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  • 1
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    Online Resource
    EFECTO DEL ÁCIDO SALICÍLICO Y METIL JASMONATO SOBRE Colletotrichum sp. EN FRUTOS DE MANGO
    Universidad Autonoma de Yucatan. Facultad de Medicina Veterinaria y Zootecnia ; 2021
    In:  Tropical and Subtropical Agroecosystems Vol. 24, No. 2 ( 2021-04-13)
    Details
    In: Tropical and Subtropical Agroecosystems, Universidad Autonoma de Yucatan. Facultad de Medicina Veterinaria y Zootecnia, Vol. 24, No. 2 ( 2021-04-13)
    Abstract: 〈 p 〉 〈 strong 〉 Background 〈 /strong 〉 : mango anthracnose, caused by 〈 em 〉 Colletotrichum gloeosporioides 〈 /em 〉 , is the main mango disease in pre and post-harvest. Mainly synthetic fungicides have been used in its management, which has negatively impacted the environment and the health of workers. The induction of resistance in fruits by biological, physical or chemical means is considered a sustainable and safe strategy for the management of post-harvest diseases of fruits and vegetables. Methyl jasmonate (MeJa) and salicylic acid (AS) are natural and safe compounds that represent a promising alternative in post-harvest control. 〈 strong 〉 Objectives 〈 /strong 〉 : to determine the effect of MeJa and AS on mycelial growth and spore germination of 〈 em 〉 Colletotrichum 〈 /em 〉 sp., under 〈 em 〉 in vitro 〈 /em 〉 conditions, and to evaluate the effect on development of postharvest damage caused by the pathogen in mango fruits treated with MeJa and AS. 〈 strong 〉 Methodology 〈 /strong 〉 : the activity of MeJa and AS in the germination of spores and the mycelial growth of 〈 em 〉 Colletotrichum 〈 /em 〉 sp., were evaluated in culture medium Broth Papa Dextrose and Papa Dextrose Agar, respectively. Healthy mango fruits were treated by immersion with MeJa and AS solutions at 1 and 10 mM for 5 min, and 24 h later they were inoculated with 〈 em 〉 Colletotrichum 〈 /em 〉 sp., to evaluate the effect on the diameter of the lesion caused by the fungus to the 6 and 12 days after inoculation (dai). 〈 strong 〉 Results 〈 /strong 〉 : MeJa and AS inhibited the germination of 〈 em 〉 Colletotrichum 〈 /em 〉 sp., 〈 em 〉 〈 /em 〉 spores after 24 hours of incubation 〈 em 〉 in vitro 〈 /em 〉 , while the mycelial growth of the fungus in PDA medium, 1 and 10 mM of MeJa and AS, showed significant reductions in growth in comparison to control. In fruits, it was observed that the 10 mM MeJA and AS treatments significantly reduced the diameter of the lesion caused by the fungus, compared to the control fruits at 12 dai. 〈 strong 〉 Implications 〈 /strong 〉 : future trials should evaluate other concentrations of MeJa and AS in other mango varieties to assess the response to anthracnose. 〈 strong 〉 Conclusions 〈 /strong 〉 : MeJa and AS inhibited spore germination and mycelial growth of 〈 em 〉 Colletotrichu 〈 /em 〉 sp., 〈 em 〉 〈 /em 〉 under 〈 em 〉 in vitro 〈 /em 〉 conditions, while in mango fruits these inducers significantly reduced the diameter of the lesion caused by this fungus, which suggests that both products can reduce the damage caused by 〈 em 〉 Colletotrichum 〈 /em 〉 sp., in mango fruits. 〈 /p 〉
    Type of Medium: Online Resource
    ISSN: 1870-0462
    URL: Article
    DOI: 10.56369/tsaes.3494
    Language: Unknown
    Publisher: Universidad Autonoma de Yucatan. Facultad de Medicina Veterinaria y Zootecnia
    Publication Date: 2021
    detail.hit.zdb_id: 2486562-X
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  • 2
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    Online Resource
    TAMAÑO DEL GENOMA Y CARIOTIPO EN Agave angustifolia Y A. rhodacantha DE SONORA, MÉXICO
    Sociedad Mexicana de Fitogenetica A.C ; 2007
    In:  Revista Fitotecnia Mexicana Vol. 30, No. 1 ( 2007-03-29), p. 13-
