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Phylogenetic and morphological analyses of Pilosocereus leucocephalus group s.s. (Cactaceae) reveal new taxonomical implications.
Franco-Estrada, Daniel; Barrios, Duniel; Cervantes, Cristian R; Granados-Aguilar, Xochitl; Arias, Salvador.
Afiliação
  • Franco-Estrada D; Posgrado en Ciencias Biológicas, Instituto de Biología, Universidad Nacional Autónoma de México, Ciudad Universitaria, Coyoacán, 04510, Mexico City, Mexico. daniel.franco@st.ib.unam.mx.
  • Barrios D; Jardín Botánico, Instituto de Biología, Universidad Nacional Autónoma de México, Tercer Circuito Exterior, Ciudad Universitaria, Coyoacán, 04510, Mexico City, Mexico. daniel.franco@st.ib.unam.mx.
  • Cervantes CR; Grupo de Ecología y Conservación, Jardín Botánico Nacional, Universidad de La Habana, Carretera El Rocío km 3½, Calabazar, Boyeros, 19 230, Havana, Cuba.
  • Granados-Aguilar X; Posgrado en Ciencias Biológicas, Instituto de Biología, Universidad Nacional Autónoma de México, Ciudad Universitaria, Coyoacán, 04510, Mexico City, Mexico.
  • Arias S; Jardín Botánico, Instituto de Biología, Universidad Nacional Autónoma de México, Tercer Circuito Exterior, Ciudad Universitaria, Coyoacán, 04510, Mexico City, Mexico.
J Plant Res ; 135(3): 423-442, 2022 May.
Article em En | MEDLINE | ID: mdl-35305187
Pilosocereus is one of the Cactaceae family's most relevant genera in terms of the number of species and its wide geographical range in the Americas. Within Pilosocereus, five informal taxonomic groups have been recognized, one of which is P. leucocephalus group s.s., whose phylogenetic relationships remain unresolved. Therefore, our objectives are to recognize the circumscriptions of the species in P. leucocephalus group s.s. and to corroborate the monophyly and phylogenetic relationships of this group through a set of morphological and molecular characters. This study is based on representative sampling along the broad distribution of this group in Mexico and Central America using multivariate and phylogenetic analyses. The morphological characters identified to contribute to species recognition and group formation are branch diameter, areole length, the areole length-width ratio, the distance between areoles, the length of the longest radial spine, and branch and spines colors. The chloroplast markers rpl16, trnL-trnF, and petL-psbE and the nuclear marker AT1G18270 support the monophyly of the P. leucocephalus group s.s., and two probable synapomorphies are suggested, including one transversion in rpl16 and another in petL-psbE. Together, our results demonstrate that sampled species of P. leucocephalus group s.s. encompass six species distributed in Mexico and Central America: P. alensis and P. purpusii in the western region, P. chrysacanthus and P. collinsii in the central region, and P. gaumeri and P. leucocephalus in the eastern region. A taxonomic key to recognized species is provided.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Cactaceae Tipo de estudo: Prognostic_studies País/Região como assunto: Mexico Idioma: En Revista: J Plant Res Assunto da revista: BOTANICA Ano de publicação: 2022 Tipo de documento: Article País de afiliação: México País de publicação: Japão
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Cactaceae Tipo de estudo: Prognostic_studies País/Região como assunto: Mexico Idioma: En Revista: J Plant Res Assunto da revista: BOTANICA Ano de publicação: 2022 Tipo de documento: Article País de afiliação: México País de publicação: Japão