Coordinated role of soluble and cell wall bound phenols is a key feature of the metabolic adjustment in a mining woody fleabane (Dittrichia viscosa L.) population under semi-arid conditions
| Autor: | María A. Ferrer, M. C. Bueso, Antonio A. Calderón, Isabel Párraga-Aguado, Antonio López-Orenes |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Environmental Engineering Population Phenylalanine ammonia-lyase 010501 environmental sciences Biology 01 natural sciences Acclimatization Mining Soil chemistry.chemical_compound Caffeic Acids Nutrient Phenols Cell Wall Metals Heavy Plant Cells Botany Soil Pollutants Environmental Chemistry education Waste Management and Disposal Peroxidase 0105 earth and related environmental sciences Rhizosphere education.field_of_study Edaphic Dittrichia viscosa biology.organism_classification Pollution Erigeron Plant Leaves Biodegradation Environmental chemistry Spain Salicylic acid 010606 plant biology & botany |
| Zdroj: | Science of The Total Environment. 618:1139-1151 |
| ISSN: | 0048-9697 |
| DOI: | 10.1016/j.scitotenv.2017.09.195 |
| Popis: | Environmental contamination by hazardous heavy metals/metalloids (metal(loid)s) is growing worldwide. To restrict the migration of toxic contaminants, the establishment of a self-sustainable plant cover is required. Plant growth in multi-polluted soils is a challenging issue not only by metal(loid) toxicities, but also by the co-occurrence of other stressors. Dittrichia viscosa is a pioneer Mediterranean species able to thrive in metal(loid)-enriched tailings in semi-arid areas. The aim of the present work was to examine the metabolic adjustments involved in the acclimation responses of this plant to conditions prevailing in mine-tailings during Mediterranean spring and summer. For this purpose, fully-expanded leaves, and rhizosphere soil of both mining and non-mining populations of D. viscosa grown spontaneously in south-eastern Spain were sampled in two consecutive years. Quantitative analysis of >50 biochemical, physiological and edaphic parameters were performed, including nutrient status, metal(loid) contents, leaf redox components, primary and secondary metabolites, salicylic acid levels, and soil physicochemical properties. Results showed that mining plants exhibited high foliar Zn/Pb co-accumulation capacity, without substantially affecting their photosynthetic metabolism or nutritional status even in the driest summer period. The comparison of the antioxidative/oxidative profile between mining and non-mining D. viscosa populations revealed no major seasonal changes in the content of primary antioxidants (ascorbate and GSH), or in the levels of ROS. Multivariate analysis showed that phenylalanine ammonia-lyase (PAL) and peroxidase (PRX) activities and soluble and cell wall-bound phenols were potential biomarkers for discriminating between both populations. During the dry season, a marked enhancement in the activity of both PAL and soluble PRX resulted in both a drop in the accumulation of soluble phenols and an increase of the strong metal chelator caffeic acid in the cell-wall fraction, supporting the view that the plasticity of phenylpropanoid metabolism provide an effective way to counteract the effects of stress combinations. |
| Databáze: | OpenAIRE |
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