Arbuscular mycorrhizal fungi in a coastal wetland in Yucatan, Mexico

Abstract

Background: The wetlands provide important ecosystem services, but also represent a limiting environment for the organisms which are distributed there. However, these limiting factors can be overcome thanks to the biotic interactions established by the organisms. Study species:Acoelorraphe wrightii is a palm inhabiting coastal wetlands and is found to be associated with arbuscular mycorrhizal fungi. Question:The dynamic of the colonization by arbuscular mycorrhizal (AM) fungi of A. wrightii roots was evaluated, as well as the production of spores and the richness of AM fungal species in A. wrightii rhizosphere.Study site: During the dry season (February-May), adult individuals of A. wrightii were selected in a wetland located in Yucatan, Mexico.Methods: Roots and rhizospheric soil were collected from the A. wrightii individuals collected in order to evaluate mycorrhizal colonization of the roots and to estimate the amount and identity of spores.Results: Colonization by AMF in A. wrightii roots was found between 24 and 67 %. Significant differences were found in percentage of colonization for the different months sampled. Number of spores showed no variation in the time, and 22 species of AMF were identified, the most represented being Glomeraceae. Conclusions:The colonization of A. wrightii roots by AM fungi throughout all the sampling months suggests that the interaction is important for the plant. A high richness of AMF species in its rhizosphere was found with the presence of some exclusive species at the beginning and end of the rainy season.Key words: Acoelorraphe wrightii, mycorrhizal colonization, richness of AMF species, spores, temporality. ResumenAntecedentes: Los humedales proveen de importantes servicios ecosistémicos pero también representan un ambiente limitante para los organismos que ahí se distribuyen. Las limitantes pueden ser superadas gracias a las interacciones bióticas que establecen. Especie de estudio:Acoelorraphe wrightii es una palmera que habita los humedales costeros y se encuentra asociada con hongos micorrizógenos arbusculares.Pregunta: Se evaluó la dinámica de la colonización por hongos micorrizógenos arbusculares (HMA) de las raíces de A. wrightii, la producción de esporas y la riqueza de especies de HMA en su rizósfera.Sitio de estudio: Durante la temporada de sequía (febrero-mayo), individuos adultos de A. wrightii fueron seleccionados en un humedal localizado en Yucatán, México.Métodos: Se colectaron raíces y suelo rizosférico de individuos seleccionados de A. wrightii, para evaluar la colonización micorrízica de las raíces y estimar la cantidad de esporas y su identidad.Resultados: La colonización por HMA en las raíces de A. wrightii se encontró entre 24 y 67 %. Se encontraron diferencias significativas en el porcentaje de colonización en los diferentes meses muestreados. El número de esporas no mostró una variación en el tiempo identificándose 22 especies de HMA, siendo la familia Glomeraceae la mejor representada.Conclusiones: La colonización de las raíces de A. wrig...

Inorganic Phosphate Solubilization by a Novel Isolated Bacterial Strain Enterobacter sp. ITCB-09 and Its Application Potential as Biofertilizer

“…For statistical analysis of these results, a mixed linear model was used, with treatments and substrates (Table 1) considered fixed factors and time and measurement intervals as the random factors. The Type III sum of squares was selected because, during the experiment, the design became unbalanced [44], since not all the seedlings germinated. Significance values for paired comparisons (e.g., between treatments) were obtained using Bonferroni's correction (p < 0.001); this was done with the lme function and the REML method was applied in program R 3.24 [43].…”

Exploring plant root-fungal interactions in a neotropical freshwater wetland

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Dry-Season Soil and Co-Cultivated Host Plants Enhanced Propagation of Arbuscular Mycorrhizal Fungal Spores from Sand Dune Vegetation in Trap Culture

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