
Gleadow's team tested cassava and sorghum under a series of climate change scenarios, with particular focus on different CO2 levels, to study the effect on plant nutritional quality and yield. Both species belong to a group of plants that produce chemicals called cyanogenic glycosides, which break down to release poisonous cyanide gas if the leaves are crushed or chewed.
Around 10 percent of all plants and 60 percent of crop species produce cyanogenic …Current levels in the air are just under 390 ppm, around the highest in at least 800,000 years and up by about a third since the start of the Industrial Revolution.
"What we found was the amount of cyanide relative to the amount of protein increases," Gleadow told Reuters from Glasgow, referring to cassava. At double current CO2 levels, the level of toxin was much higher while protein levels fell….
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