    Details
    In: Revista Fitotecnia Mexicana, Sociedad Mexicana de Fitogenetica A.C, Vol. 30, No. 1 ( 2007-03-29), p. 13-
    Abstract: El contenido de ADN nuclear en tejido foliar de tres poblaciones silvestres de Agave angustifolia y dos de Agave rhodacantha del municipio de Nácori Chico, Sonora, México, se determinó mediante citometría de flujo. Todos los especímenes en las dos especies fueron diploides (2n = 2x = 60). El contenido promedio 2C-ADN nuclear fue de 8.499 pg (1Cx = 4165 Mpb) en A. angustifolia y de 8.415 pg (1Cx = 4124 Mpb) en A. rhodacantha. El contenido promedio 2C-ADN de las tres poblaciones de A. angustifolia y una de A. rhodacantha (El Bajío) fueron iguales, pero estadísticamente diferentes de la población de Los Mochomos de A. rhodacantha. Los cariotipos de las poblaciones de A. angustifolia de Los Mochomos y El Chorro, mostraron el mismo citotipo (48m + 2sm + 6st + 4t), el cual fue diferente en El Bajío (42m + 4sm + 10st + 4t). Las dos poblaciones de A. rhodacantha tuvieron el mismo cariotipo (40m + 6sm + 4st + 10t). La longitud total del genoma (LTG) y el índice de asimetría (TF %) variaron significativamente entre las poblaciones de las dos especies de agave, con excepción de LTG entre las poblaciones de A. rhodacantha. Los valores de LTG fueron mayores en A. rhodacantha que en A. angustifolia y en TF % ocurrió lo contrario. Estos resultados se consideran básicos para el desarrollo de estrategias biotecnológicas y mejoramiento genético de estas especies.  
    Type of Medium: Online Resource
    ISSN: 0187-7380
    URL: Article
    DOI: 10.35196/rfm.2007.1.13
    Language: Unknown
    Publisher: Sociedad Mexicana de Fitogenetica A.C
    Publication Date: 2007
    detail.hit.zdb_id: 2256654-5
    SSG: 7,36
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  • 3
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    Online Resource
    EVAPOTRANSPIRACIÓN Y COEFICIENTE DE CULTIVO EN CHILE BANANA (Capsicum annuum L.) EN EL VALLE DEL YAQUI, MÉXICO
    Universidad de Sonora ; 2011
    In:  BIOtecnia Vol. 13, No. 3 ( 2011-12-30), p. 28-
    Details
    In: BIOtecnia, Universidad de Sonora, Vol. 13, No. 3 ( 2011-12-30), p. 28-
    Type of Medium: Online Resource
    ISSN: 1665-1456 , 1665-1456
    URL: Article
    DOI: 10.18633/bt.v13i3.97
    Language: Unknown
    Publisher: Universidad de Sonora
    Publication Date: 2011
    detail.hit.zdb_id: 3048028-0
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  • 4
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    Online Resource
    Colletotrichum karstii : causal agent of anthracnose of Dendrobium nobile in Mexico
    Informa UK Limited ; 2020
    In:  Canadian Journal of Plant Pathology Vol. 42, No. 4 ( 2020-10-01), p. 514-519
    Details
    In: Canadian Journal of Plant Pathology, Informa UK Limited, Vol. 42, No. 4 ( 2020-10-01), p. 514-519
    Type of Medium: Online Resource
    ISSN: 0706-0661 , 1715-2992
    URL: Article
    DOI: 10.1080/07060661.2020.1731711
    Language: English
    Publisher: Informa UK Limited
    Publication Date: 2020
    detail.hit.zdb_id: 2096822-X
    SSG: 12
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  • 5
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    Análisis filogenético multilocus del complejo fúngico asociado a pudrición radicular de sandía en Sonora, México
    Revista Mexicana de Fitopatologia, Mexican Journal of Phytopathology ; 2018
    In:  Revista Mexicana de Fitopatología, Mexican Journal of Phytopathology Vol. 36, No. 2 ( 2018-03-13)
    Details
    In: Revista Mexicana de Fitopatología, Mexican Journal of Phytopathology, Revista Mexicana de Fitopatologia, Mexican Journal of Phytopathology, Vol. 36, No. 2 ( 2018-03-13)
