Strategies to increase zinc deficiency tolerance and homeostasis in plants

Henriques, Ariadne Ribeiro; Chalfun-Júnior, Antônio; Aarts, Mark G. M.

doi:10.1590/s1677-04202012000100002

Cited by 31 publications

(18 citation statements)

References 41 publications

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“…The Mo concentration in wormwood at all sampling sites was relatively consistent, within the range of 11.6-13.9 mg·kg −1 . Zn is also an essential element for plant growth, but an excess of Zn can damage plants [41]. The Zn concentration in general plants ranged from 20 to 150 mg·kg −1 , covering the levels in wormwood, 38.6-53.8 mg·kg −1 .…”

Section: Variations In Heavy-metal Concentrations In Plantsmentioning

confidence: 99%

Pollution Assessment of Heavy Metals in Soils and Plants around a Molybdenum Mine in Central China

Han¹,

Wan²,

Tian³

et al. 2018

Pol. J. Environ. Stud.

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Although environmental problems caused by metal mining have become increasingly prominent, the pollution by associated heavy metals is easily neglected. In general, molybdenum mines are lowgrade and hence the high level of associated heavy metals easily causes pollution in the surrounding areas. Here we investigated the total concentrations and forms of Mo and associated Cu, Cd, Pb, and Zn in soils under different land-use types (barren, wheat, rape, and apple-seedling fields) and different plants (cultivated crops and wild wormwood) around an abandoned molybdenum tailings site. The results showed that the average total concentrations of Cu and Zn in farmland bulk soils around the site exceeded the level II standard of the National Environmental Quality Standard for Soils in China, the average Cd and Pb concentrations exceeded the level III standard, and the average Mo concentration exceeds the soil background value in Shaanxi Province. The percentages of available heavy metals in wormwood and seedling rhizosphere soils were significantly higher than those in crop rhizosphere soils. Heavy metals mainly accumulated in the roots of plants tested in this study. The Cu, Cd, and Pb concentrations in wormwood exceeded the limits of these metals in general plants. The Cd and Pb pollution indices of corn at the side of the barren land were 3.12 and 2.48, respectively, and the Pb pollution index of rape was 3.42, according to the standard limit of pollutants in food for China. On the basis of the level III standard, the pollution assessment of soils revealed serious pollution of the barren land and wheat fields, and moderate pollution of the rape and seedling fields. This study indicates that the heavy metals associated with

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Section: Variations In Heavy-metal Concentrations In Plantsmentioning

confidence: 99%

Pollution Assessment of Heavy Metals in Soils and Plants around a Molybdenum Mine in Central China

Han¹,

Wan²,

Tian³

et al. 2018

Pol. J. Environ. Stud.

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show abstract

“…Liming, a practice to correct the natural acidity of these soils, is often used and further reduces the availability of Zn to plants, possibly increasing the affinity of this element to specific adsorption sites in the soil (Cunha et al, 2008). Low availability of this metal results in significant reductions in productivity and nutritional quality of food (Henriques et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…Regions with soil Zn deficiency are deeply correlated with those that have a high incidence of Zn deficiency in the population (Henriques et al, 2012). When crop cultures are the main alimentary sources for the local human and animal population, Zn deficiency in the diet is unavoidable (Erenoglu et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Mineral enrichment in carrot with different sources and doses of zinc

