Heavy metals in vegetables and their impact on the nutrient quality of vegetables: A review

Manzoor, Javid; Sharma, Manoj Kumar; Wani, Khursheed Ahmad

doi:10.1080/01904167.2018.1462382

Cited by 129 publications

(73 citation statements)

References 77 publications

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“…The large number of data here collected contributes to increasing the knowledge in a domain scarcely explored in literature. In fact, the studies regarding trace elements in plants are mainly focused on edible and medicinal herbs, either wild or cultivated, on grasses used as pastures or plants used as bioindicators of metal pollution or bioremediation agents, thus the plant parts investigated are in most cases leaves and roots [ 94 , 95 , 96 , 97 , 98 ], while flowers are very rarely studied.…”

Section: Discussionmentioning

confidence: 99%

Trace Elements in Edible Flowers from Italy: Further Insights into Health Benefits and Risks to Consumers

et al. 2020

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The use of edible flowers in cooking dates back to ancient times, but recently it is gaining success among the consumers, increasingly attentive to healthy and sustainable foods of high quality, without neglecting taste, flavour, and visual appeal. The present study aims to deepen the knowledge regarding the mineral composition of edible flowers, an aspect not widely investigated in scientific literature. The concentrations of Cd, Co, Cu, Fe, Mn, Ni, Pb, Sr, V, and Zn have been determined by Inductively Coupled Plasma Optical Emission Spectrometry (ICP OES) in flowers belonging to a wide variety of species. The study highlights that some floral species are characterized by significantly higher concentrations of certain trace elements, e.g., the flowers of Acmella oleracea for Mn, those of basil (Ocimum basilicum) and of pumpkins (Cucurbita moschata and C. pepo) for Cu and Sr, and those of orange daylily (Hemerocallis fulva) for Ni. Potentially toxic elements are present at low concentrations, often below the limit of the detection for Cd, Co, Ni, V. In all samples, Cd and Pb are well below the maximum permitted levels in foodstuffs. It can be concluded that the edible flowers analyzed can be considered a good source of essential elements and do not present risks for the consumer health as for the mineral composition.

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Section: Discussionmentioning

confidence: 99%

Trace Elements in Edible Flowers from Italy: Further Insights into Health Benefits and Risks to Consumers

et al. 2020

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“…The heavy metal concentration in fresh commodities has been a subject of great concern to consumers. Several factors such as metal concentrations in soils, soil pH, cation exchange capacity, organic matter content, types and varieties of crops have been reported to affect the uptake of heavy metals [33] . It is generally accepted that the metal concentration in soil is the dominant factor as far as residues are concerned [27] .…”

Section: Discussionmentioning

confidence: 99%

Postharvest Quality and Safety of Potted Greenhouse Tomato Grown on Forest Soil-Biosolids substrate, Blended with NPK Fertilizer

Otieno

Nyalala

Wolukau

2020

NJAS

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Studies on the effects of biosolids (BS) amended substrate on food quality and safety in tomato production have not been adequately addressed. The objective of this study was to investigate the influence composted BS and NPK fertilizer in forest soil on post-harvest quality and safety of potted greenhouse tomatoes. Potted tomatoes ‘Maxim F1’were grown in a randomized complete block design with four replications. Inorganic fertilizer NPK fertilizer was applied at 0, 100 and 200 kg ha-1; BS was applied at 0%, 10%, 20%, 30%, and 40% v/v, in all possible combinations. Tomato were harvested and analyzed for ascorbic acid, chlorophylls, carotenoids and total phenolic compounds; weight loss, fruit firmness, titratable acidity and total soluble solids, as well as heavy metals and microbial contaminants. Results revealed that tomato fruit at 10% BS in combination with NPK fertilizer at 100 kg ha-1had highest β-carotene (6.1 mg 100 g-1), lycopene (26.1 mg 100 g-1), ascorbic acids (128.0 mg 100 g-1), total phenolic acids (13.2 mg 100 g-1), total soluble solids (17%). However, the same rates produced tomato fruits with lower titratable acidity (2.2%) and had heavy metal residues within the permissible level, according to International EPA standards on biosolids utilization on food crops production. Similarly, no trace of targeted bacteria; Salmonella, Escherichia coli, Staphylococcus was observed on the ready to eat tomato. This study reveals BS 10% with NPK fertilizer at 100 kg ha-1 substrate as a better option of plant nutrient source for quality and safe greenhouse tomato production.

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“…Anthropogenic activities, such as mineral extraction and the over-application of fertilisers and pesticides, are also related to increases in heavy metal pollution, including excess hexachromium (Cr), cadmium (Cd), arsenic (As), lead (Pb), copper (Cu), and mercury (Hg). These pollutants affect plant developmental processes, such as seed germination, and the rates of photosynthesis, respiration, and transpiration, thus reducing growth, yield and quality [9,10] (Figure 1). These situations thus demand changes in agricultural practices to respond to the negative impacts of climate change and anthropogenic activities.…”

Section: Introductionmentioning

confidence: 99%

Abiotic Stress in Crop Species: Improving Tolerance by Applying Plant Metabolites

Godoy

Olivos-Hernández

Stange

et al. 2021

Plants

172

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Reductions in crop yields brought about by abiotic stress are expected to increase as climate change, and other factors, generate harsher environmental conditions in regions traditionally used for cultivation. Although breeding and genetically modified and edited organisms have generated many varieties with greater abiotic stress tolerance, their practical use depends on lengthy processes, such as biological cycles and legal aspects. On the other hand, a non-genetic approach to improve crop yield in stress conditions involves the exogenous application of natural compounds, including plant metabolites. In this review, we examine the recent literature related to the application of different natural primary (proline, l-tryptophan, glutathione, and citric acid) and secondary (polyols, ascorbic acid, lipoic acid, glycine betaine, α-tocopherol, and melatonin) plant metabolites in improving tolerance to abiotic stress. We focus on drought, saline, heavy metal, and temperature as environmental parameters that are forecast to become more extreme or frequent as the climate continues to alter. The benefits of such applications are often evaluated by measuring their effects on metabolic, biochemical, and morphological parameters in a variety of crop plants, which usually result in improved yields when applied in greenhouse conditions or in the field. As this strategy has proven to be an effective way to raise plant tolerance to abiotic stress, we also discuss the prospect of its widespread implementation in the short term.

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Heavy metals in vegetables and their impact on the nutrient quality of vegetables: A review

Cited by 129 publications

References 77 publications

Trace Elements in Edible Flowers from Italy: Further Insights into Health Benefits and Risks to Consumers

Trace Elements in Edible Flowers from Italy: Further Insights into Health Benefits and Risks to Consumers

Postharvest Quality and Safety of Potted Greenhouse Tomato Grown on Forest Soil-Biosolids substrate, Blended with NPK Fertilizer

Abiotic Stress in Crop Species: Improving Tolerance by Applying Plant Metabolites

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