Effect of chromium species on phytochemical and physiological parameters in Datura innoxia

Autor: Adnane Hitmi, Cécile Gauthier-Moussard, Olivier Faure, Liliane Jean, Philippe Vernay, François Bordas, Gérard Ledoigt
Přispěvatelé: Groupement de Recherche Eau, Sol, Environnement (GRESE), Université de Limoges (UNILIM), Physiologie et génétique végétales (ERTAC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)
Jazyk: angličtina
Rok vydání: 2008
Předmět:
0106 biological sciences
Stomatal conductance
Chromatography
Gas
Environmental Engineering
Proline
Photosystem II
Health
Toxicology and Mutagenesis
chemistry.chemical_element
010501 environmental sciences
[CHIM.INOR]Chemical Sciences/Inorganic chemistry
Photochemistry
Photosynthesis
01 natural sciences
Electron Transport
Chromium
Alkaloids
[CHIM.ANAL]Chemical Sciences/Analytical chemistry
Chromium Compounds
medicine
Environmental Chemistry
[SDV.BV]Life Sciences [q-bio]/Vegetal Biology
Nutritional Physiological Phenomena
Hyoscyamine
0105 earth and related environmental sciences
biology
Public Health
Environmental and Occupational Health
food and beverages
Plant Transpiration
General Medicine
General Chemistry
biology.organism_classification
Pollution
Photosynthetic capacity
Kinetics
Datura
chemistry
[SDE]Environmental Sciences
010606 plant biology & botany
Nuclear chemistry
medicine.drug
Zdroj: Chemosphere
Chemosphere, Elsevier, 2008, 72 (5), pp.763-71. ⟨10.1016/j.chemosphere.2008.03.018⟩
ISSN: 0045-6535
DOI: 10.1016/j.chemosphere.2008.03.018⟩
Popis: International audience; In soil, chromium can be found in two main valence states: hexavalent Cr(VI) and trivalent Cr(III). In this study, we investigated the impact of Cr on photosynthetic gas exchange, photosystem II (PSII) activity, Cr translocation and accumulation, proline content and alkaloids production, i.e. scopolamine and hyoscyamine, in Datura innoxia. Cr uptake was influenced by its oxidation state and its concentration in growth medium. The plant roots were determined as being the main organ of Cr accumulation. Cr(VI) was more toxic than Cr(III) as indicated by reduction in plant biomass and net photosynthesis. The stomatal conductance showed a similar trend to that of photosynthetic capacity. Cr(III) and Cr(VI) had a different impact on substomatal CO(2) concentration then Cr toxicity was related to its oxidation states. In plants stressed with a Cr(VI) excess, a down regulation of PSII activity was observed with an impairment of photochemical activity. Indeed, the maximum quantum yield of PSII (F(v)/F(m)), the quantum yield of PSII (PhiPSII) and the efficiency of excitation capture by open centers (F'(v)/F'(m)) decreased. Cr(III) had little effects on PSII primary photochemistry, whatever its form induces an increase of scopolamine content without changes in hyoscyamine content in leaves of D. innoxia. These results provide that chromium contamination can change the secondary metabolites composition of leaves, thereby, impacting the quality, safety and efficacy of natural plant products synthesized by D. innoxia plants.
Databáze: OpenAIRE
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