Influence of mercury on chlorophyll content in winter wheat and mercury bioaccumulation

Liu, D.; Wang, X.; Chen, Z.; Wang, Y.

doi:10.17221/210/2009-pse

Cited by 32 publications

(20 citation statements)

References 29 publications

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“…In the present study, the root and shoot length, plant fresh weight, amount of total chlorophyll, soluble protein, Ca and Mg content were induced marginally at low concentration of Hg (2.5 μM) and declined slightly at moderate concentration of Hg (5 μM). The induction of chlorophyll at low concentration of Hg in wheat plants is already reported (Liu et al 2010). The stimulating effects of low concentrations of heavy metal on several plant growth parameters is normally related to the hormetic effect, which probably represents an overcompensation response to a disruption in the homeostasis of the organism (Aina et al 2007).…”

Section: Discussionmentioning

confidence: 64%

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Mercury induced phytotoxicity and oxidative stress in wheat (Triticum aestivum L.) plants

Sahu

Upadhyay

Sahoo

2011

Physiol Mol Biol Plants

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The phytotoxicity and oxidative damage in response to different concentrations of Hg (0.0, 2.5, 5.0, 10 and 25 μM) were evaluated in wheat plants. The root and shoot growth, content of chlorophyll and total soluble protein declined at 10 and 25 μM Hg. Roots of the plant were more affected as compared to the shoot. The malondialdehyde (MDA) quantity enhanced in the roots of wheat plants treated with 10 and 25 μM Hg and in the leaves of plants treated with 25 μM Hg. The concentration of H 2 O 2 decreased at low concentration and increased at high concentration of Hg. The induction of enzymatic antioxidants (catalase, CAT; ascorbate peroxidase, APX; peroxidase, POX and superoxide dismutase, SOD) was found in the roots and leaves of plants with increased concentration of Hg up to 10 μM and low activities of these enzymes were observed at 25 μM Hg. Also, the level of K, Ca and Mg declined in leaf tissues of Hg treated plants. Thus wheat plants exposed to lower concentrations of Hg did not experience any oxidative stress. However, on treatment with 10 μM Hg, the roots and leaves responded differently. Both the leaves and roots of plants treated with higher concentration of Hg were subjected to comparatively greater oxidative damage and demonstrated that the antioxidative components were not able to remove the stress due to higher concentration of Hg and thus might affect the productivity in wheat plants.

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Section: Discussionmentioning

confidence: 64%

“…It is a highly toxic non-essential element and its dispersion in the environment is considered to be a serious environmental problem for its persistent character (Liu et al 2010). The uptake of Hg leading to impairment of various biochemical and physiological processes has been observed in a variety of plants.…”

Section: Introductionmentioning

confidence: 99%

Mercury induced phytotoxicity and oxidative stress in wheat (Triticum aestivum L.) plants

Sahu

Upadhyay

Sahoo

2011

Physiol Mol Biol Plants

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“…No differences were observed among nitrogen supplies for the grain growth periods. Leaf samples were harvested two weeks after W × N treatments were applied, and chlorophyll concentrations (chl) were measured using a spectrophotometer at two wavelengths (648.2 and 664.9 nm) for maximum absorptions of chlorophyll a and b, respectively (Liu et al 2010). 14 days after N × W treatments were applied (one week after anthesis), single plants were removed from each experimental unit at the end of the photoperiod.…”

Section: Methodsmentioning

confidence: 99%

The impact of post-anthesis nitrogen and water availability on yield formation of winter wheat

Madani¹,

Makarem²,

Vazin³

et al. 2012

PLANT SOIL ENVIRON

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The effects of irrigation regimes (full irrigation and water-withholding at anthesis) and post-anthesis nitrogen supplies (LN: 0, MN: 20 and HN: 40 kg N/ha) on grain yield and its components in winter wheat were studied, with attention to biomass gain by assimilation and its loss by respiration. Fully-irrigated wheat responded to N fertilization with increased grain number (GN) and decreased grain weight (GW) and achieved similar grain yields (5.2 to 5.5 t/ha) at different N supplies. However, drought-stressed wheat responded to N with higher GN without significant changes in GW, and achieved higher grain yields (2.7 vs. 3.3 t/ha) with HN compared to LN. Net assimilation rates during grain filling (NARg) increased with increasing post-anthesis N fertilization for drought-stressed wheat (NARg: 3.8 and 4.5 g/m/day for LN and HN). Apparent whole-plant respiration (R A ) was not influenced by increased post-anthesis N fertilizer. Thus, in drought-stressed wheat, the total biomass and straw yield at maturity were increased by increasing N supply. These results suggest that high N supply at anthesis satisfied the grains' increased demand for N by increasing post-floral assimilation, and the surplus assimilates not only compensated for the low-N-induced biomass loss by respiration but may also have increased the straw yield.

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“…Calcium is used to produce of sorbents for mercury emissions control from combustion processes (Ghorishi and Gullett 1998). Studies in China have found that Hg can increase Ca uptake by winter wheat (Triticum aestivum) (Liu et al 2010).…”

Section: Discussionmentioning

confidence: 99%

Mercury Concentration in Technosols and Alder Tissue from a Plantation on a Combustion Waste Disposal Site

Woś

Sroka

Józefowska

et al. 2019

Water Air Soil Pollut

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Combustion of fossil fuels including coal is one of the sources of mercury pollution. Combustion waste from fly ash disposal sites poses a problem for the environment and constitutes a potential source of Hg, thus phytostabilisation is a crucial goal in the mitigation of fossil fuel impact. The paper presents mercury (Hg) concentration in technosols from combustion waste and in individual biomass components (fine roots, bark, stem wood and leaves) of alder species (black, gray and green alder) introduced as part of a long-term experiment to develop a method of phytostabilisation and afforestation of a lignite combustion disposal site. Mercury content in the combustion waste was elevated compared to the data for natural soils from uncontaminated forest areas, however, it did not exceed the amounts considered to be toxic. Hg content in technosols was related to clay and silt fraction content and phosphorus content. Mercury in the alder biomass accumulated mainly in the underground part, especially in the fine roots and displayed a positive correlation with acid and alkaline phosphatase and sulfur content, with no differences in the accumulation of Hg between the alder species. The obtained results indicate that the fine roots are the frontier of Hg biosorption in developed alder systems on combustion waste disposal sites.

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Influence of mercury on chlorophyll content in winter wheat and mercury bioaccumulation

Cited by 32 publications

References 29 publications

Mercury induced phytotoxicity and oxidative stress in wheat (Triticum aestivum L.) plants

Mercury induced phytotoxicity and oxidative stress in wheat (Triticum aestivum L.) plants

The impact of post-anthesis nitrogen and water availability on yield formation of winter wheat

Mercury Concentration in Technosols and Alder Tissue from a Plantation on a Combustion Waste Disposal Site

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