Plant Genotypic Differences Under Metal Deficient and Enriched Conditions

Lindberg, Sylvia; Greger, Maria

doi:10.1007/978-94-017-2660-3_14

Cited by 7 publications

(3 citation statements)

References 61 publications

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“…Despite the fact that nickel is essential for normal plant functioning, symptoms of natural deficiency are uncommon because most soils contain adequate amounts of the element (Lindberg and Greger 2002). Moreover, deficiency symptoms produced by Ni are very similar to those produced by deficiencies of other essential plant nutrients (Wood et al 2004.…”

Section: Causes and Symptoms Of Nickel Deficiency In Plantsmentioning

confidence: 99%

Essential Roles and Hazardous Effects of Nickel in Plants

Ahmad

Ashraf²

2011

Reviews of Environmental Contamination and Toxicology

140

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With the world's ever increasing human population, the issues related to environmental degradation of toxicant chemicals are becoming more serious. Humans have accelerated the emission to the environment of many organic and inorganic pollutants such as pesticides, salts, petroleum products, acids, heavy metals, etc. Among different environmental heavy-metal pollutants, Ni has gained considerable attention in recent years, because of its rapidly increasing concentrations in soil, air, and water in different parts of the world. The main mechanisms by which Ni is taken up by plants are passive diffusion and active transport. Soluble Ni compounds are preferably absorbed by plants passively, through a cation transport system; chelated Ni compounds are taken up through secondary, active-transport-mediated means, using transport proteins such as permeases. Insoluble Ni compounds primarily enter plant root cells through endocytosis. Once absorbed by roots, Ni is easily transported to shoots via the xylem through the transpiration stream and can accumulate in neonatal parts such as buds, fruits, and seeds. The Ni transport and retranslocation processes are strongly regulated by metal-ligand complexes (such as nicotianamine, histidine, and organic acids) and by some proteins that specifically bind and transport Ni. Nickel, in low concentrations, fulfills a variety of essential roles in plants, bacteria, and fungi. Therefore, Ni deficiency produces an array of effects on growth and metabolism of plants, including reduced growth, and induction of senescence, leaf and meristem chlorosis, alterations in N metabolism, and reduced Fe uptake. In addition, Ni is a constituent of several metallo-enzymes such as urease, superoxide dismutase, NiFe hydrogenases, methyl coenzyme M reductase, carbon monoxide dehydrogenase, acetyl coenzyme-A synthase, hydrogenases, and RNase-A. Therefore, Ni deficiencies in plants reduce urease activity, disturb N assimilation, and reduce scavenging of superoxide free radical. In bacteria, Ni participates in several important metabolic reactions such as hydrogen metabolism, methane biogenesis, and acetogenesis. Although Ni is metabolically important in plants, it is toxic to most plant species when present at excessive amounts in soil and in nutrient solution. High Ni concentrations in growth media severely retards seed germinability of many crops. This effect of Ni is a direct one on the activities of amylases, proteases, and ribonucleases, thereby affecting the digestion and mobilization of food reserves in germinating seeds. At vegetative stages, high Ni concentrations retard shoot and root growth, affect branching development, deform various plant parts, produce abnormal flower shape, decrease biomass production, induce leaf spotting, disturb mitotic root tips, and produce Fe deficiency that leads to chlorosis and foliar necrosis. Additionally, excess Ni also affects nutrient absorption by roots, impairs plant metabolism, inhibits photosynthesis and transpiration, and causes ultrastructural modificat...

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Section: Causes and Symptoms Of Nickel Deficiency In Plantsmentioning

confidence: 99%

Essential Roles and Hazardous Effects of Nickel in Plants

Ahmad

Ashraf²

2011

Reviews of Environmental Contamination and Toxicology

140

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“…Tolerance to and accumulation of HMs in plants are genetically determined and significant polymorphism of these traits exists on a species level governing intraspecific variations between varieties and populations (McLaughlin et al 1997;Lindberg and Greger 2002). Particularly, considerable variability in Cd tolerance was found among varieties of pea (Belimov et al 2003a) and Indian mustard ), cultivars of rice (Cardoso et al 2002), ecotypes of Cistus ladanifer (Kidd et al 2004) and clones of various willow species, including Salix viminalis, Salix caprea, Salix fragilis, Salix purpurea and Populus nigra (Dos Santos Utmazian et al 2007a;Lindberg and Greger 2002;Puschenreiter et al 2010). However, little is known how variability of these traits may be involved and affect interactions of plants with microbes in the presence of elevated cadmium concentrations.…”

mentioning

confidence: 99%

Role of Plant Genotype and Soil Conditions in Symbiotic Plant-Microbe Interactions for Adaptation of Plants to Cadmium-Polluted Soils

