Grain zinc concentrations differ among Brazilian wheat genotypes and respond to zinc and nitrogen supply

Pascoalino, J. A. L.; Thompson, Jacqueline; Wright, G. M.; Franco, F.A.; Scheeren, P. L.; Pauletti, Volnei; Moraes, Milton Ferreira de; White, Philip J.

doi:10.1371/journal.pone.0199464

Cited by 10 publications

(8 citation statements)

References 42 publications

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“…A similar relationship between straw Zn content and grain Zn content was shown by Al-Othman et al [107]. Although Zn translocation from root to shoot following Zn uptake by the root is affected by many factors [114], it seems that adequate N supply was the reason for the greatest Zn accumulation in wheat grain in all fields in the present study, as suggested by other authors [115,116]. The particularly low straw Zn content in Experiment I was probably related to the low Zn abundance in the soil (Table 6).…”

Section: Wheat Grain and Strawsupporting

confidence: 91%

Do New-Generation Recycled Phosphorus Fertilizers Increase the Content of Potentially Toxic Elements in Soil and Plants?

et al. 2021

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Phosphorus (P)-rich secondary raw materials can provide a valuable base for modern mineral fertilizers, provided that the new formulations do not load the soil–plant system with potentially toxic elements. Fertilizers from sewage sludge ash (SSA) and/or animal bones, activated by phosphorus-solubilizing bacteria (Bacillus megaterium or Acidithiobacillus ferrooxidans), were tested in field experiments in north-eastern Poland. The reference provided treatments with superphosphate and treatment without phosphorus fertilization. In one experiment, all P-fertilizers were applied at a P dose of 21 kg·ha−1, and in the other three experiments, three P doses were adopted: 17.6, 26.4, and 35.2 kg·ha−1. The effect of recycled fertilizers on the content of arsenic (As), chromium (Cr), nickel (Ni), copper (Cu), and zinc (Zn) in the soil, in wheat grain and straw (test plant), weeds, and post-harvest residues was investigated. The application of recycled fertilizers in P amounts up to 35.2 kg·ha−1 did not change the As, Cr, Ni, Cu, or Zn contents in the soil and plant biomass. The contents of these elements in soil were below the permissible levels for arable land in Poland. Their concentrations in wheat grain and straw did not exceed the permissible or suggested limits for plant material to be used for food and feed, while in the weed and post-harvest residue biomass, they usually fell within the biological plant variability ranges.

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Section: Wheat Grain and Strawsupporting

confidence: 91%

Do New-Generation Recycled Phosphorus Fertilizers Increase the Content of Potentially Toxic Elements in Soil and Plants?

et al. 2021

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“…(2011a, 2011b) and Pascoalino et al. (2018) under glasshouse conditions. Other authors have shown that N fertilization is important in uptake and accumulation of Zn in grains where it co‐localizes as proteins with Zn in the embryo and aleurone layers (Cakmak et al., 2010a; Erenoglu, Kutman, Ceylan, Yildiz, & Cakmak, 2011; Ozturk et al., 2009).…”

Section: Discussionmentioning

confidence: 93%

“…The application of N fertilizers had been shown to increase grain Zn concentration following foliar Zn fertilizer applications in wheat ( Triticum aestivum L.; Kutman, Yildiz, & Cakmak, 2011a; 2011b); and rice ( Oryza sativa L.; Jaksomsak, Rerkasem, & Prom‐u‐thai, 2017) grown under glasshouse conditions. While these studies revealed that co‐application of N and Zn fertilizers may be a promising strategy for the agronomic biofortification of cereal grains, there is limited information from field conditions (Pascoalino et al., 2018) on crops more commonly grown in SSA. Conversely, yield increases resulting from N fertilizer have also been reported to dilute or marginally increase grain micronutrient concentrations (Alloway, 2008; Fan et al., 2008; Garvin, Welch, & Finley, 2006).…”

