1992.
The effect of mercury on some aquatic plants. Natural emissions of mercury form two-thirds of the input; manmade releases form about one-third. However, the mercury content of the leaves was independent of that in the soil. Mercury concentration in aboveground parts of plants appears to depend largely on foliar uptake of HgPlants can be exposed to mercurials either by direct administration as antifungal agents, mainly to crop plants through seed treatment or foliar spray, or by accident. The absorption of organic and inorganic mercury from soil by plants is low, and there is a barrier to mercury translocation from plant roots to tops. Complutense 22, Madrid E-28040, Spain. 2007 Apr 5;36(3):646-53. doi: 10.2134/jeq2006.0278. Subscription will auto renew annually.Over 10 million scientific documents at your fingertips J. Phytopathol. The mercury in the leaves accumulated from the air can be delivered to the soil when the leaves fall. The most important sources of contaminating agricultural soil have been the use of organic mercurials as a seed-coat dressing to prevent fungal diseases in seeds. The end points screened are seed germination, seedling growth, relative growth of roots and shoots, and, in some case, studies of leaf-area index, internode development, and other anatomical characters. Unable to load your collection due to an error Accidental exposures occur through soil, water, and air pollution. 2006 Oct;65(5):889-97. doi: 10.1016/j.chemosphere.2006.03.008. 1985. Soil fertilization with and without liming significantly increased total Hg uptake, largely due to plant growth stimulation. Effect of mercuric acetate on mobilization of nitrogen and phosphorus during seedling growth ofCentre of Advanced Study Department of Botany, University of Calcutta, 35 Ballygunge Circular Road, 700 019, Calcutta, IndiaYou can also search for this author in In order to elucidate the participation of plants in the biogeochemical cycling of mercury in natural environments, total mercury contents in leaves, stems and roots of tall goldenrod (Solidago altissima L.), Compositae, were determined. Organomercurials have been reported to be 200 times more potent than inorganic mercury. With the advent of the industrial revolution, heavy metal contamination has become an ever increasing concern. These observations suggested that the leaves of the plant can accumulate environmental mercury, but the mercury does not come from the soil via the root and stems.
Considerable amounts of mercury may be added to agricultural land with sludge, fertilizers, lime, and manures. Hg is easily modified into several oxidation states, and it can be spread in many ecosystems. 1990b. The aims of the work described here were to acquire a better knowledge of the transfer routes in the soil-plant-atmosphere system and to ascertain whether plant mercury uptake is reversible. Print 2007 May-Jun.Restrepo-Sánchez NE, Acevedo-Betancourth L, Henao-Murillo B, Peláez-Jaramillo C.J Environ Sci (China). The most noticeable and consistent effect is the induction of c-mitosis through disturbance of the spindle activity, resulting in the formation of polyploid and aneuploid cells and c-tumors. Patra, M., Sharma, A. Mercury toxicity in plants. Additional parameters include biochemical assays and genetical studies.
Due to the recurrence of Hg pollution and due to the lack of knowledge about the effects of this heavy metal in plants, the aim of the present text is to provid… Injuries to cereal seeds caused by organic mercurials has been characterized by abnormal germination and hypertrophy of the roots and coleoptile.Mercury affects both light and dark reactions of photosynthesis. Thus, it is of major importance to understand the extent of the toxicity in plants and animals and the consequences from the ingestion of contaminated food. Toxicité génétique du chlorure de methylmercure (CH—. At low concentrations mercury has a toxic effect on the degrading capabilities of microorganisms. Many aquaporins are mercury sensitive, and in AQP1 a mercury-sensitive cysteine residue (Cys-189) is present adjacent to a conserved Asn-Pro-Ala motif. Liming itself had no significant effect. Uptake of mercury has been found to be plant specific in bryophytes, lichens, wetland plants, woody plants, and crop plants. doi: 10.1371/journal.pone.0133130. 2016 Jul 5;50(13):6632-43. doi: 10.1021/acs.est.5b04113. Epub 2015 Mar 10.Environ Sci Technol. eCollection 2015. Action of selected heavy metal ions on the photosystem 2 activity of the cyanobacterium——. mj.sierra@ciemat.es The leaves at the lower part of the plant tended to have a higher concentration of mercury than the upper leaves. Epub 2008 Dec 5.J Environ Qual. tomy@sci.kagoshima-u.ac.jp Gene 179: 9–19.—. Epub 2006 May 2.Mar Pollut Bull. The period of recovery after removal of mercury is inversely related to the concentration and duration of exposure.Bacterial plasmids encode resistance systems for toxic metal ions, including HgImmediate online access to all issues from 2019.
Pollut. Name must be less than 100 characters Mercury concentration in aboveground parts of plants appears to depend largely on foliar uptake of Hg0 volatilized from the soil.
Rast. Atmospheric Emission and Plant Uptake of Mercury from Agricultural Soils near the Almadén Mercury Mine 1. Mercury poisoning has become a problem of current interest as a result of environmental pollution on a global scale. 2015 Jul 15;10(7):e0133130. Chemosphere. Plant cells contain aquaporins, proteins that facilitate the transport of water, in the vacuolar membrane (tonoplast) and the plasma membrane. Induced plant uptake and transport of mercury in the presence of sulphur‐containing ligands and humic acid. The roots also can adsorb the mercury from the soil; however, the mercury does not move from the roots and is not released into the air via the plant body.
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