and Adriano-Anaya L
- Abstract
This study addresses the in vitro culture as an alternative to obtain compounds with cytotoxic activity from the medicinal plant Jatropha curcas (Euphorbiaceae). We determined the presence of cytotoxic compounds in both whole plants and dedifferentiated cells. We evaluated the effect of auxin, cytokinins and light on callus induction in cotyledon explants. We found that the most effective combination to induce callus was the auxin 2,4-D (5 mM) with the cytokinin 6-BAP (2.5 mM), on Murashige-Skoog medium in darkness. We compared the callogenic potential among accessions from different geographic origins, finding that ARR-251107-MFG7 is most prone to form callus. The roots of J. curcas grown in field produced a compound chromatographically similar to the cytotoxic diterpene jatrophone. The profile of compounds extracted from the dedifferentiated cells was similar to that of the whole plant, including a relatively abundant stilbene-like compound. This study contributes to the future establishment of protocols to produce anti-cancer compounds from J. curcas cultivated in vitro., Competing Interests: The authors declare there are no competing interests.
- Published
- 2016
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9. Cacao alkaloids and polyphenols: Mechanisms that regulate their biosynthesis and its im- plications on the taste and aroma.
- Author
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Vazquez-Ovando A, Ovando-Medina I, Adriano-Anaya L, Betancur-Ancona D, and Salvador-Figueroa M
- Subjects
- Fermentation, Food Handling standards, Quality Control, Alkaloids biosynthesis, Cacao chemistry, Food Handling methods, Polyphenols biosynthesis, Taste
- Abstract
The flavor and aroma of cacao (Theobroma cacao) beans were the main reasons that promoted its domestication and food-use by pre-Columbian peoples of Mesoamerica. Polyphenols and alkaloids are compounds that directly affect the flavor of the cocoa beans and indirectly on the flavor precursors. The alkaloids are associated with bitterness; its concentration is related to the cultivar and its modifying through the processing. Polyphenols molecules are responsible together with other molecules of the astringency (not desirable in chocolate), but also are responsible for antioxidant properties, very desirable by consumers. This review focuses on aspects of the biosynthesis of these important molecules in cocoa beans as well as implications in taste and flavor. The changes of these molecules that occur during processing are also approached.
- Published
- 2016
10. Sex expression and floral diversity in Jatropha curcas: a population study in its center of origin.
- Author
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Adriano-Anaya Mde L, Pérez-Castillo E, Salvador-Figueroa M, Ruiz-González S, Vázquez-Ovando A, Grajales-Conesa J, and Ovando-Medina I
- Abstract
Sex expression and floral morphology studies are central to understand breeding behavior and to define the productive potential of plant genotypes. In particular, the new bioenergy crop Jatropha curcas L. has been classified as a monoecious species. Nonetheless, there is no information about its reproductive diversity in the Mesoamerican region, which is considered its center of origin and diversification. Thus, we determined sex expression and floral morphology in J. curcas populations from southern Mexico and Guatemala. Our results showed that most of J. curcas specimens had typical inflorescences with separate sexes (monoecious); meanwhile, the rest were atypical (gynoecious, androecious, andromonoecious, androgynomonoecious). The most important variables to group these populations, based on a discriminant analysis, were: male flower diameter, female petal length and male nectary length. From southern Mexico "Guerrero" was the most diverse population, and "Centro" had the highest variability among the populations from Chiapas. A cluster analysis showed that the accessions from southern Mexico were grouped without showing any correlation with the geographical origin, while those accessions with atypical sexuality were grouped together. To answer the question of how informative are floral morphological traits compared to molecular markers, we perform a Mantel correlation test between the distance matrix generated in this study and the genetic distance matrix (AFLP) previously reported for the same accessions. We found significant correlation between data at the level of accessions. Our results contribute to design genetic improvement programs by using sexually and morphologically contrasting plants from the center of origin.
- Published
- 2016
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11. Unique haplotypes of cacao trees as revealed by trnH-psbA chloroplast DNA.
