Comparative study of pollen morphology and exine ultrastructure in tetrads, octads and polyads of the genus Mimosa (Leguminosae)
Por:
Medina-Acosta, Montserrath, Grether, Rosaura, Martinez-Bernal, Angelica, Ramirez-Arriaga, Elia
Publicada:
1 ene 2019
Categoría:
Paleontology
Resumen:
This is the first study of exine ultrastructure to be performed in five endemic Mexican Mimosa taxa (M. pringlei var. pringlei, M. calcicola, M. spirocarpa, M. caerulea and M. sousae), one occurring in Mexico and Central America (M. occidentalis), one widely distributed throughout the neotropics (M. setosa var. paludosa), and two in South America (M. irrigua and M. daleoides). Mimosa pollen grains are associated in polyads (12 grains), octads and tetrads. Polyads and octads in members of the basal clade of Mimosa phylogeny (sect. Mimadenia) evince the affinity of Mimosa with Piptadenia. Octads are retained in sect. Batocaulon and tetrads are evolved in this section. More recent clades (sect. Habbasia, Mimosa and Calothamnos) only show tetrads varying in size and shape. Polyads show greater variation in the exine layers, with a bistratified granular structure. Octads display a columellar-granular infratectal structure while tetrads in sect. Mimosa exhibit a less variable exine with a granular infratectal structure. © 2018, © 2018 AASP – The Palynological Society.
Filiaciones:
Medina-Acosta, Montserrath:
Laboratorio de Biosistemática de Leguminosas, Departamento de Biología, División de C.B.S., Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco 186, Col. Vicentina, Del. Iztapalapa, C.P., Ciudad de México, 09340, Mexico
Univ Autonoma Metropolitana Iztapalapa, Dept Biol, Div CBS, Lab Biosistemat Leguminosas, Av San Rafael Atlixco 186, Mexico City 09340, DF, Mexico
Grether, Rosaura:
Laboratorio de Biosistemática de Leguminosas, Departamento de Biología, División de C.B.S., Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco 186, Col. Vicentina, Del. Iztapalapa, C.P., Ciudad de México, 09340, Mexico
Univ Autonoma Metropolitana Iztapalapa, Dept Biol, Div CBS, Lab Biosistemat Leguminosas, Av San Rafael Atlixco 186, Mexico City 09340, DF, Mexico
Martinez-Bernal, Angelica:
Laboratorio de Biosistemática de Leguminosas, Departamento de Biología, División de C.B.S., Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco 186, Col. Vicentina, Del. Iztapalapa, C.P., Ciudad de México, 09340, Mexico
Univ Autonoma Metropolitana Iztapalapa, Dept Biol, Div CBS, Lab Biosistemat Leguminosas, Av San Rafael Atlixco 186, Mexico City 09340, DF, Mexico
Ramirez-Arriaga, Elia:
Laboratorio de Palinología: Paleopalinología y Actuopalinología, Instituto de Geología, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica s/n, Ciudad Universitaria, Del. Coyoacán, C.P., Ciudad de México, 04510, Mexico
Univ Nacl Autonoma Mexico, Inst Geol, Lab Palinol Paleopalinol & Actuopalinol, Circuito Invest Cient S-N,Ciudad Univ, Mexico City 04510, DF, Mexico
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