Selenium supplementation of Portuguese wheat cultivars through foliar treatment in actual field conditions

Galinha, Catarina; Freitas, Maria do Carmo Duarte; Pacheco, A. M. G.; Coutinho, José Moacyr Vianna; Maçãs, Benvindo; Almeida, Ana Sofia

doi:10.1007/s10967-012-2372-z

Cited by 23 publications

(8 citation statements)

References 13 publications

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“…The concentration of Se was determined in powdered grains harvested from controls and after foliar fertilization with selenite and selenate at 30, 60, 120, 180 and 300 g Se ha −1 . Grains were subjected to cyclical analysis through neutron activation (Galinha et al, 2013), being the samples irradiated with a neutron flux of 1.7 × 10 12 cm 2 s −1 , in a fast-pneumatic system. Grain X-ray analysis was done using a Niton Thermal Scientific XLT, as described by Pataco et al (2017).…”

Section: Methodsmentioning

confidence: 99%

Selenium Biofortification of Rice Through Foliar Application With Selenite and Selenate

Lidon¹,

Oliveira²,

Galhano³

et al. 2018

Ex. Agric.

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SUMMARYSelenium (Se) is an essential micronutrient for humans, yet its dietary intake is low, mostly due to the low bioavailability in soils and therefore in edible plant tissues. To overcome Se deficiency, the breeding approach (i.e., genetic biofortification), namely in rice, is largely dependent on available Se pools. To ensure the success of genetic biofortification with Se, agronomic biofortification can be accomplished through foliar Se application. Considering this background, the main hypothesis of this work was centered in the foliar application of Se to attain agronomic biofortification of rice crops. This study also aimed to assess the full potential for increasing grain Se concentrations during rice filling, as well as the types of nutrients deposition. An experimental design applying two foliar fertilizers (sodium selenite and sodium selenate) was developed. As test systems, four rice genotypes (Ariete, Albatros, OP1105 and OP1109) were used and the kinetics of micro- and macro-nutrients accumulation and deposition were assessed. Biofortification was performed in field trials for two years with foliar fertilization ranging between 0 and 300 g Se ha−1. At the end of the plant cycle, selenite applications triggered 427- to 884-fold increases in grain Se concentrations among rice genotypes (Albatros > OP1105 > OP1109 > Ariete). The application of selenate also prompted 128- to 347-fold increases in grain Se concentrations in rice crops (Albatros > OP1105 > Ariete > OP1109). Regardless of the foliar fertilizer applied, Se deposition among genotypes occurred throughout the grain without relevant inhibitory effects on yields. In each genotype, micro and macronutrients varied among crop tissues.

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Section: Methodsmentioning

confidence: 99%

Selenium Biofortification of Rice Through Foliar Application With Selenite and Selenate

Lidon¹,

Oliveira²,

Galhano³

et al. 2018

Ex. Agric.

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“…An overview of the response of wheat cultivars to supplementation is given in Table 2, in terms of total Se by CNAA (Galinha et al 2013) and ICP-MS (this work). Other than an appreciable increment in Se levels of the supplemented crops, there is an excellent agreement between values by both techniques, wherever that comparison is possible.…”

Section: Selenium Accumulationmentioning

confidence: 99%

Characterization of selenium-enriched wheat by agronomic biofortification

et al. 2014

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Agronomic biofortification of staple crops is an effective way to enhance their contents in essential nutrients up the food chain, with a view to correcting for their deficiencies in animal or human status. Selenium (Se) is one such case, for its uneven distribution in the continental crust and, therefore, in agricultural lands easily translates into substantial variation in nutritional intakes. Cereals are far from being the main sources of Se on a content basis, but they are likely the major contributors to intake on a dietary basis. To assess their potential to assimilate and biotransform Se, bread and durum wheat were enriched with Se through foliar and soil addition at an equivalent field rate of 100 g of Se per hectare (ha), using sodium selenate and sodium selenite as Se-supplementation matrices, in actual field conditions throughout. Biotransformation of inorganic Se was evaluated by using HPLC−ICP-MS after enzymatic hydrolysis for Se-species extraction in the resulting mature wheat grains. Selenomethionine and Se VI were identified and quantified: the former was the predominant species, representing 70-100 % of the total Se in samples; the maximum amount of inorganic Se was below 5 %. These results were similar for both supplementation methods and for both wheat varieties. Judging from the present results, one can conclude that agronomic biofortification of wheat may improve the nutritional quality of wheat grains with significant amounts of selenomethionine, which is an attractive option for increasing the Se status in human diets through Se-enriched, wheat-based foodstuff.

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“…Under semiarid Mediterranean or other similar conditions, characterised by scarce precipitations and irregularity in the rainfall, Se biofortification have shown a different pattern, with a higher accumulation potential, at least in other cereals such as two-rowed barley and hard wheat (Rodrigo, Santamaria, Lopez-Bellido, & Poblaciones, 2013;Poblaciones, Rodrigo, Santamaria, Chen, & McGrath, 2014). On bread making wheat, although there are studies in Portugal (Galinha et al, 2013), Australia (Lyons et al, 2004) and New Zealand (Curtin, Hanson, & van der Weerden, 2008), the effect of the Se biofortification under Mediterranean conditions is still poorly understood.…”

Section: Introductionmentioning

confidence: 99%

Selenium Application Timing: Influence in Wheat Grain and Flour Selenium Accumulation Under Mediterranean Conditions

Rodrigo¹,

Santamaría²,

Poblaciones³

2014

JAS

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Millions of people have an inadequate supply of selenium (Se) and Se-biofortified crops could prevent such deficiency. In order to establish an effective Se biofortification program under Mediterranean conditions on wheat, the objective of the present study was to evaluate the effect of the Se application timing on the Se accumulation in the grain, yield and protein content. In a field experiment, ten g ha -1 of sodium selenate were foliar-applied at four different growth stages: at 1 st node detectable (GS-31); at 5 th node detectable (GS-35); at boots just swollen (GS-45); and at 1 st spikelet visible (GS-51), in two different growing seasons, 2010-2011 and 2011-2012. The application of Se between GS-35 and GS-45 produced the highest Se accumulation in grain, especially in humid years. The milling process caused Se losses of about 15%. In the special conditions of the Mediterranean area, a proper timing of Se application might have major importance in the Se accumulation in the grain, but due to the rainfall before application, rather than to the plant growth stage.

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Selenium supplementation of Portuguese wheat cultivars through foliar treatment in actual field conditions

Cited by 23 publications

References 13 publications

Selenium Biofortification of Rice Through Foliar Application With Selenite and Selenate

Selenium Biofortification of Rice Through Foliar Application With Selenite and Selenate

Characterization of selenium-enriched wheat by agronomic biofortification

Selenium Application Timing: Influence in Wheat Grain and Flour Selenium Accumulation Under Mediterranean Conditions

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