- Author
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Gutiérrez-López N, Ovando-Medina I, Salvador-Figueroa M, Molina-Freaner F, Avendaño-Arrazate CH, and Vázquez-Ovando A
- Abstract
Cacao trees have been cultivated in Mesoamerica for at least 4,000 years. In this study, we analyzed sequence variation in the chloroplast DNA trnH-psbA intergenic spacer from 28 cacao trees from different farms in the Soconusco region in southern Mexico. Genetic relationships were established by two analysis approaches based on geographic origin (five populations) and genetic origin (based on a previous study). We identified six polymorphic sites, including five insertion/deletion (indels) types and one transversion. The overall nucleotide diversity was low for both approaches (geographic = 0.0032 and genetic = 0.0038). Conversely, we obtained moderate to high haplotype diversity (0.66 and 0.80) with 10 and 12 haplotypes, respectively. The common haplotype (H1) for both networks included cacao trees from all geographic locations (geographic approach) and four genetic groups (genetic approach). This common haplotype (ancient) derived a set of intermediate haplotypes and singletons interconnected by one or two mutational steps, which suggested directional selection and event purification from the expansion of narrow populations. Cacao trees from Soconusco region were grouped into one cluster without any evidence of subclustering based on AMOVA (F ST = 0) and SAMOVA (F ST = 0.04393) results. One population (Mazatán) showed a high haplotype frequency; thus, this population could be considered an important reservoir of genetic material. The indels located in the trnH-psbA intergenic spacer of cacao trees could be useful as markers for the development of DNA barcoding.
- Published
- 2016
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12. Reproductive biology of the biofuel plant Jatropha curcas in its center of origin.
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Rincón-Rabanales M, Vargas-López LI, Adriano-Anaya L, Vázquez-Ovando A, Salvador-Figueroa M, and Ovando-Medina I
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In this work, we studied the main characteristics of flowering, reproductive system and diversity of pollinators for the biofuel plant Jatropha curcas (L.) in a site of tropical southeastern Mexico, within its center of origin. The plants were monoecious with inflorescences of unisexual flowers. The male flowers produced from 3062-5016 pollen grains (266-647 per anther). The plants produced fruits with both geitonogamy and xenogamy, although insect pollination significantly increased the number and quality of fruits. A high diversity of flower visiting insects (36 species) was found, of which nine were classified as efficient pollinators. The native stingless bees Scaptotrigona mexicana (Guérin-Meneville) and Trigona (Tetragonisca) angustula (Latreille) were the most frequent visitors and their presence coincided with the hours when the stigma was receptive. It is noteworthy that the female flowers open before the male flowers, favoring xenogamy, which may explain the high genetic variability reported in J. curcas for this region of the world.
- Published
- 2016
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13. Sterility and Sexual Competitiveness of Tapachula-7 Anastrepha ludens Males Irradiated at Different Doses.
- Author
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Orozco-Dávila D, Adriano-Anaya Mde L, Quintero-Fong L, and Salvador-Figueroa M
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- Animals, Dose-Response Relationship, Radiation, Female, Male, Sex Characteristics, Gamma Rays, Infertility, Male, Pest Control, Biological methods, Sexual Behavior, Animal radiation effects, Tephritidae
- Abstract
A genetic sexing strain of Anastrepha ludens (Loew), Tapachula-7, was developed by the Mexican Program Against Fruit Flies to produce and release only males in programs where the sterile insect technique (SIT) is applied. Currently, breeding are found at a massive scale, and it is necessary to determine the optimum irradiation dose that releases sterile males with minimum damage to their sexual competitiveness. Under laboratory and field conditions, we evaluated the effects of gamma irradiation at doses of 0, 20, 40, 60 and 80 Gy on the sexual competitiveness of males, the induction of sterility in wild females and offspring survivorship. The results of the study indicate that irradiation doses have a significant effect on the sexual behavior of males. A reduction of mating capacity was inversely proportional to the irradiation dose of males. It is estimated that a dose of 60 Gy can induce more than 99% sterility in wild females. In all treatments, the degree of offspring fertility was correlated with the irradiation dose of the parents. In conclusion, the results of the study indicate that a dose of 60 Gy can be applied in sterile insect technique release programs. The application of this dose in the new genetic sexing strain of A. ludens is discussed.
- Published
- 2015
- Full Text
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