Ultrastructure and histology of organogenesis induced from shoot tips of maize (Zea mays, Poaceae)

 

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Opis bibliograficzny
Autorzy: Marín Méndez, Walter, Sánchez Chacón, Ethel, Gatica Arias, Andrés Mauricio, Ramírez Fonseca, Pilar, Freer Bustamante, Enrique, Valdez Melara, Marta
Format: artículo original
Data wydania:2009
Opis:Shoot tips of maize (Zea mays L.) were cultured on Murashige and Skoog medium supplemented with 2 mg/l BA +1 mg/l 2,4-D +40 mg/l, to investigate phases of ontogenetic development. The study used light microscopy as well as scanning and transmission electronic microscopy techniques. Shoot tips of maize are composed of small cells with a dense cytoplasm and a prominent nucleus. The process of organogenesis began with swelling of the shoot tip, as the first evidence of organogenic calli formation observed three weeks after culture get started. There were two morphologically different types of cells within the organogenic calli. The layer consisted of large cells with small nucleus, free-organelle cytosol, irregular plasmatic membrane, trichomelike structures, and thick cell walls. In the inner cell layer, small and isodiametric cells with a prominent nucleus, small vacuoles, endoplasmatic reticulum, Golgi, mitochondrias and chloroplasts were observed. The presence of trichomes in the more active morphogenic zones could indicate an organogenic potential. Rev. Biol. Trop. 57 (Suppl. 1): 129-139. Epub 2009 November 30.
Kraj:Kérwá
Instytucja:Universidad de Costa Rica
Repositorio:Kérwá
OAI Identifier:oai:kerwa.ucr.ac.cr:10669/717
Dostęp online:http://revistas.ucr.ac.cr/index.php/rbt/article/view/21290
https://hdl.handle.net/10669/717
Słowo kluczowe:Zea mays
Costa Rica
CIEMIC
In vitro culture
Histology
Ultrastructure