Pollen ontogenesis in Oenothera: a comparison of genotypically normal anthers with the male-sterile mutant sterilis

Noher de Halac, Inés ORCID: https://orcid.org/0000-0003-2930-9282, Cismondi, Inés Adriana ORCID: https://orcid.org/0000-0001-6037-9794 and Harte, Cornelia (1990) Pollen ontogenesis in Oenothera: a comparison of genotypically normal anthers with the male-sterile mutant sterilis. Sexual Plant Reproduction, 3 (1). pp. 41-53. ISSN 1432-2145

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Resumen

A 12-stage “normal table” of anther development in Oenothera, is presented. The stages are characterized by developmental steps in the reproductive cells and the tapetum, including waves of amylogenesis and lipogenesis as well as the production of the sporoderm layers. This is compared to a corresponding table for the male-sterile (mst) mutant sterilis (ster). Differences between the development of fertile and mst anthers appear after the liberation of the microspores from the tetrads. Male sterility results from a malfunction of the tapetum in the production of ektexine sporopollenin precursors, which aggregate in the tapetal cells. The consequence is the absence of ektexine from the microspores. The endexine is then dissolved, presumably by an enzyme. This process leads to naked microspores whose unprotected cytoplasms are attacked by hydrolytic enzymes present in the thecal fluid. At anthesis the anthers contain only undefined remnants of microspores and tapetum.

Tipo de documento:	Artículo
DOI:	https://doi.org/10.1007/BF00189951
Palabras clave:	Male sterility. Microspores. Oenothera. Ontogeny. Pollen. Tapetum.
Temas:	S Agricultura > SB Cultura de la planta
Unidad académica:	Universidad Católica de Córdoba > Facultad de Ciencias de la Salud
Google Académico:	Ver citaciones
URI:	http://pa.bibdigital.ucc.edu.ar/id/eprint/3705

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