How plants cope with heavy metals

Viehweger, Katrin

doi:10.1186/1999-3110-55-35

Cited by 340 publications

(160 citation statements)

References 149 publications

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“…For example, divalent metal ions, such as iron, zinc, copper, cobalt, and nickel, have been reported to influence secondary metabolites production (Trejo-Tapia et al, 2001). Although these metal ions are micronutrients that play an important role in the activities of proteins involved in maintaining the growth of organisms, at high concentrations they are harmful to living organisms (Viehweger, 2014). Metal ions such as nickel, cobalt, zinc, and manganese are necessary for regulating enzyme activity despite being highly toxic at high concentrations (Ovečka and Takáč, 2014).…”

Section: Introductionmentioning

confidence: 99%

Effects of cobalt nanoparticles on artemisinin production and gene expression in Artemisia annua

Ghasemi

Hosseini²,

Nayeri³

2015

Turk J Bot

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The low artemisinin content in Artemisia has caused this compound to be expensive among medicines. Several attempts have been made to increase its production by altering the expression of different genes. However, no approach has been cost-effective. In this study, the expression levels of SQS and DBR2 genes were quantified by qRT-PCR, and artemisinin content was measured by HPLC in Artemisia annua cell suspension culture under nano cobalt particles elicitation. For this purpose, nano cobalt particles were used in 0.25, 2.5, and 5 mg L -1 concentrations and samples were collected after 8, 24, 48, and 72 h. The highest artemisinin content was observed 24 h after 5 mg L -1 nano cobalt treatment. In this case, artemisinin production was 2.25-fold (113.35 mg g -1 dw) higher than that of the control. Simultaneously, the expression levels of SQS and DBR2 genes decreased. It appears that the decrease in the expression of SQS and DBR2 genes caused the artemisinin content to increase by high concentrations of the nano cobalt particles.

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Section: Introductionmentioning

confidence: 99%

Effects of cobalt nanoparticles on artemisinin production and gene expression in Artemisia annua

Ghasemi

Hosseini²,

Nayeri³

2015

Turk J Bot

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“…Is then the plant prepared to perceive the ingress of a particular (non-essential) element and to denote its presence with an element-specific and unique signal? Metal cations such as Cd 2+ induce NADPH oxidase activity in contacted cell membranes and a rise in the production of reactive oxygen species (ROS) [87] that damage cellular components such as lipids, proteins, carbohydrates, and DNA [88][89][90][91]. ROS incited signals expressed in formation and modulation of mitogen-activated protein kinases (MAPKs), Ca 2+ /calmodulins, nitric oxide, and the common plant hormones alter nuclear gene expression and the formation of cation-neutralizing chelants to control the cellular redox status [92][93][94][95].…”

Section: Discrimination Of Essential and Non-essential Elements Maskementioning

confidence: 99%

Stability of the Inherent Target Metallome in Seed Crops and a Mushroom Grown on Soils of Extreme Mineral Spans

Gramss

Voigt

2016

Agronomy

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Extremes in soil mineral supply alter the metallome of seeds much less than that of their herbage. The underlying mechanisms of mineral homeostasis and the "puzzle of seed filling" are not yet understood. Field crops of wheat, rye, pea, and the mushroom Kuehneromyces mutabilis were established on a set of metalliferous uranium mine soils and alluvial sands. Mineral concentrations in mature plants were determined from roots to seeds (and to fungal basidiospores) by ICP-MS following microwave digestion. The results referred to the concentrations of soil minerals to illustrate regulatory breaks in their flow across the plant sections. Root mineral concentrations fell to a mean of 7.8% in the lower stem of wheat in proportions deviating from those in seeds. Following down-and up-regulations in the flow, the rachis/seed interface configured with cuts in the range of 1.6%-12% (AsPbUZn) and up-regulations in the range of 106%-728% (CuMgMnP) the final grain metallome. Those of pea seeds and basidiospores were controlled accordingly. Soil concentration spans of 9-109ˆin CuFeMnNiZn shrank thereby to 1.3-2ˆin seeds to reveal the plateau of the cultivar's desired target metallome. This was brought about by adaptations of the seed:soil transfer factors which increased proportionally in lower-concentrated soils. The plants thereby distinguished chemically similar elements (As/P; Cd/Zn) and incorporated even non-essential ones actively. It is presumed that high-and low-concentrated soils may impair the mineral concentrations of phloems as the donors of seed minerals. In an analytical and strategic top performance, essential and non-essential phloem constituents are identified and individually transferred to the propagules in precisely delimited quantities.

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“…Lead is easily absorbed and accumulated in different parts of the plants including root, shoot, fruit and grain (Sharma and Shanker, 2005) and causes a serious disorder in plant and animal communities by being inserted into the food chain and exerting high toxicity (Adriano, 2001;Alkorta et al, 2004;Behanzin et al, 2015). At the cellular level, it can affect respiration, photosynthesis, water and mineral absorption, (Nagajyoti et al, 2010), causes oxidative stress and disrupt the activity of various enzymes which are very important for the cellular metabolism (Singh et al, 1997;Viehweger, 2014).…”

Section: Introductionmentioning

confidence: 99%

Lead Phytotoxicity Induced Changes in Biochemical Markers in Germination and Seedlings in Durum Wheat <i>Triticum durum</i> Desf. Cv.Vitron and Gta

Slimani

Boudelaa

Abdelmadjid

et al. 2017

American Journal of Environmental Sciences

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Among the heavy metals most commonly found on land, lead is a strongly represented pollutant in soil and sediments. It is easily absorbed and accumulated in different parts of plants. On the macroscopic scale, lead causes unfavorable effects on plants. First and in the event of excess, it may exert toxicity affecting several stages of germination development in leaf formation and root elongation in the early stages of development. The effect of lead on two varieties of durum wheat Triticum durum cv Gta and Vitron have been analyzed on germination under laboratory conditions. The objective is to determine the influence of lead on (i) germinal parameters and (ii) the stress physiological markers. The experiment was set up in a completely randomized design with 3 replications of 20 seeds per variety, including 4 concentrations of Pb(NO 3 ) 2 (0, 320, 430 and 660 ppm) on the germination. Average ambient temperature was 22°C, the humidity was 32% and photoperiod light/dark was 16/8 h. The obtained results showed a real sensitivity of germination to lead. Indeed, it was noted a total absence of germination of the two varieties in all seeds treated with the highest concentration. The treatment of seeds by the increasing doses of lead decreased the germinative faculty considerably, the content of pigments and disrupted the cellular metabolism, the proteins, the proline and glutathione levels. These results indicated that lead stress caused a decrease in germinal parameters and significant impairment of cell biochemical markers. Such effect was inversely proportional to the doses used. It was also noted that the Gta variety was less sensitive to lead toxicity than Vitron.

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How plants cope with heavy metals

Cited by 340 publications

References 149 publications

Effects of cobalt nanoparticles on artemisinin production and gene expression in Artemisia annua

Effects of cobalt nanoparticles on artemisinin production and gene expression in Artemisia annua

Stability of the Inherent Target Metallome in Seed Crops and a Mushroom Grown on Soils of Extreme Mineral Spans

Lead Phytotoxicity Induced Changes in Biochemical Markers in Germination and Seedlings in Durum Wheat <i>Triticum durum</i> Desf. Cv.Vitron and Gta

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