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1.
Indian J Biochem Biophys ; 2014 Feb; 51(1): 75-80
Article in English | IMSEAR | ID: sea-154239

ABSTRACT

Drought-tolerant cultivars and their phytochemical composition, which has a role in providing drought tolerance are gaining importance. In this study, rice bran oil and semi-purified oryzanol (SPO) obtained from five rice (Oryza sativa L.) cultivars, namely P1401 and PB1 (drought-susceptible) and N22, PNR381 and APO (drought-tolerant) were analyzed for the γ-oryzanol content, an antioxidant present in considerable amount in the rice bran. The higher level of γ-oryzanol and its antioxidant activity was observed in drought-tolerant cultivars (N22, PNR381 and APO) as compared to drought-susceptible (PB1 and P1401), suggesting the role of γ-oryzanol in drought tolerance, as antioxidants are known to play an important role by scavenging free radicals. The total antioxidant activity of γ-oryzanol might be attributed to 24-methylene cycloartanyl ferulate, a major component of γ-oryzanol. By enhancing the level of active oryzanol components identified in this study by genetic and molecular means could impart increased drought tolerance.


Subject(s)
Antioxidants/metabolism , Droughts , Oryza/cytology , Oryza/metabolism , Oryza/physiology , Phenylpropionates/isolation & purification , Phenylpropionates/metabolism , Plant Oils/metabolism
2.
Arch. latinoam. nutr ; 48(1): 7-12, mar. 1998. ilus, tab, graf
Article in Spanish | LILACS | ID: lil-217530

ABSTRACT

El gamma-Oryzanol, una mezcla de ésteres del ácido ferúlico de esterol y alcohol triterpénico, está presente en el aceite de salvado de arroz en niveles que varían entre 1-2 g/100g, donde actúa como antioxidante natural. Recientes investigaciones han demostrado que el gamma-Oryzanol causa una disminución en el nivel de colesterol en las arterias, reduciendo el riesgo de enfermedades cardiovasculares, además, también ha sido usado en Japón como antioxidante natural en alimentos, bebidas y cosméticos. Esta revisión aborda los aspectos referentes al gamma-Oryzanol, como sus propiedades físico-químicas, su presencia en el aceite de salvado de arroz, su actividad antioxidante e hipocolesterolémica, asé como los métodos de extracción, identificación y cuantificación.


Subject(s)
Anticholesteremic Agents/pharmacology , Antioxidants/pharmacology , Oryza/chemistry , Phenylpropionates/pharmacology , Plant Oils/chemistry , Food Handling , Phenylpropionates/chemistry , Phenylpropionates/isolation & purification , Plant Oils/pharmacology , Solubility
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