Effects of long-term cadmium exposure on growth and metabolomic profile of tomato plants.
Summary of "Effects of long-term cadmium exposure on growth and metabolomic profile of tomato plants."
The response of tomato plants to long-term cadmium exposure was evaluated after a 90-days long culture in hydroponic conditions (0, 20, and 100μM CdCl(2)). Cadmium preferentially accumulated in roots, and to a lower extent in upper parts of plants. Absolute quantification of 28 metabolites was obtained through (1)H NMR, HPLC-PDA, and colorimetric methods. The principal component analysis showed a clear separation between control and Cd treated samples. Proline and total ascorbate amounts were reduced in Cd-treated leaves, whereas α-tocopherol, asparagine, and tyrosine accumulation increased, principally in 100μM Cd treated leaves. Carotenoid and chlorophyll contents decreased only in 100μM Cd-mature-leaves, which correlate with a reduced expression of genes essential for isoprenoid and carotenoid accumulations. Our results show that tomato plants acclimatize during long-term exposure to 20μM Cd. On the contrary, 100μM Cd treatment results in drastic physiological and metabolic perturbations leading to plant growth limitation and fruit set abortion.
UR Biologie et Physiologie Cellulaires Végétales, Département de Biologie, Faculté des Sciences de Tunis, El Manar, 1060 Tunis, Tunisia; UMR 619 Biologie du Fruit, Centre INRA de Bordeaux, Université de Bordeaux IBVM, BP 81, Villenave d'Ornon, F-3314
This article was published in the following journal.
Name: Ecotoxicology and environmental safety
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/20846723
- DOI: http://dx.doi.org/10.1016/j.ecoenv.2010.08.014
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Medical and Biotech [MESH] Definitions
A plasticizer used in most plastics and found in water, air, soil, plants and animals. It may have some adverse effects with long-term exposure.
Experiments designed to determine the potential toxic effects of a long-term exposure to a chemical or chemicals.
Poisoning occurring after exposure to cadmium compounds or fumes. It may cause gastrointestinal syndromes, anemia, or pneumonitis.
Unstable isotopes of cadmium that decay or disintegrate emitting radiation. Cd atoms with atomic weights 103-105, 107, 109, 115, and 117-119 are radioactive cadmium isotopes.
Standards for limiting worker exposure to airborne contaminants. They are the maximum concentration in air at which it is believed that a particular substance will not produce adverse health effects with repeated daily exposure. It can be a time-weighted average (TLV-TWA), a short-term value (TLV-STEL), or an instantaneous value (TLV-Ceiling). They are expressed either as parts per million (ppm) or milligram per cubic meter (mg/m3).