Belimov

Puhalsky

Safronova

et al. 2015

Water Air Soil Pollut

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We highlighted some of the key problems associated with the use of beneficial microorganisms for improving adaptation of plants to soils, polluted with heavy metals (HMs), especially Cd. Inoculation of pea line SGE and its Cd-tolerant mutant SGECd t with nodule bacteria Rhizobium leguminosarum bv. viciae demonstrated that nodulation process may be disturbed at Cd concentrations below threshold toxicity levels for each partner and the plant genotype plays a major role in nodulation under Cd stress. A comparative mathematical analysis of available information about Cd tolerance, accumulation of HMs (Cd, Cr, Cu, Ni, Pb, Sr and Zn), response to mycorrhizal fungus Glomus sp. and 15 phenotypic traits of 99 pea varieties revealed that (1) the Cd-sensitive varieties were more efficient in exploring the protective potential of symbiosis to compensate their deficit in Cd tolerance and (2) correlations between the studied traits exist and can be helpful for selection of plant-microbe systems adapted to polluted soils. In pot experiment with 11 varieties of Indian mustard, the plant growth-promoting effect of rhizobacterium Variovorax paradoxus 5C-2 negatively correlated with Cd tolerance and shoot Cd concentration of the plants grown in Cd-supplemented soil. In an outdoor pot experiment, inoculation of willow with the ectomycorrhizal fungus Pisolithus tinctorius and a cocktail of rhizobacteria stimulated root exudation, decreased soil pH and increased Cd mobilization in soil and Cd uptake by plants, but decreased plant growth at a moderate contamination level (25 mg Cd kg −1 ). Opposite effects were observed in highly contaminated soil (77 mg Cd kg −1 ). We propose a preliminary systematic framework of interactions between these factors that determine the success of microbial inoculation aimed at improving crop performance on HM-polluted soils or enhancing phytoremediation.

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“…It is well known [19] that protective mechanisms can be constitutive or inducible and that there are genetic differences between Cu-tolerant and Cu-sensitive organisms of the same species.…”

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confidence: 99%

Copper excess-induced large reversible and small irreversible adaptations in a population of Chlamydomonas reinhardtii CW15 (Chlorophyta)

et al. 2018

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Two Chlamydomonas reinhardtii CW15 populations modified by an excess of copper in growth medium were obtained: a "Cu" population that was continuously grown under the selection pressure of 5 µM Cu 2+ (for at least 48 weeks) and the "Re" population, where a relatively short (9 week) exposure to elevated copper, necessary for acquiring tolerance, was followed by a prolonged period (at least 39 weeks) of cultivation at a normal (0.25 µM) copper concentration.Cells of the Cu population were able to multiply at a Cu 2+ concentration 16 times higher than that of the control population at a normal light intensity and at a Cu 2+ concentration 64 times higher when cultivated in dim light. The potential quantum yield of photosystem II (F V /F M ratio) under copper stress was also significantly higher for the Cu population than for Re and control populations.The Re population showed only residual tolerance towards the elevated concentration of copper, which is revealed by an F V /F M ratio slightly higher than in the control population under Cu 2+ stress in dim light or in darkness. We postulate that in the Chlamydomonas populations studied in this paper, at least two mechanisms of copper tolerance operate. The first mechanism is maintained during cultivation at a standard copper concentration and seems to be connected with photosynthetic apparatus. This mechanism, however, has only low adaptive value under excess of copper. The other mechanism, with a much higher adaptive value, is probably connected with Cu 2+ homeostasis at the cellular level, but is lost during cultivation at a normal copper concentration.

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Plant Genotypic Differences Under Metal Deficient and Enriched Conditions

Cited by 7 publications

References 61 publications

Essential Roles and Hazardous Effects of Nickel in Plants

Essential Roles and Hazardous Effects of Nickel in Plants

Role of Plant Genotype and Soil Conditions in Symbiotic Plant-Microbe Interactions for Adaptation of Plants to Cadmium-Polluted Soils

Copper excess-induced large reversible and small irreversible adaptations in a population of Chlamydomonas reinhardtii CW15 (Chlorophyta)

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