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Cass Meharg Photography added 6 new photos to the album: This site uses cookies from Google and other third parties to deliver its services, to personalise adverts and to analyse traffic. Published by the Royal Society of Chemistry. With the green shoots of rice plants brushing against their rubber boots, rice farmers along the Colorado River in Texas waded back out into flooded fields last year for the first time since To answer that, we need to understand a few things about how rice is grown. Email or Phone Password Forgot account?

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Scientist growing Thale Cress for genetic analysis Source: Arsenite, the form more common in flooded fields, does something similar, sneaking into plant cells by subverting silicon transporters. In Decemberthey published a paper describing a new arsenate reductase enzyme, which they named HAC for high arsenic content 1. Only registered users can comment on this article.

If such a thing exists. They had combed the plant genome for sequences matching that of known yeast enzyme that reduces arsenate to arsenite — a good strategy, notes Salt — leading them to arsenate reductases in plants including rice.

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Site powered by Webvision. Last year, Salt and his colleagues showed two rice genes very similar in sequence to HAC1 could give bacteria back the ability to reduce arsenate if their own arsenate reductases were not functioning. According to a recent study that Meharg was involved in, three quarters of rice products, from a sample of 29 rice crackers, 31 rice cereals and 13 baby rices marketed for children in the UK, contained inorganic arsenic at levels above the 0.

To kill the beetles that fed on the cotton plants, farmers sprayed them with pesticides — pesticides containing arsenic, which now contaminates the soil and water, finding its way into the roots of thirsty rice plants and, therefore, the food chain. This site uses cookies from Google and other third parties to deliver its services, to personalise adverts and to analyse traffic.

Hayley Bennett looks at some of its weird, wacky — and wise — incarnations. Unlike the bacteria, plants that lacked functioning HAC1 proteins were still capable of reducing arsenate, meaning alternative reducing mechanisms must be at play, besides other plant processes involved in the uptake of arsenic.

Cass Meharg Photography added 7 new photos to the album: Then we measured the arsenic levels in those plants and asked the statistical question: InSalt had collaborated with Meharg on the publication of an additional genome wide association study — in rice cultivars grown at four different field sites. Cass Meharg Photography added 4 new photos to the album: To answer that, we need to understand a few things about how rice is grown.

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I hate to say it, my little boy is growing up. Sections of this page. When you feed plants arsenate and then you look into the roots and the natue, you find that all the arsenate is now mysteriously arsenite.

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Cass Meharg Photography updated their profile picture. Next they tried genome wide association mapping: Also I want to thank everyone who likes and supports my page and my passion.

Have your say You’re not signed in. One possibility is applying fertilisers containing silicic acid, which cross-competes with arsenite for silicon transporters, thereby partially blocking its entry route. It takes less than a minute and it’s completely free. To link your comment to your profile, sign in now. So, As my return to the page I want to share this absolutely amazing picture i found at my grandmothers place of my grandfather as a youngin.

Arsenic and rice – a growing problem? | Feature | Chemistry World

Following years of drought, the river authority had finally released the water farmers so desperately needed for irrigation. Cass Meharg Photography added naturd new photos to the album: Skip to main content Skip to navigation Create your free account Registration is free, quick and easy.

Which begs the question: Turns out the concentrations were the same as they are today. The arsenic issue is more urgent for babies because they eat three times emharg much as adults do on a by-bodyweight basis.