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      La diversidad de macromicetos y mixomicetos de Colima, México, con registros nuevos Translated title: The diversity of macrofungi and slime moldsfrom Colima, Mexico, with new records

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          Abstract

          Resumen La diversidad fúngica de Colima, México ha sido escasamente estudiada con solo 80 especies de hongos macroscópicos no liquenizados y 2 especies de mixomicetos reportadas. La mayoría de los registros corresponden al siglo pasado y se han enfocado en las zonas templadas del estado. Se presenta un estudio de la diversidad de hongos macroscópicos y mixomicetos en Colima, México, con registros nuevos. Se llevaron a cabo muestreos en 8 localidades de 6 municipios, incluyendo zonas urbanas. Se adicionan 38 registros nuevos, de los cuales 5 pertenecen a Ascomycota, 21 a Basidiomycota y 12 a mixomicetos. Los géneros mejor representados en los muestreos fueron Geastrum (5 especies) y Didymium (3 especies). Geastrum chamelense e Itajahya galericulata corresponden al segundo y tercer registro nacional, respectivamente. Se aumenta a 106 el número de registros de especies de hongos y a 14 el de mixomicetos, dando un total de 120 taxones. Se sugiere realizar muestreos más extensos en zonas no exploradas, con énfasis en los grupos de hongos menos estudiados, tales como ascomicetos y basidiomicetos como hongos ramarioides, gasteroides y gelatinosos, así como cultivos en cámara húmeda para mixomicetos.

          Translated abstract

          Abstract The fungal diversity in Colima, Mexico has been sparsely studied with only 80 species of non-lichenized macroscopic fungi species and two slime molds reported. Most of the records are from the last century and have focused on the temperate zones of the state. A study of the macroscopic fungi and slime molds diversity in Colima, México is presented, with new records. Samplings were carried-out in 8 localities across 6 municipalities, including urban zones. We add 38 new records of which, 5 correspond to Ascomycota, 21 to Basidiomycota, 12 slime molds. The most well-represented genera in the samplings were Geastrum (5 species) and Didymium (3 species). Geastrum chamelense and Itajahya galericulata constitute the second and the third national records, respectively. The number of records is raised to 106 macroscopic fungal species and 14 slime molds species, with a total of 120 taxa. It is suggested to conduct more extensive sampling in unexplored areas, with an emphasis on the less-studied fungal groups such as ascomycetes and basidiomycetes, such as ramarioid, gasteroid and jelly fungi, as well as cultures in humid chambers for slime molds.

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          Insulin-releasing and insulin-like activity of Agaricus campestris (mushroom).

          Agaricus campestris (mushroom) has been documented as a traditional treatment for diabetes. Here the administration of mushroom in the diet (62.5 g/kg) and drinking water (2.5 g/l) countered the hyperglycaemia of streptozotocin-diabetic mice. An aqueous extract of mushroom (1 mg/ml) stimulated 2-deoxyglucose transport (2.0-fold), glucose oxidation (1.5-fold) and incorporation of glucose into glycogen (1.8-fold) in mouse abdominal muscle. In acute 20 min tests, 0.25-1 mg/ml aqueous extract of mushroom evoked a stepwise 3.5- to 4.6-fold stimulation of insulin secretion from the BRIN-BD11 pancreatic B-cell line. This effect was abolished by 0.5 mM diazoxide and prior exposure to extract did not affect subsequent stimulation of insulin secretion by 10 mM L-alanine, thereby negating a detrimental effect on cell viability. The effect of extract was potentiated by 16.7 mM glucose, L-alanine (10 mM) and IBMX (1 mM), and a depolarising concentration of KCl (25 mM) did not augment the insulin-releasing activity of mushroom. Activity of the extract was found to be heat stable, acetone soluble and unaltered by exposure to alkali, but decreased with exposure to acid. Dialysis to remove components with molecular mass < 2000 Da caused a 40% reduction in activity. Sequential extraction with solvents revealed insulin-releasing activity to be greatest in polar fractions. Lack of haemagglutinin activity with extract activity indicated that activity was unlikely to be due to a lectin-mediated event. These results demonstrate the presence of antihyperglycaemic, insulin-releasing and insulin-like activity in A. campestris.
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            Biodiversidad de hongos en México

            Se presenta un análisis del conocimiento de la diversidad de hongos en México basado en revisiones bibliográficas disponibles, así como una estimación comparativa de las especies de macro- y microhongos que se conocen tanto en México como a nivel mundial. Actualmente se estima que en nuestro país hay 200 000 especies de hongos y tomando en cuenta los datos analizados para este trabajo, el conocimiento es de aproximadamente el 5%. La entidad federativa con mayor número de registros es Veracruz, seguida de Jalisco y Estado de México. Se discute la problemática para cuantificar las especies y se recomiendan algunas estrategias para solucionarla, como son la realización de estudios sistemáticos de todos los biomas del país, tomando en cuenta los hábitats y microhábitats presentes en cada uno de ellos, la formación de muchos más taxónomos especializados en micología y el fortalecimiento de las colecciones de hongos, entre otras estrategias.
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              Recognition of hypoxyloid and xylarioid Entonaema species and allied Xylaria species from a comparison of holomorphic morphology, HPLC profiles, and ribosomal DNA sequences

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                Author and article information

                Journal
                rmbiodiv
                Revista mexicana de biodiversidad
                Rev. Mex. Biodiv.
                Instituto de Biología (México, DF, Mexico )
                1870-3453
                2007-8706
                2023
                : 94
                : e945109
                Affiliations
                [1] orgnameUniversidad Nacional Autónoma de México orgdiv1Instituto de Biología orgdiv2Departamento de Botánica Mexico
                [2] Tecomán orgnameUniversidad de Colima orgdiv1Facultad de Ciencias Biológicas y Agropecuarias Mexico
                [3] Miguel Hidalgo Ciudad de México orgnameInstituto Politécnico Nacional orgdiv1Escuela Nacional de Ciencias Biológicas orgdiv2Departamento de Botánica Mexico
                [4] orgnameUniversidad Nacional Autónoma de México orgdiv1Facultad de Ciencias, Laboratorios de Micología orgdiv2Laboratorio de Taxonomía de hongos tremeloides (Heterobasidiomycetes) Mexico
                Article
                S1870-34532023000100420 S1870-3453(23)09400000420
                10.22201/ib.20078706e.2023.94.5109
                2b99fc3c-aa87-4b4c-b7c2-032c9ba58839

                This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

                History
                : 22 August 2022
                : 11 September 2023
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 143, Pages: 0
                Product

                SciELO Mexico

                Categories
                Taxonomía y sistemática

                Mycetozoa,Funga,Diversidad fúngica,Ascomycota,Basidiomycota,Fungal diversity

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