    Abstract: 〈 p 〉 El estado de Sonora es uno de los principales productores de sandía en México. Cada año, los productores locales enfrentan problemas fitosanitarios, provocados principalmente por hon­gos del suelo. En el presente estudio se analizó la presencia de hongos patógenos asociados con pudrición de raíz en plantas de sandía en las dos zonas de mayor producción en Sonora. El análisis morfológico reveló la presencia de tres géneros de hongos: 〈 em 〉 Fusarium 〈 /em 〉 (73%), 〈 em 〉 Ceratobasidium 〈 /em 〉 (20%) y 〈 em 〉 Rhizoctonia 〈 /em 〉 (6%). Mediante un análisis filogenéti­co multilocus (ITS1, TEF y RPB2 para 〈 em 〉 Fusarium 〈 /em 〉 ; ITS1 y RPB2 para 〈 em 〉 Rhizoctonia 〈 /em 〉 y 〈 em 〉 Ceratobasidium 〈 /em 〉 ), se identificó a: 〈 em 〉 F. falciforme, F. brachygibbosum 〈 /em 〉 y 〈 em 〉 F. oxysporum 〈 /em 〉 ; además de dos grupos anastomósi­cos de 〈 em 〉 Ceratobasidium 〈 /em 〉 sp. (AG-F y AG-A) y dos de 〈 em 〉 Rhizoctonia 〈 /em 〉 sp. (AG-4 y AG-6). Aislados repre­sentativos de estas cinco especies causaron pudri­ción de raíz y marchitez de plántulas de sandía a los 21 días después de su inoculación. En este estudio se informa por primera vez de 〈 em 〉 F. falciforme 〈 /em 〉 y se define a nivel de grupos anastomósicos las cepas de 〈 em 〉 Rhizoctonia 〈 /em 〉 y 〈 em 〉 Ceratobasidium 〈 /em 〉 como causantes de pudrición radicular en sandía en la región. 〈 /p 〉
    Type of Medium: Online Resource
    ISSN: 2007-8080
    URL: Article
    DOI: 10.18781/R.MEX.FIT.1710-1
    Language: Unknown
    Publisher: Revista Mexicana de Fitopatologia, Mexican Journal of Phytopathology
    Publication Date: 2018
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  • 6
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    Online Resource
    FERTILIZACIÓN ORGANICA Y SU IMPACTO EN LA CALIDAD DEL SUELO
    Universidad de Sonora ; 2018
    In:  Biotecnia Vol. 21, No. 1 ( 2018-12-23), p. 87-92
    Details
    In: Biotecnia, Universidad de Sonora, Vol. 21, No. 1 ( 2018-12-23), p. 87-92
    Abstract: Uno de los mayores retos para la agricultura es producir alimentos para una población creciente con recursos limitados. Bajo esta premisa, la agricultura convencional, con un uso intensivo del suelo, afecta la calidad del recurso y junto con otras problemáticas ambientales, ha abierto camino a la agricultura orgánica como un sistema productivo que permite reducir los impactos relacionados. En este trabajo se planteó el objetivo de mejorar la calidad de un suelo con prácticas de producción orgánica como rotación de cultivos, uso de fertilizantes orgánicos, labranza mínima y aplicación de hongos micorrízicos arbusculares (HMA). Se utilizaron tres tratamientos: lombricomposta con HMA, composta de estiércol con HMA y HMA sin abonos para evaluar su efecto durante dos cultivos sucesivos, melón y maíz. Se efectuaron muestreos para analizar estabilidad de agregados en agua, colonización micorrízica, y materia orgánica durante el ensayo. En todos los tratamientos se observó una mejora de la calidad del suelo, sin embargo, la adición de lombricomposta se destacó por mejorar varios aspectos al mismo tiempo. La colonización micorrízica se incrementó un 44% en maíz y se redujo un 21% en melón para el caso del abonado con lombricomposta. La estabilidad de los agregados se incrementó en los tratamientos con materia orgánica, sin embargo, el efecto no mostró permanencia
    Type of Medium: Online Resource
    ISSN: 1665-1456 , 1665-1456
    URL: Article
    DOI: 10.18633/biotecnia.v21i1.817
    Language: Unknown
    Publisher: Universidad de Sonora
    Publication Date: 2018
    detail.hit.zdb_id: 3048028-0
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  • 7
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    Online Resource
    Actividad in vitro de promoción del crecimiento vegetal y control biológico de rizobacterias aisladas de zacate bermuda ruderal
