Metal tolerance and hyperaccumulation: Costs and trade-offs between traits and environment

Maestri, Elena; Marmiroli, Marta; Visioli, Giovanna; Marmiroli, Nelson

doi:10.1016/j.envexpbot.2009.10.011

Cited by 468 publications

(237 citation statements)

References 145 publications

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“…Chelating agents contribute to detoxification and increase plant tolerance to toxic levels of metal ions (GASIC; KORBAN, 2006), and it is already well established that amino acids can be mobilized in response to Pb toxicity to form complexes with this metal (MAESTRI et al, 2010;MANARA, 2012;POURRUT et al, 2011).…”

Section: Organic Solutesmentioning

confidence: 99%

Nutritional and biochemical changes induced by lead in sunflower (Helianthus annuus L.)

Abreu

Sacramento

Alves

et al. 2016

SCA

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The aim of this study was to evaluate the effects of increasing concentrations of lead (Pb) in the nutrient solution on growth and macronutrient and organic solute contents of Helianthus annuus plants. The experimental design was completely randomized with four replications. The dry mass yield was not affected by the treatments up to a Pb concentration of 0.6 mM, indicating that H. annuus was tolerant to this Pb concentration in the growth medium. The reductions in leaf, stem and root dry masses at a Pb concentration of 0.8 mM were 74, 84 and 85%, respectively. Lead stress did not reduce the levels of nitrogen (N), phosphorus (P) and potassium (K), indicating that the growth reduction observed at 0.8 mM Pb could not be attributed to deficiencies of these nutrients. On the other hand, Pb significantly reduced calcium (Ca) and magnesium (Mg) contents in leaves, stems and roots, which might, at least in part, explain the Pb-induced growth reduction in the H. annuus plants. Pb increased soluble carbohydrate, free amino acid and proline contents in leaves, and soluble protein and proline contents in roots, showing stress-induced changes in cell metabolism. The data also suggest that Ca and Mg concentrations may be used as nutritional indicators and the proline content may be used as a biochemical indicator of Pb toxicity in H. annuus.

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Section: Organic Solutesmentioning

confidence: 99%

Nutritional and biochemical changes induced by lead in sunflower (Helianthus annuus L.)

Abreu

Sacramento

Alves

et al. 2016

SCA

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“…Lead impairs plant growth such as root elongation, seed germination, seedling development, transpiration, chlorophyll production, lamellar organization in the chloroplast, and cell division (Gupta, Huang, Yang, Razafindrabe, & Inouhe, 2010;Maestri, Marmiroli, Visioli, & Marmiroli, 2010). However, the extent of these effects varies and depends on the lead concentrations, the duration of exposure, the intensity of plant stress, and the particular organs studied.…”

Section: Introductionmentioning

confidence: 99%

Accumulation and distribution of lead (Pb) in plant tissues of guar (Cyamopsis tetragonolobaL.) and sesame (Sesamum indicumL.): profitable phytoremediation with biofuel crops

Amin

Arain

Jahangir

et al. 2018

Geology, Ecology, and Landscapes

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Contamination of lead indicates one of the major threats to soil system. Phytoremediation technique utilized plants which are able to tolerate and accumulate metals within in their tissues. It has recently been suggested that biofuel plants are more suitable for both utilization and remediation of metal contaminated soil. This study reported Pb phytoremediation potential of Cyamopsis tetragonoloba L. in comparison with Sesamum indicum L. in the framework of a pot-experiment. Plants were subjected to seven Pb concentrations (0, 100, 200, 400, 600, 800 and 1000 mg kg -1 soil) for 12 weeks. Our results demonstrated that both C. tetragonoloba and S. indicum were able to tolerate Pb concentrations up to 1000 mg kg -1 which confirms the plant ability to grow well in higher Pb levels. Significant metal accumulation was observed in root along with reduced biomass for both plants species. Furthermore, both plant species could possibly be used for phytostabilization, with success in marginally polluted soils where their growth would not be impaired and decontamination of Pb could be maintained at satisfying levels. However, bioconcentration factor (BCF), bioaccumulation coefficient (BAC) and translocation factor (TF) values proposed that C. tetragonoloba was more efficient for phytoremediation than S. indicum at higher Pb levels.

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“…Such patterns suggest some trade-off in which species can have superior tolerance of certain situations or superior competitive abilities in other situations, but cannot have both. Many species possess adaptations conferring tolerance of conditions without being dependent on them, for example, plants that tolerate saline (Barbour 1970, Gilbert andFraser 2013) or metal rich soils (Maestri et al 2010, Serrano et al 2015 can usually grow without these salts and metals. Similar patterns occur for temperature: for example, frost tolerance does not imply frost dependence.…”

Section: Introductionmentioning

confidence: 99%

Disturbance and distributions: avoiding exclusion in a warming world

Sheil¹

2016

E&S

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ABSTRACT. I highlight how disturbance determines species distributions and the implications for conservation practice. In particular, I describe opportunities to mitigate some of the threats to species resulting from climate change. Ecological theory shows that disturbance processes can often slow or prevent the exclusion of species by competitors and that different disturbance regimes result in different realized niches. There is much evidence of disturbance influencing where species occur. For example, disturbance can lower the high elevation treeline, thus expanding the area for high elevation vegetation that cannot otherwise persist under tree cover. The role of disturbance in influencing interspecific competition and resulting species persistence and distributions appears unjustly neglected. I identify various implications, including opportunities to achieve in situ conservation by expanding plant species ranges and reducing species vulnerability to competitive exclusion. Suitable frequencies, scales, intensities, spatial configurations, and timings of the right forms of disturbance can improve the persistence of targeted species in a wide range of contexts. Such options could reduce the extinctions likely to be associated with climate change. More generally, these mechanisms and the resulting realizable niche also offer novel insights to understanding and manipulating species distributions.

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Metal tolerance and hyperaccumulation: Costs and trade-offs between traits and environment

Cited by 468 publications

References 145 publications

Nutritional and biochemical changes induced by lead in sunflower (Helianthus annuus L.)

Nutritional and biochemical changes induced by lead in sunflower (Helianthus annuus L.)

Accumulation and distribution of lead (Pb) in plant tissues of guar (Cyamopsis tetragonolobaL.) and sesame (Sesamum indicumL.): profitable phytoremediation with biofuel crops

Disturbance and distributions: avoiding exclusion in a warming world

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