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ARTÍCULO
TITULO

Cariopsis disinfection and plant regeneration of Spartina argentinensis.. Cien. Inv. Agr. (In English) 34(3): 187-192.

Mirian S. Bueno    
Susana R. Feldman    
Juan P. Ortiz    

Resumen

A protocol for disinfection and in vitro regeneration of Spartina argentinensis was developed. The lowest percentage of contamination was obtained after treating caryopses with 90° ethanol for 60 s and 20 min immersion in 2.5% sodium hypochlorite (NaOCl) plus 0.1% Tween 20. Murashige and Skoog (MS) media was used for callus induction, supplemented with 0.5 mg·L-1 of 2, 4 dichlorophenoxy acetic (2,4-D) and 1 mg·L-1 of indole-3-acetic acid (IAA). The highest proportion (20%) of shoot regeneration was achieved with MS media plus 0.25 mg·L-1 of bencyl aminopurine (BAP), whereas 0.5 mg·L-1 naphtalenacetic acid (NAA) was used for root induction. Plants were regenerated via organogenesis. To our knowledge, this is the first report of a protocol for in vitro plant regeneration of S. argentinensis, and it is the initial stage required for obtaining somaclonal variations. Se desarrolló un protocolo de desinfección y regeneración in vitro deSpartina argentinensis. El menor porcentaje de contaminación se obtuvo tratando los cariopses por 60 s en etanol 90° y 20 min de inmersión en hipoclorito de sodio al 2,5% con Tween 20. La inducción de callos se realizó en medio Murashige y Skoog (MS) suplementado con 0,5 mg·L-1 de ácido diclorofenoxi acético (2,4-D) y 1 mg·L-1 de ácido indol acético (AIA). La mayor (20%) regeneración de vástagos se logró con igual base salina y 0,25 mg·L-1 de bencilamino purina (BAP). Se utilizó 0,025 mg·L-1 de ácido naftalen acético para la regeneración de raíces. Las plantas se regeneraron vía organogénesis. Este protocolo es la primera mención de regeneración de plantas de S. argentinensis utilizando cultivo in vitro y constituye la etapa inicial para obtener variantes somaclonales. La metodología de desinfección se puede hacer extensiva a otras especies.

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