Pollen Morphology of Argentinean species of Rebutia s. str. (Cactaceae, Cactoideae)

Authors

  • Silvina Garralla CECOAL (Centro de Ecología Aplicada al Litoral), UNNE (Universidad Nacional del Nordeste), Casilla de correo 291, 3400 Corrientes.
  • Nora B. Muruaga Fundación Miguel Lillo, Laboratorio de Taxonomía Vegetal Fanerogámica, Miguel Lillo 251, 4000 Tucumán.
  • Graciela Cuadrado CECOAL (Centro de Ecología Aplicada al Litoral), UNNE (Universidad Nacional del Nordeste), Casilla de correo 291, 3400 Corrientes.

DOI:

https://doi.org/10.14522/darwiniana.2014.462.73

Keywords:

Argentina, Cactaceae, Cactoideae, Pollen, Rebutia

Abstract

This work analyzes pollen characteristics of Rebutia deminuta, R. fabrisii var. fabrisii, R. fabrisii var. aureiflora, R. fiebrigii, R. marsoneri, R. minuscula subsp. minuscula, R. minuscula subsp. wessneriana and  R. padcayensis to provide data that allow species delimitation. Pollen samples were collected in different mountain localities of northwestern Argentina. Observations, counts and measures of pollen grains were carried out under optical (MO) and scanning electron microscopy (MEB). Results show that Rebutia is a stenopalynous genus; pollen grains are apolar or isopolar, radiosymmetric, medium-sized (32-55 µm), circular to subcircular; tricolpate or pantocolpate; with textate, perforate and nanoechinate exine. Differences among taxa are discussed, and a palinological key is presented.

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Published

31-12-2008

How to Cite

Garralla, S., Muruaga, N. B., & Cuadrado, G. (2008). Pollen Morphology of Argentinean species of Rebutia s. str. (Cactaceae, Cactoideae). Darwiniana, Nueva Serie, 46(2), 270–278. https://doi.org/10.14522/darwiniana.2014.462.73

Issue

Vol. 46 No. 2 (2008)

Section

Structure and Development

License

Licencia de Creative Commons
Starting on 2012, Darwiniana Nueva Serie uses Licencia Creative Commons Atribución-NoComercial 2.5 Argentina .