    Revista Mexicana de Ciencias Agricolas ; 2019
    In:  Revista Mexicana de Ciencias Agrícolas Vol. 10, No. 2 ( 2019-03-22), p. 311-324
    Details
    In: Revista Mexicana de Ciencias Agrícolas, Revista Mexicana de Ciencias Agricolas, Vol. 10, No. 2 ( 2019-03-22), p. 311-324
    Abstract: Actualmente, el uso de bacterias promotoras de crecimiento vegetal resulta una alternativa viable al uso indiscriminado de agroquímicos. Con el fin de obtener bacterias con capacidad de promoción del crecimiento vegetal, en este trabajo se aislaron doce cepas con actividad de fijación de nitrógeno a partir de la rizósfera de zacate bermuda (Cyonodon dactylon) ruderal. Con base en la rapidez e intensidad del cambio de color en la prueba cualitativa de fijación del nitrógeno, se seleccionaron dos aislados para su identificación molecular y caracterización. La amplificación, secuenciación y análisis de fragmentos del gen ribosomal 16S rRNA permitió identificar a Pseudomonas monteilii (Pm0710) y Chryseobacterium massiliae ca (Cm0711). Ambos aislados mostraron actividad de solubilización de fosfatos, de producción de ácido indol-3-acético, ácido giberélico y sideróforos, de fosfatasa alcalina y ACC deaminasa, así como de inhibición contra: Fusarium brachygibbosum, F. falciforme, F. oxysporum y Ceratobasidium sp. Aunque Cm0711 fue significativamente superior que Pm0710 en la mayoría de las propiedades analizadas, las dos bacterias tienen potencial para ser utilizadas como bioinoculantes; sin embargo, antes se debe realizar su validación in vivo.
    Type of Medium: Online Resource
    ISSN: 2007-9230 , 2007-0934
    URL: Article
    DOI: 10.29312/remexca.v10i2.1541
    Language: Unknown
    Publisher: Revista Mexicana de Ciencias Agricolas
    Publication Date: 2019
    detail.hit.zdb_id: 2582680-3
    SSG: 7,36
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  • 8
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    BACTERIAS DE LA RIZOSFERA DE GARBANZO CON CAPACIDAD ANTAGÓNICA A HONGOS FITOPATÓGENOS Y DE PROMOCIÓN DEL CRECIMIENTO DE LA PLANTA
    Universidad Autonoma de Yucatan. Facultad de Medicina Veterinaria y Zootecnia ; 2018
    In:  Tropical and Subtropical Agroecosystems Vol. 21, No. 3 ( 2018-12-18)
    Details
    In: Tropical and Subtropical Agroecosystems, Universidad Autonoma de Yucatan. Facultad de Medicina Veterinaria y Zootecnia, Vol. 21, No. 3 ( 2018-12-18)
    Abstract: 〈 p 〉 The disease known as "chickpea rabies", caused by 〈 em 〉 Fusarium oxysporum 〈 /em 〉 , 〈 em 〉 Fusarium solani 〈 /em 〉 and 〈 em 〉 Rhizoctonia solani 〈 /em 〉 , is one of the main limitations of chickpea production in Mexico. Traditionally, chemical control has been used, which has negative impact on agroecosystems. Biological control is an ecological alternative for the management of plant diseases by the use of antagonistic bacteria and fungi. The objective of the present investigation was to isolate and identify rhizobacteria of chickpea plants with 〈 em 〉 in vitro 〈 /em 〉 antagonistic capacity towards 〈 em 〉 F. oxysporum 〈 /em 〉 , 〈 em 〉 F. solani 〈 /em 〉 and 〈 em 〉 R. solani 〈 /em 〉 and plant growth promotion. The ability of the isolates to produce siderophores, gibberellic acid and solubilize phosphorus was evaluated. Sixty-seven bacterial isolates were obtained, of which two (AG-B007 and AG-B038) were selected because of strong 〈 em 〉 in vitro 〈 /em 〉 antagonism towards 〈 em 〉 F. oxysporum 〈 /em 〉 , 〈 em 〉 F. solani 〈 /em 〉 and 〈 em 〉 R. solani 〈 /em 〉 . These isolates presented siderophore production in CAS medium, solubilization of inorganic phosphorus in ranges of 164 to 171 μg mL 〈 sup 〉 -1 〈 /sup 〉 and gibberellic acid in values of 29 to 55 μg mL 〈 sup 〉 -1 〈 /sup 〉 . The inoculation of the AG-B007 and AG-B038 isolates promoted growth in chickpea plants under greenhouse conditions. The two isolates were identified as belonging to the genus 〈 em 〉 Bacillus 〈 /em 〉 by sequencing the 16S RNAr gene. 〈 /p 〉
