Changes in the phenylalanine ammonia lyase activity, total phenolic compounds, and flavonoids in Prosopis glandulosa treated with cadmium and copper
Título del documento: Changes in the phenylalanine ammonia lyase activity, total phenolic compounds, and flavonoids in Prosopis glandulosa treated with cadmium and copper
Revista: Anais da Academia Brasileira de Ciencias
Base de datos: PERIÓDICA
Número de sistema: 000420169
ISSN: 0001-3765
Autores: 1
2
2
1
1
1
3
Instituciones: 1Universidad Autónoma de Baja California, Instituto de Ciencias Agrícolas, Ejido Nuevo León, Baja California. México
2Centro de Investigación en Alimentación y Desarrollo A.C., Dirección de Tecnología de Alimentos de Origen Vegetal, Hermosillo, Sonora. México
3Tecnológico Nacional de México, Campus Tuxtla Gutiérrez, Tuxtla Gutiérrez, Chiapas. México
Año:
Periodo: Jun
Volumen: 90
Número: 2
Paginación: 1465-1472
País: Brasil
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Analítico
Resumen en inglés The aim of the present work is to evaluate the changes on the phenylalanine ammonia lyase (PAL) activity, phenolic compounds accumulation and photochemical efficiency in leaves of P. glandulosa treated with Cd2+ (0.001 M) and Cu2+ (0.52 M) concentrations for 96 hunder hydroponic conditions. The results showed that only leaves treated with copper had a decrease in photochemical efficiency and leaf epidermal polyphenols in P. glandulosa leaves after 96 h of exposure. On the other hand the reverse-phase HPLC analysis revealed higher levels of phenolic compound (gallic, vanillic and caffeic acids) and flavonoids (rutin and kaempferol-3-O-glucosides) in plant leaves from Cu and Cd-treatments with respect to control plants. Finally, highest increments in PAL activity was observed in extracts of leaves treated with Cu and Cd (about 205 and 284%), respectively, with respect to control plants after 96 h treatment. These suggest that activation of phenylpropanoid pathway represent a source of nonenzymatic antioxidants that protect at P. glandulosa against oxidative stress when exposed to cadmium and copper. Hence future studies are necessary to elucidate the participation of phenylpropanoid pathway in the reduction of metal toxicity in Prosopis species
Disciplinas: Química,
Biología
Palabras clave: Química analítica,
Bioquímica,
Botánica,
Metales pesados,
Prosopis glandulosa,
Flavonoides,
Clorofila a,
Fluorescencia
Keyword: Analytical chemistry,
Biochemistry,
Botany,
Heavy metals,
Prosopis glandulosa,
Flavonoids,
Chlorophyll a,
Fluorescence
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