Plant-specific responses to zinc contamination in a semi-field lysimeter and on hydroponics

Bernhard, Roland; Verkleij, J. A. C.; Nelissen, H. J. M.; Vink, Jos P.M.

doi:10.1016/j.envpol.2005.02.015

Cited by 18 publications

(7 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The use of naturally contaminated soils instead of spiked soils can shorten the differences between lab and field experiments in the description of natural processes. It has been show that data resulting from such studies are in line with those obtained from field conditions (Bernhard et al, 2005).…”

Section: Introductionsupporting

confidence: 69%

Solanum nigrum grown in contaminated soil: Effect of arbuscular mycorrhizal fungi on zinc accumulation and histolocalisation

Marques

Oliveira

Samardjieva

et al. 2007

Environmental Pollution

View full text Add to dashboard Cite

Zn tissue accumulation in Solanum nigrum grown in a non-contaminated and a naturally contaminated Zn matrix and the effect of inoculation with different arbuscular mycorrhizal fungi (AMF) on metal uptake were assessed. S. nigrum grown in the contaminated soil always presented higher Zn accumulation in the tissues, accumulating up to 1622 mg Zn kg(-1). The presence of both Glomus claroideum and Glomus intraradices enhanced the uptake and accumulation of Zn by S. nigrum (up to 83 and 49% higher Zn accumulation, respectively). The main deposits of the metal were found in the intercellular spaces and in the cell walls of the root tissues, as revealed by autometallography, with the inoculation with different AMF species causing no differences in the location of Zn accumulation. These findings indicate that S. nigrum inoculated with selected heavy metal tolerant AMF presents extracting and accumulating capacities, constituting a potentially suitable remediation method for Zn polluted soils.

show abstract

Section: Introductionsupporting

confidence: 69%

Solanum nigrum grown in contaminated soil: Effect of arbuscular mycorrhizal fungi on zinc accumulation and histolocalisation

Marques

Oliveira

Samardjieva

et al. 2007

Environmental Pollution

View full text Add to dashboard Cite

show abstract

“…In fact, it is necessary for obtaining more accurate metal concentrations accumulated in the roots to remove the adsorbed and apoplastically bound metal ions on the root surface. Based on many documents, a solution containing 0.5 m M CaCl 2 [or 5 m M Pb(NO 3 ) 2 ] and 20 m M Na‐EDTA is usually used for removing the adsorbed Zn 2+ and Pb 2+ , respectively (Bernhard et al , Gupta et al , Caldelas et al ). However, in our study, we think that the adsorbed ions taken into the metal concentration in roots might not affect our main conclusions significantly for a number of reasons.…”

Section: Discussionmentioning

confidence: 99%

Comparative study of metal resistance and accumulation of lead and zinc in two poplars

Chen

Gao

Zhu

et al. 2013

Physiologia Plantarum

View full text Add to dashboard Cite

In our study, we tested two poplars, Populus beijingensis and Populus cathayana, as model species for their potential for phytoremediation by measuring changes in biomass, pigments, superoxide radicals (O2(-)), cellular ultrastructure and their ability for O2(-) quenching and heavy metal accumulation when exposed to Pb, Zn and their interaction in a hydroponic system. Exposure to Pb did not cause a significant decrease in biomass in either P. beijingensis or P. cathayana. Correspondingly, no obvious impairment in cellular organelles was observed in either species, although the former species translocated a higher fraction of Pb to its shoots than the latter. In contrast, there were significant decreases in biomass and pigment content, and serious impairments in ultrastructure in both species when exposed to either Zn alone or to a combined treatment. Under such conditions, P. beijingensis showed smaller losses of biomass and pigments but a greater ability to quench O2(-) and maintained relatively intact cellular organelles compared with P. cathayana. Under the combined stress, there were no obvious additive effects on biomass, pigments or cellular impairment, whereas synergistic effects on metal absorption and accumulation in both species were observed when compared with exposure to either alone. Thus, the attribute of synergistic uptake and translocation in both species validates their potential to remediate soil contaminated by multiple metals. Moreover, our results indicated that P. beijingensis is a better potential candidate for phytoremediation than P. cathayana, due to its greater phytoremediation efficiency as well as its higher tolerance capacity.

show abstract

“…This might be attributed to differences in the growth environment in different years. Variation in critical shoot Zn concentration is observed among studies of other brassicaceous species, such as Brassica napus L. (compare [45][46][47][48][49]) and Brassica juncea (L.) Czern [50][51][52] that might be related to either the genotypes studied or the experimental conditions.…”

Section: Discussionmentioning

confidence: 99%

Limits to the Biofortification of Leafy Brassicas with Zinc

et al. 2018

View full text Add to dashboard Cite

Many humans lack sufficient zinc (Zn) in their diet for their wellbeing and increasing Zn concentrations in edible produce (biofortification) can mitigate this. Recent efforts have focused on biofortifying staple crops. However, greater Zn concentrations can be achieved in leafy vegetables than in fruits, seeds, or tubers. Brassicas, such as cabbage and broccoli, are widely consumed and might provide an additional means to increase dietary Zn intake. Zinc concentrations in brassicas are limited primarily by Zn phytotoxicity. To assess the limits of Zn biofortification of brassicas, the Zn concentration in a peat:sand (v/v 75:25) medium was manipulated to examine the relationship between shoot Zn concentration and shoot dry weight (DW) and thereby determine the critical shoot Zn concentrations, defined as the shoot Zn concentration at which yield is reduced below 90%. The critical shoot Zn concentration was regarded as the commercial limit to Zn biofortification. Experiments were undertaken over six successive years. A linear relationship between Zn fertiliser application and shoot Zn concentration was observed at low application rates. Critical shoot Zn concentrations ranged from 0.074 to 1.201 mg Zn g −1 DW among cabbage genotypes studied in 2014, and between 0.117 and 1.666 mg Zn g −1 DW among broccoli genotypes studied in 2015-2017. It is concluded that if 5% of the dietary Zn intake of a population is currently delivered through brassicas, then the biofortification of brassicas from 0.057 to > 0.100 mg Zn g −1 DW through the application of Zn fertilisers could increase dietary Zn intake substantially.

show abstract

Plant-specific responses to zinc contamination in a semi-field lysimeter and on hydroponics

Cited by 18 publications

References 27 publications

Solanum nigrum grown in contaminated soil: Effect of arbuscular mycorrhizal fungi on zinc accumulation and histolocalisation

Solanum nigrum grown in contaminated soil: Effect of arbuscular mycorrhizal fungi on zinc accumulation and histolocalisation

Comparative study of metal resistance and accumulation of lead and zinc in two poplars

Limits to the Biofortification of Leafy Brassicas with Zinc

Contact Info

Product

Resources

About