INDICADORES BIOQUÍMICOS PARA LA SELECCIÓN TEMPRANA DE GENOTIPOS DE ARROZ (Oryza sativa L.) CON TOLERANCIA A LA SALINIDAD Biochemical indicators for the early selection of genotypes of rice (Oryza sativa L.) to salt tolerance Alexis Lamz Piedra , María C. González Cepero y Yanelis Reyes Guerrero

The present study aimed to perform biochemical studies to search possible indicators for differentiation in the early development stages of rice varieties, in relation to their degree of tolerance to saline stress. Leaf samples of two varieties with different degrees of tolerance to salinity (Pokkali and Amistad-82) and grew up in greenhouses growing in nutrient solutions simulating the salt stress (8 and 12 dS.m -1 ), were analyzed. At 35 days after planting, it was assessed the activity of the enzyme peroxidase, total protein content, proline and lipid peroxidation. The results showed a differential behavior of the varieties in their degree of tolerance when using the EC 12 dS.m -1 which allows using the activity of the