et al. 2018

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A deficiência de zinco (Zn) no solo e plantas e seu baixo estado nutricional na população estimulam estudos sobre enriquecimento de produtos agrícolas. A cenoura tem potencial para o enriquecimento, pois é um vegetal comumente consumido. O objetivo deste estudo foi avaliar as fontes de Zn (ZnO, ZnSO 4 ou ZnEDTA) e a dose (0, 5, 10, 20 and 30 mg dm -3 ) aplicadas no solo a fim de aumentar a concentração do mineral na parte comestível da cenoura. ZnSO 4 foi mais adequado para esse papel, porque apresentou maior acúmulo com o aumento da dose de tratamento. A melhor dose foi 19,45 mg dm -3 de ZnSO 4, a qual apresentou maior teor de Zn nas cenouras. Além disso, este tratamento aumentou o teor de Zn na raiz em 7 vezes comparado com o controle. O baixo custo da produção de cenouras enriquecidas com Zn as torna uma hortaliça potencial para a redução da deficiência deste micronutriente na nutrição populacional. Palavras-chave:Daucus carota L.; enriquecimento; deficiência nutricional; micronutriente. ABSTRACT RESUMO Mineral enrichment in carrot with different sources and doses of zinc 1Zinc (Zn) deficiency in soil and plants and its low nutritional status in the population encourage studies on enrichment of agricultural products. Carrot has potential to enrichment because it is a commonly consumed vegetable. The objective of this study was to evaluate Zn sources (ZnO, ZnSO 4 , or ZnEDTA) and doses (0, 5, 10, 20, and 30 mg dm -3 ) applied to the soil to increase the concentration of this mineral in the carrot edible part. Zinc sulfate was the most suitable source for this role because it had a higher accumulation with the increase of treatment dose. The best dose was 19.45 mg dm -3 of ZnSO 4 , which resulted the highest content of Zn in carrots. Moreover, this treatment increased Zn in the root by seven times compared with the control. The low production cost of Zn enrichment of carrots makes them a potential vegetable for the deficiency reduction of this micronutrient in the population nutrition.

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“…Zinc is an essential micronutrient responsible for the maintenance of vital processes in all living organisms. It plays a fundamental role in several critical cellular functions such as biomembrane integrity, carbohydrate metabolism, antioxidative defense, and stability of genetic materials (Henriques et al, 2012). However, zinc deficiency is a very common problem recognized as one of the major global challenges to public health and agriculture in the 21st century (Pfeiffer and McClafferty, 2007).…”

Section: Introductionmentioning

confidence: 99%

Identification and characterization of the bZIP transcription factor involved in zinc homeostasis in cereals

Henriques¹,

Farias²,

Oliveira³

2017

Genet. Mol. Res.

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Members of the basic leucine zipper family, as bZIP19, are considered to be essential regulators of the adaptation to zinc deficiency. Knowing that this gene as well as its targets are conserved in the plant kingdom, we followed an in silico approach to identify and characterize the bzip19 gene in cereals. Through BLASTp in Phytozome database, 33 bzip19 genes were identified on the genomes of Oryza sativa, Sorghum bicolor, Zea mays, Glycine max, Triticum aestivum, and Brachypodium distachyon. The analysis of conserved motifs and bZIP domains was performed using MEME and PFAM databases. In 25 of these genes, CysHis-motifs at the basic N-terminal region were found. This motif is conserved in group bZIP and suggested to play a role as a Zn-sensor. Regarding their phylogeny, it was possible to infer orthologous groups and explore the evolutionary relationship between these BZIP19 proteins. Data mining allowed us to select eight putative orthologous whose expression profile was analyzed under stress conditions in the Genevestigator platform. The comparison between the expression profiles of these eight putative orthologous and the original Arabidopsis bzip19 also seems to indicate conserved transcriptional regulation. Thus, considering that modified expression of bZIP19 genes has already been confirmed as an efficient tool to improve Arabidopsis tolerance to Zn deficiency, and that these new bZIP orthologous have a high level of conservation when compared to the original bZIP19 sequence, they can be useful for the development of tolerant crops enabling plants to grow in areas of low zinc bioavailability.

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Strategies to increase zinc deficiency tolerance and homeostasis in plants

Cited by 31 publications

References 41 publications

Pollution Assessment of Heavy Metals in Soils and Plants around a Molybdenum Mine in Central China

Pollution Assessment of Heavy Metals in Soils and Plants around a Molybdenum Mine in Central China

Mineral enrichment in carrot with different sources and doses of zinc

Identification and characterization of the bZIP transcription factor involved in zinc homeostasis in cereals

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