    Type of Medium: Online Resource
    ISSN: 1870-0462
    URL: Article
    DOI: 10.56369/tsaes.2548
    Language: Unknown
    Publisher: Universidad Autonoma de Yucatan. Facultad de Medicina Veterinaria y Zootecnia
    Publication Date: 2018
    detail.hit.zdb_id: 2486562-X
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  • 9
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    Online Resource
    VARIACION EN EL ESTATUS MICORRIZICO DE LEGUMINOSAS DEL DESIERTO SONORENSE/ MYCORRHIZIC STATUS AND ITS VARIATION ON LEGUMES OF THE SONORAN DESERT
    Universidad de Sonora ; 2016
    In:  BIOtecnia Vol. 18, No. 1 ( 2016-04-30), p. 52-
    Details
    In: BIOtecnia, Universidad de Sonora, Vol. 18, No. 1 ( 2016-04-30), p. 52-
    Type of Medium: Online Resource
    ISSN: 1665-1456 , 1665-1456
    URL: Article
    DOI: 10.18633/bt.v18i1.244
    Language: Unknown
    Publisher: Universidad de Sonora
    Publication Date: 2016
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  • 10
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    Online Resource
    Mortality reduction in older COVID-19-patients hospitalized in Spain during the second pandemic wave from the SEMI-COVID-19 Registry
    Springer Science and Business Media LLC ; 2023
    In:  Scientific Reports Vol. 13, No. 1 ( 2023-10-18)
    Details
    In: Scientific Reports, Springer Science and Business Media LLC, Vol. 13, No. 1 ( 2023-10-18)
    Abstract: In 2020, the COVID-19 pandemic followed a two-wave pattern in most countries. Hospital admission for COVID-19 in one wave or another could have affected mortality, especially among the older persons. The objective of this study was to evaluate whether the admission of older patients during the different waves, before SARS-CoV-2 vaccination was available, was associated with a different mortality. We compared the mortality rates of patients hospitalized during 2020 before (first wave) and after (second wave) July 7, 2020, included in the SEMI-COVID-19 Registry, a large, multicenter, retrospective cohort of patients admitted to 126 Spanish hospitals for COVID-19. A multivariate logistic regression analysis was performed to control for changes in either the patient or disease profile. As of December 26, 2022, 22,494 patients had been included (17,784 from the first wave and 4710 from the second one). Overall mortality was 20.4% in the first wave and 17.2% in the second wave (risk difference (RD) − 3.2%; 95% confidence interval (95% CI) − 4.4 to − 2.0). Only patients aged 70 and older (10,973 patients: 8571 in the first wave and 2386 in the second wave) had a significant reduction in mortality (RD − 7.6%; 95% CI − 9.7 to − 5.5) (unadjusted relative risk reduction: 21.6%). After adjusting for age, comorbidities, variables related to the severity of the disease, and treatment received, admission during the second wave remained a protective factor. In Spain, patients aged 70 years and older admitted during the second wave of the COVID-19 pandemic had a significantly lower risk of mortality, except in severely dependent persons in need of corticosteroid treatment. This effect is independent of patient characteristics, disease severity, or treatment received. This suggests a protective effect of a better standard of care, greater clinical expertise, or a lesser degree of healthcare system overload.
    Type of Medium: Online Resource
    ISSN: 2045-2322
    URL: Article
    DOI: 10.1038/s41598-023-42735-5
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2023
    detail.hit.zdb_id: 2615211-3
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