Septoglomus mexicanum, a new species of arbuscular mycorrhizal fungi from semiarid regions in Mexico
Por:
Chimal-Sanchez, Eduardo, Senes-Guerrero, Carolina, Varela, Lucia, Manuel Montano, Noe, Garcia-Sanchez, Rosalva, Pacheco, Adriana, Montano-Arias, Susana A., Lucia Camargo-Ricalde, Sara
Publicada:
2 ene 2020
Ahead of Print:
1 nov 2019
Resumen:
Septoglomus mexicanum 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: Prosopis laevigata and Mimosa luisana, which
grow in semiarid regions of central Mexico. Septoglomus mexicanum is
characterized by forming globose spores of (154.5-)202.8(-228.9) mu m
diam and a spore wall consisting of four layers (SWL1-SWL4): outer wall
layer (SWL1) hyaline, evanescent, (1.7-)3.2(-4.3) mu m thick; SWL2
laminate and smooth, orange to reddish orange, (3.1-)4.5(-6.1) mu m
thick; SWL3 laminate, smooth, reddish orange to reddish brown,
(4.1-)5.1(-5.7) mu m thick; and SWL4 hyaline, semiflexible,
(0.93-)1.2(-1.4) mu m thick. None of the spore wall layers stain with
Melzer's reagent. The subtending hypha has a color from yellowish to
golden and presents a septum on spore base. Septoglomus mexicanum can be
distinguished from all other Septoglomus species by spore size and
color, by spore wall structure (four layers), and by color change of the
subtending hypha. Phylogenetic analysis based on the AMF extended DNA
barcode covering a 1.5-kb fragment of the small subunit (SSU), internal
transcribed spacer region (ITS1-5.8S-ITS2), and the large subunit (LSU)
of rRNA genes places S. mexicanum in the genus Septoglomus, separated
from other described Septoglomus species, especially S. turnauae, with
whom it could be confused morphologically. All available sequences in
public databases suggest that this new fungal species has not yet been
previously detected. Thus, there are currently 149 Glomeromycota species
registered in Mexico, representing 47.4% of the known species
worldwide.
Filiaciones:
Chimal-Sanchez, Eduardo:
Univ Autonoma Metropolitana Iztapalapa, Dept Biol, Div Ciencias Biol & Salud, Ciudad De Mexico 09340, Mexico
Univ Nacl Autonomade Mexico, Lab Zonas Aridas, Fac Estudios Super Zaragoza, Ciudad De Mexico 09230, Mexico
Senes-Guerrero, Carolina:
Tecnol Monterrey, Escuela Ingn & Ciencias, Av Gen Ramon Corona 2514, Zapopan 45138, Jalisco, Mexico
Tecnol Monterrey, Escuela Ingn & Ciencias, Ctr Biotecnol FEMSA, Av Eugenio Garza Sada 2501, Monterrey 64849, Nuevo Leon, Mexico
Varela, Lucia:
Univ Autonoma Metropolitana Iztapalapa, Dept Biol, Div Ciencias Biol & Salud, Ciudad De Mexico 09340, Mexico
Manuel Montano, Noe:
Univ Autonoma Metropolitana Iztapalapa, Dept Biol, Div Ciencias Biol & Salud, Ciudad De Mexico 09340, Mexico
Garcia-Sanchez, Rosalva:
Univ Nacl Autonomade Mexico, Lab Zonas Aridas, Fac Estudios Super Zaragoza, Ciudad De Mexico 09230, Mexico
Pacheco, Adriana:
Tecnol Monterrey, Escuela Ingn & Ciencias, Ctr Biotecnol FEMSA, Av Eugenio Garza Sada 2501, Monterrey 64849, Nuevo Leon, Mexico
Montano-Arias, Susana A.:
Univ Autonoma Metropolitana Iztapalapa, Dept Biol, Div Ciencias Biol & Salud, Ciudad De Mexico 09340, Mexico
Colegio Posgrad, Inst Recursos Nat, Programa Bot, Campus Montecillo, Texcoco 56230, Estado De Mexic, Mexico
Lucia Camargo-Ricalde, Sara:
Univ Autonoma Metropolitana Iztapalapa, Dept Biol, Div Ciencias Biol & Salud, Ciudad De Mexico 09340, Mexico
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