Diferencias Cromosomicas Entre Algunas Especies de Los Generos Sophora L. Y Styphnolobium Schott

Palomino, Guadalupe; Martínez, Patricia; Bernal, C Amanda; Sousa, S Mario

doi:10.2307/2399828

Cited by 19 publications

(14 citation statements)

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“…The genus Sophora s.s. is distributed today in tropical and temperate regions of both hemispheres (Palomino et al 1993) and is well represented in Mexico (Sousa and Delgado 1993). The occurrence of Sophora sousae within the present area of distribution of the genus and the distribution of the closely related genus ~ty~hnolobium, with most of its species endemic to restricted regions of Mexico (e.g., Styphnolobium burseroides Sousa, Rudd et Medrano, restricted to the southern part of the Desert of TehuacBn, very near the fossil locality; Sousa and Rudd 1993), support the suggestion that tropical America is one of the main centers of diversification of the Sophoreae (Crepet and Herendeen 1992).…”

Section: Discussionmentioning

confidence: 99%

“…COMPARISON: Sophora sousae is similar to Sophora L. s.s. but not to Styphnolobium Schott, which has recently been revised and confirmed as a segregate from Sophora based on karyotype, chromosome number, pollen, and fruit characters (Sousa and Rudd 1993;Palomino et al 1993). Identification of the fossil fruit with Sophora is based on the presence in this genus of strongly moniliform, dry fruits with smooth, somewhat rigid walls (Fig.…”

Section: Systematic Descriptionsmentioning

confidence: 99%

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Fossil legume fruits from tertiary strata of Puebla, Mexico

Magallón

Cevallos-Ferriz²

1994

Can. J. Bot.

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A small assemblage of fossil legume fruits, leaf fragments, and leaflets has been recovered from the Tertiary (Oligocene) "Los Ahuehuetes" flora near the town of Tepexi de Rodríguez, Puebla, in south-central Mexico. Five legume fruits are described and compared with fruits of extant genera. Four fruit types were identified as belonging to the modern genera Prosopis (Mimoseae; Mimosoideae), Mimosa (Mimoseae; Mimosoideae), Lysiloma (Ingeae; Mimosoideae), and Sophora (Sophoreae; Papilionoideae). Another fruit exhibits a combination of characters unknown among extant legumes, and although superficially similar to some species of Papilionoideae, it represents an extinct genus. The four identified genera are diverse in the extant vegetation of Mexico; in fact, Mexico represents an important area of distribution for them. The presence of Prosopis, Mimosa, Lysiloma, and Sophora in the fossil flora of Puebla documents the occurrence of these genera in this part of their present area of distribution by the Oligocene. The climatic affinities of modern species of Mimosa, Lysiloma, and Sophora are so varied as to preclude any useful paleoclimatic inference. Prosopis is regularly associated with arid environments; however, the genus has been reported from fossil localities where humid conditions prevailed. This observation, together with the assemblage of plants that co-occur in the Los Ahuehuetes flora, suggests that plant communities of the past may have been composed, at least partly, of elements that today are associated with different habitats and environmental conditions. The fossil legume fruits from Los Ahuehuetes flora add to the previously known diversity of Leguminosae by the Tertiary, confirm tropical America as one of the important areas of radiation and diversification for Leguminosae, and contribute to the knowledge of Tertiary floras of southern North America. Key words: Leguminosae, Tertiary, Mexico, paleobotany, fossil legume.

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Section: Discussionmentioning

confidence: 99%

Section: Systematic Descriptionsmentioning

confidence: 99%

Fossil legume fruits from tertiary strata of Puebla, Mexico

Magallón

Cevallos-Ferriz²

1994

Can. J. Bot.

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“…Differences were found in the karyotype formula and in the presence of secondary constrictions among these examined species; karyotypic features seem to be taxonomically useful for Sophora. For instance, Sousa S. and Rudd (1993) recently recognized the genus Styphnolobium Schott as separate from Sophora based on the existence of postulated basic numbers (x 14 for the former and x 9 for the latter [Palomino et al 1993]), as well as some other morphological features (Sousa S. and Rudd 1993).…”

Section: Discussionmentioning

confidence: 99%

The Somatic Chromosomes of Sophora fernandeziana (Fabaceae), an Endemic Tree from Robinson Crusoe Island

Stiefkens¹,

Bernardello²,

Anderson³

2001

Pacific Science

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“…Through the genome analysis of various species of Sophora (Leguminosae) and the integration of this Genome analysis of Mexican flora Guadalupe Palomino Laboratorio de Citogenética,Jardín Botánico,Instituto de Biología,Universidad Nacional Autónoma de México,Apartado Postal 70614,México,D.F. 04510, data with morphological, palynological, and biochemical studies, these species were taxonomically relocated to the genus Sophora and Styphnolobium (Palomino et al, 1993). By studing the genome of Chenopodium (Chenopodiaceae) species, along with morphological, anatomical and chemical analyses, we relocated some of the species of this genus to the genus Teloxys (Palomino et al, 1990).…”

Section: Cytogenetic Studies In Mexican Plants: Case Studymentioning

confidence: 99%