Endorhizal fungal symbiosis in lycophytes and metal(loid)-accumulating ferns growing naturally in mine wastes in Mexico.

Ferns and lycophytes are pioneer plants that can be useful for revegetation. Their natural distribution and interaction with soil fungal endophytes can increase plant fitness but have received little attention. This study aimed to identify these plant species in mine wastes, and determine colonization by arbuscular mycorrhizal fungi (AMF) and dark septate endophytes (DSE).

Folates in legume root nodules.

Folates are multifunctional metabolites in plants that are essential for cell division, nucleic acids and amino acid synthesis. During symbiotic nitrogen fixation in legumes, these cofactors are needed for de novo purine biosynthesis, meaning that changes in the folate pools could directly affect the flow of fixed nitrogen to the plant. Its role related to symbiotic nitrogen fixation has not been yet explored, but recent data suggest a relevant role during the first steps.

, a new species of arbuscular mycorrhizal fungi from semiarid regions in Mexico.

is here described as a new species of arbuscular mycorrhizal fungi (AMF; Glomeromycota) based on morphological and phylogenetic analyses. It was isolated from rhizospheric soil of two endemic Mexican legumes: and , which grow in semiarid regions of central Mexico. is characterized by forming globose spores of (154.

Endemic Mimosa species from Mexico prefer alphaproteobacterial rhizobial symbionts.

The legume genus Mimosa has > 500 species, with two major centres of diversity, Brazil (c. 350 spp.) and Mexico (c.

Prosopis laevigata and Mimosa biuncifera (Leguminosae), jointly influence plant diversity and soil fertility of a Mexican semiarid ecosystem.

Prosopis laevigata and Mimosa biuncifera are frequently found in arid and semiarid shrublands, but scarce information is available about their influence on plant community structure and soil fertility. We compared plant community structure, diversity and soil nutrients of three semiarid shrubland sites located in Mezquital Valley, Mexico. These sites differ in their dominant species: Site 1 (Bingu) P.