{"id":796,"date":"2019-05-02T12:41:23","date_gmt":"2019-05-02T12:41:23","guid":{"rendered":"http:\/\/horizon.peachpuff-wolverine-566518.hostingersite.com\/?p=796"},"modified":"2019-05-06T12:10:56","modified_gmt":"2019-05-06T12:10:56","slug":"boosting-nutrients-in-crops-to-beat-hidden-hunger-of-poor-diet","status":"publish","type":"post","link":"https:\/\/scienceblog.com\/horizon\/796\/boosting-nutrients-in-crops-to-beat-hidden-hunger-of-poor-diet\/","title":{"rendered":"Boosting nutrients in crops to beat \u2018hidden hunger\u2019 of poor diet"},"content":{"rendered":"
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Boosting the levels of micronutrients like zinc in popular grain crops could help to reduce a \u2018hidden hunger\u2019 experienced by millions of people across Europe and around the world.<\/strong><\/h3>\n<\/div>\n<\/div>\n<\/div>\n
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More than two billion children and adults globally<\/a> are estimated to suffer from deficiencies of crucial vitamins and minerals due to poor diet.<\/p>\n

Unlike undernourishment \u2013 where people cannot get enough calories to eat \u2013 the effects of micronutrient deficiency are less obvious as it does not cause starvation. Instead it leads to a wide range of health problems that can impair and radically shorten people\u2019s lives.<\/p>\n

This has resulted in the problem being described as a hidden hunger that affects not just poorer parts of the world, but is also an increasing problem in richer, more developed countries.<\/p>\n

But researchers are now looking for ways of improving the levels of key micronutrients in foods that are widely eaten in an attempt to tackle these deficiencies.<\/p>\n

\u2018There are people all over the world who are getting enough calories to eat, but are not getting enough zinc, iodine, iron and vitamins in their diet,\u2019 said Dr Agnieszka Mierek-Adamska, a biochemist at the University of Warwick in the UK. \u2018This can have severe health consequences.\u2019<\/p>\n

Although only tiny amounts of these substances are needed by the human body, they are essential for all of the basic biochemical processes that allow us to live. They form key parts of the enzymes, hormones and proteins that run our bodies.<\/p>\n

Micronutrient deficiency can lead to a wide range of diseases including anaemia, osteoporosis, blindness, growth stunting, impaired brain development and reduced immunity to infection. The effects are particularly pronounced in children and pregnant women<\/a>.<\/p>\n

Sorghum<\/strong><\/p>\n

Dr Mierek-Adamska is attempting to increase the amount of zinc in the world\u2019s fifth most important cereal crop, sorghum, in the hope of boosting levels of this vital nutrient in people\u2019s diets. Across much of Africa and Asia sorghum is used to create traditional flat breads, but it is also widely grown in Mexico, the United States and Australia.<\/p>\n

\u2018Many grains like sorghum can actually contain good levels of zinc, but the metal is not just flying around alone in the edible bits of the plant,\u2019 said Dr Mierek-Adamska, who is conducting her research under the PMTFOS<\/a> project. \u2018The zinc is bound strongly to something called phytic acid, so when the grain is digested, the zinc cannot be absorbed by the gut.\u2019<\/p>\n

But one particular family of proteins called metallothioneins, which are found in all plants, are able to bind zinc in a\u00a0different\u00a0way, meaning they release the metal more easily during digestion. Dr Mierek-Adamska believes it may be possible to use these proteins to boost the amount of zinc consumers can get from sorghum.<\/p>\n

She is analysing whether one of these proteins \u2013 called sorghum metallothionein 4 \u2013 is present in the edible\u00a0grains and whether it can be used to increase zinc content.<\/p>\n

Attempts to boost zinc in grain crops often hit a stumbling block. Many of the substances that bind to zinc in plants also bind to cadmium, which is toxic to humans. It means that crops can suck up this harmful metal from the soil together with the useful zinc. But Dr Mierek-Adamska believes sorghum metallothionein 4 is more picky about what it binds to.<\/p>\n

\u2018The metallothionein I am working with seems to have this ability to distinguish between zinc and cadmium in the laboratory,\u2019 she said. \u2018We now have to test whether this happens in the plants too.\u2019<\/p>\n

2,000 proteins<\/strong><\/p>\n

Zinc plays a role in 2,000 human proteins \u2013 a tenth of those produced by our bodies \u2013 including some that play a key role in the proper functioning of DNA in our cells. People from low-income areas are particularly vulnerable to deficiency as zinc-rich foods like meat tend to be expensive.<\/p>\n

But even in wealthy European countries, zinc deficiency is considered to be common. One study in 2015 found that 86% of girls aged between 4-10-years-old in Germany<\/a> had intakes of zinc that were below the estimated average requirement, while 95% of girls in France of the same age were not getting adequate zinc.<\/p>\n

Dr Mierek-Adamska is currently growing sorghum plants in soil that contains different levels of cadmium and zinc to see whether this selectivity of metallothionein 4 is maintained. In the future, she hopes her work will lead to the creation of genetically modified sorghum that will carry increased amounts of metallothionein 4 to see if this can fortify the crop with zinc.<\/p>\n

\u2018Hopefully we will get to a point where we have new varieties of sorghum that have zinc in a nice form that humans can digest,\u2019 said Dr Mierek-Adamska.<\/p>\n

