The patterns of distribution of twenty-seven species of pteridophytes were studied, as possible indicators of environment deterioration in the temperate forest of San Jeronimo Amanalco, Texcoco, Mexico State. The presence and abundance of Pteridophyta was related with edaphic, topographic and vegetation variables at 100 sampling sites in an area of...
El complejo México-Centroamericano de Polypodium plesiosorum, a decir de varios autores, es una mezcla heterogénea de especies cuya delimitación taxonómica no es satisfactoria. Con el afán de aclarar algunos de los problemas taxonómicos y de relación infragenérica en este grupo de helechos, se llevó a cabo un estudio morfo-anatómico comparativo...
Algunos metales pesados son micronutrientes para las plantas, pero en concentraciones que rebasan dichas necesidades se vuelven tóxicos. Los helechos son metalofitas capaces de tolerar estas condiciones mediante mecanismos de evasión, exclusión y/o acumulación de los metales. Este estudio determinó la toxicidad del plomo (Pb), cobre (Cu) y zinc (Zn)...
The genus Fomitiporia was described by Murrill (1907) and included 17 species with basidiomata perennial and resupinate, hymenophore poroid, context brown color and the basidiospores globoses and hyaline. This genus was considered as a synonym of Fomes, Poria or Phellinus, however, today, several authors have confirmed the delimitation of the...
In Mexico there are a large number of plants of which there is, in general, little knowledge of their structure and properties, which is an urgent need to attend. Ferns are an example of this, specifically the Gleicheniaceae family, because it is represented by several species whose anatomical description and...
Ferns and lycophytes have different reproductive strategies that enable them to invade disturbed habitats and areas without vegetation. In this work, the presence, abundance and reproductive strategies of ferns that grow in soils of temperate forests in the Sierra Nevada, State of Mexico were studied. Four areas were chosen, in...
La micorriza arbuscular (MA) está formada por hongos del Phylum Glomeromycota, los cuales establecen relaciones simbióticas con el 9 0% de las especies de plantas terrestres, influyendo en la diversidad vegetal y la productividad en los ecosistemas naturales. La diversidad de morfotipos de los hongos micorrizógenos arbusculares (HMA) y, por...