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- Title
Phenolic Compounds as Stress Markers in Plants from Gypsum Habitats.
- Authors
Boscaiu, Monica; Sánchez, María; Bautista, Inmaculada; Donat, Pilar; Lidón, Antonio; Llinares, Josep; Llul, Cristina; Mayoral, Olga; Vicente, Oscar
- Abstract
Gypsum habitats represent a stressful environment for plants, combining aridity, limited nutrients and salt toxicity in the soil. Since different abiotic stress conditions cause oxidative stress by generation of 'reactive oxygen species' (ROS), the activation of antioxidant systems is considered as one of the general mechanisms of response to stress in plants. The levels of total phenolic compounds and total flavonoids, well-known antioxidants, were determined in several species from a gypsum area in Valencia, SE Spain, to study their possible role as biochemical markers of stress responses. Plant samples were collected from three selected experimental plots, located on a hill slope and showing different levels of environmental stress, regarding dryness and gypsum content in the soil. Samplings were repeated three times along the year 2009, in spring, summer and autumn. The measured levels of total phenolics and flavonoids were very variable among taxa, precluding a direct comparison of different species, but in general most of them showed higher contents of these compounds in summer, which is the most stressful period in the Mediterranean climate, with higher temperatures and practically no rainfall. The patterns of phenolics and flavonoids accumulation in plants, according to spatial gradients in the experimental area, also suggested a correlation with water stress, but not so much with the toxicity of the substrate.
- Subjects
PHENOLS; PLANTS; FLAVONOIDS; PLANT pigments; GYPSUM; SOILS
- Publication
Bulletin of the University of Agricultural Sciences & Veterinary Medicine Cluj-Napoca. Horticulture, 2010, Vol 67, Issue 1, p44
- ISSN
1843-5254
- Publication type
Article