But modifying plants so the micronutrients they contain are more readily available when they are eaten is only half of the battle as the micronutrients have to exist in the soil in the first place for plants to absorb them. In many areas, soils have been depleted by centuries of farming and erosion, meaning they need to be supplemented with fertiliser.<\/p>\n

Engineers at agronomy consultants Zemdirbiu Konsultacijos, based in Kaunas, Lithuania, have been developing an innovative monitoring device to determine whether cereal crops like wheat have the right balance of micronutrients in their soil.<\/p>\n

They use a technique called spectrophotometry, which is able to determine the concentration of different chemical substances in a liquid by shining a beam of light through it. Different chemicals absorb different wavelengths of light, so by looking at what light is lost as it passes through the liquid, it is possible to calculate the concentration of those substances.<\/p>\n

While the leaves of plants are not strictly a liquid, they do contain liquid in their cells. So Zemdirbiu Konsultacijos claim that it is possible to measure the concentration of different nutrients and micronutrients in a plant by shining light through the leaves.<\/p>\n

They are developing a handheld \u2018Smart Agrometer<\/a>\u2019 that uses this technique so farmers can measure the health and nutrient content of their crops in the field.<\/p>\n

\u2018Most farmers judge the amount of fertiliser they use by eye and experience,\u2019 said Kipras Kazlauskas, head of business development at Zemdirbiu Konsultacijos, which is leading the Spectrophotometer<\/a> project to build the mobile-phone sized agrometer.<\/p>\n

\u2018If they can have information about exactly what nutrients a plant needs, it can help them adjust their fertilising schedule and pick the right fertiliser for the job.\u2019<\/p>\n

Currently the device is still about the size of a suitcase and connects to a laptop, making it hard to carry around, but the team hope to shrink it so it becomes handheld and can deliver information directly to an app on the farmer\u2019s mobile phone.<\/p>\n

The device works by comparing the spectrum of light passing through leaves on the plant to a database that shows what that crop growing in ideal conditions and with the right balance of nutrients should look like. This can then help the farmer tweak the nutrients given to the plants.<\/p>\n

Although the team are still to publish data that shows how effective the device is, they believe it could be used to help address micronutrient deficiencies in people\u2019s diets.<\/p>\n

\u2018It could not only bring down the cost of food by reducing fertiliser use but also help farmers ensure their crops have the right balance of nutrients that consumers need,\u201d said Kazlauskas.<\/p>\n

The research in this article was funded by the EU. If you liked this article, please consider sharing it on social media.
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Originally published by Horizon<\/a><\/p>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Boosting the levels of micronutrients like zinc in popular grain crops could help to reduce a \u2018hidden hunger\u2019 experienced by millions of people across Europe and around the world. More than two billion children and adults globally are estimated to suffer from deficiencies of crucial vitamins and minerals due to poor diet. Unlike undernourishment \u2013 … Read more<\/a><\/p>\n","protected":false},"author":322,"featured_media":797,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"generate_page_header":"","jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[12],"tags":[263,264,256],"class_list":["post-796","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-health","tag-may19","tag-nutrition","tag-rea"],"yoast_head":"\nBoosting nutrients in crops to beat \u2018hidden hunger\u2019 of poor diet - Horizon Magazine Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/scienceblog.com\/horizon\/796\/boosting-nutrients-in-crops-to-beat-hidden-hunger-of-poor-diet\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Boosting nutrients in crops to beat \u2018hidden hunger\u2019 of poor diet\" \/>\n<meta property=\"og:description\" content=\"Boosting the levels of micronutrients like zinc in popular grain crops could help to reduce a \u2018hidden hunger\u2019 experienced by millions of people across Europe and around the world. 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Wheat makes up nearly\u00a0half of all cereals grown in\u2026","rel":"","context":"In "Earth, Energy & Environment"","block_context":{"text":"Earth, Energy & Environment","link":"https:\/\/scienceblog.com\/horizon\/category\/earth-energy-environment\/"},"img":{"alt_text":"Minor cereals such as einkorn can add to the diversity of our food production.","src":"https:\/\/i0.wp.com\/scienceblog.com\/horizon\/wp-content\/uploads\/sites\/4\/2019\/05\/einkorn-589213_1920.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/scienceblog.com\/horizon\/wp-content\/uploads\/sites\/4\/2019\/05\/einkorn-589213_1920.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/scienceblog.com\/horizon\/wp-content\/uploads\/sites\/4\/2019\/05\/einkorn-589213_1920.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/scienceblog.com\/horizon\/wp-content\/uploads\/sites\/4\/2019\/05\/einkorn-589213_1920.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/scienceblog.com\/horizon\/wp-content\/uploads\/sites\/4\/2019\/05\/einkorn-589213_1920.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/scienceblog.com\/horizon\/wp-content\/uploads\/sites\/4\/2019\/05\/einkorn-589213_1920.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":3010,"url":"https:\/\/scienceblog.com\/horizon\/3010\/sowing-the-seeds-of-greater-food-diversity-in-africa\/","url_meta":{"origin":796,"position":2},"title":"Sowing the seeds of greater food diversity in Africa","author":"Horizon Magazine","date":"March 26, 2025","format":false,"excerpt":"Diversifying food sources and developing underused, nutrient-rich crops could help combat malnutrition and enhance food security in Africa. 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