Section: Introductionmentioning

confidence: 99%

Nitrogen effect on zinc biofortification of maize and cowpea in Zimbabwean smallholder farms

et al. 2020

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Agronomic biofortification of crops with zinc (Zn) can be enhanced under increased nitrogen (N) supply. Here, the effects of N fertilizer on grain Zn concentration of maize (Zea mays L.) and cowpea (Vigna unguiculata L.) were determined at two contrasting sites in Zimbabwe over two seasons. All treatments received soil and foliar zinc-sulphate fertilizer. Seven N treatments, with three N rates (0, 45, and 90 kg ha −1 for maize; 0, 15, and 30 kg ha −1 for cowpea), two N forms (mineral and organic), and combinations thereof were used for each crop in a randomized complete block design (n = 4). Maize grain Zn concentrations increased from 27.2 to 39.3 mg kg −1 across sites. At 45 kg N ha −1 , mineral N fertilizer increased maize grain Zn concentration more than organic N from cattle manure or a combination of mineral and organic N fertilizers. At 90 kg N ha −1 , the three N fertilizer application strategies had similar effects on maize grain Zn concentration. Co-application of N and Zn fertilizer was more effective at increasing Zn concentration in maize grain than Zn fertilizer alone. Increases in cowpea grain Zn concentration were less consistent, although grain Zn concentration increased from 39.8 to 52.7 mg kg −1 under optimal co-applications of N and Zn. Future cost/benefit analyses of agronomic biofortification need to include information on benefits of agro-fortified grain, complex farmer management decisions (including cost and access to both N and Zn fertilizers), as well as understanding of the spatial and site-specific variation in fertilizer responses.Abbreviations: CRM, certified reference material; NR, natural regions; SSA, sub-Saharan Africa.This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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“…Identifying and mapping of molecular markers for quantitative trait loci (QTL) for grain Zn can facilitate screening for increased grain Zn concentration, and such traits can be easily captured using marker assisted selection (Rawat et al, 2009; Tiwari et al, 2010). However, genetic biofortification is possible only if a broad genetic variability is identified for a given trait (Pascoalino et al, 2018). In practice, this may be achieved by identifying wheat cultivars that grow well in soils with low concentrations of plant‐available Zn (Gomez‐Coronado et al, 2016).…”

Section: Capitalising On Genetic Diversity For Zn Biofortificationmentioning

confidence: 99%

Genetic biofortification of wheat with zinc: Opportunities to fine‐tune zinc uptake, transport and grain loading

Kamaral

Neate

Gunasinghe

et al. 2021

Physiologia Plantarum

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Zinc (Zn) is an important micronutrient in the human body, and health complications associated with insufficient dietary intake of Zn can be overcome by increasing the bioavailable concentrations in edible parts of crops (biofortification). Wheat (Triticum aestivum L) is the most consumed cereal crop in the world; therefore, it is an excellent target for Zn biofortification programs. Knowledge of the physiological and molecular processes that regulate Zn concentration in the wheat grain is restricted, inhibiting the success of genetic Zn biofortification programs. This review helps break this nexus by advancing understanding of those processes, including speciation regulated uptake, root to shoot transport, remobilisation, grain loading and distribution of Zn in wheat grain. Furthermore, new insights to genetic Zn biofortification of wheat are discussed, and where data are limited, we draw upon information for other cereals and Fe distribution. We identify the loading and distribution of Zn in grain as major bottlenecks for biofortification, recognising anatomical barriers in the vascular region at the base of the grain, and physiological and molecular restrictions localised in the crease region as major limitations. Movement of Zn from the endosperm cavity into the modified aleurone, aleurone and then to the endosperm is mainly regulated by ZIP and YSL transporters. Zn complexation with phytic acid in the aleurone limits Zn mobility into the endosperm. These insights, together with synchrotron‐X‐ray‐fluorescence microscopy, support the hypothesis that a focus on the mechanisms of Zn loading into the grain will provide new opportunities for Zn biofortification of wheat.

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Grain zinc concentrations differ among Brazilian wheat genotypes and respond to zinc and nitrogen supply

Cited by 10 publications

References 42 publications

Do New-Generation Recycled Phosphorus Fertilizers Increase the Content of Potentially Toxic Elements in Soil and Plants?

Do New-Generation Recycled Phosphorus Fertilizers Increase the Content of Potentially Toxic Elements in Soil and Plants?

Nitrogen effect on zinc biofortification of maize and cowpea in Zimbabwean smallholder farms

Genetic biofortification of wheat with zinc: Opportunities to fine‐tune zinc uptake, transport and grain loading

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