Diferenciación molecular de Lemna aequinoctialis y l. Valdiviana (lemnaceae) por patrones proteicos
Fecha
2008
Autores
Montero Rojas, Mª del Milagro
Salas Zúñiga, Elizabeth
Acuña López, Freddy
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Editor
Universidad Nacional (Costa Rica)
Resumen
El estudio se llevó a cabo en el Laboratorio de Genética Molecular de la Universidad Nacional, Heredia, Costa Rica. Se utilizaron plantas acuáticas macrófitas de Lemna valdiviana y L. aequinoctialis previamente identificadas. Estas especies habitan en aguas ricas en sales disueltas y aguas servidas. Recientemente se les consideró como un indicador de la contaminación ocasionada por pesticidas y herbicidas en el agua. La composición proteica llega a niveles entre 38 y 43% de materia seca, importante para diversos usos. La extracción de proteínas totales, por medio de electroforesis discontinua en gel de poliacrilamida, se realizó en condiciones reductoras con SDS (SDS-PAGE). Los geles separadores empleados fueron al 8 y 10%, gel espaciador al 4% y la tinción se efectuó con azul commassie. Los diversos patrones proteicos reflejaron diferencias genéticas entre ambas especies que se pueden deber a las diferencias de hábitat y de reproducción.
This study was done at the Molecular Genetics Laboratory of Universidad Nacional, Heredia, Costa Rica. Previously identified macrophyte aquatic plants Lemna valdiviana and L. aequinoctialis were used. Usually these species are found in residual water or salt rich water. Recently these species have been considered as indicators of contamination caused by pesticides and herbicides present in the water. Their protein composition achieves levels as high as 38-43% of dry matter, which is important for different practical purposes. Total protein extraction was carried out in reducing conditions, using discontinuous polyacrylamide gel electrophoresis with SDS (SDS-PAGE). Stacking gels were 8 and 10%, resolving gel was 4% and running time was 3-4 hours. Gels were dyed with Coomasie blue. Protein patterns showed genetic differences between both species which might be due to differences in the habitat and in their reproduction type.
This study was done at the Molecular Genetics Laboratory of Universidad Nacional, Heredia, Costa Rica. Previously identified macrophyte aquatic plants Lemna valdiviana and L. aequinoctialis were used. Usually these species are found in residual water or salt rich water. Recently these species have been considered as indicators of contamination caused by pesticides and herbicides present in the water. Their protein composition achieves levels as high as 38-43% of dry matter, which is important for different practical purposes. Total protein extraction was carried out in reducing conditions, using discontinuous polyacrylamide gel electrophoresis with SDS (SDS-PAGE). Stacking gels were 8 and 10%, resolving gel was 4% and running time was 3-4 hours. Gels were dyed with Coomasie blue. Protein patterns showed genetic differences between both species which might be due to differences in the habitat and in their reproduction type.
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Palabras clave
LEMNA VALDIVIANA, L. AEQUINOCTIALIS, PROTEÍNAS TOTALES, ELECTROFORESIS, TOTAL PROTEIN, ELECTROPHORESIS