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Potatoes that have turned green due to increased chlorophyll and photosynthesis are indicative of increased light exposure and are therefore associated with high levels of solanine. [20] Synthesis of solanine is also stimulated by mechanical injury because glycoalkaloids are synthesized at cut surfaces of potatoes. [ 18 ]
The genus name Phytophthora comes from the Greek φυτό (phyto), meaning "plant" – plus the Greek φθορά (phthora), meaning "decay, ruin, perish".The species name infestans is the present participle of the Latin verb infestare, meaning "attacking, destroying", from which the word "to infest" is derived.
Lenape potatoes collected from around Canada were found to contain over 16–35 mg of glycoalkaloids per 100 g of fresh potato compared to 3–18 mg in other varieties. [4] Samples grown at 39 locations around the US had an average of 29 mg per 100 g of potato but ranged from 16–65 mg compared to an average of 8 mg for five other varieties. [ 6 ]
When potatoes are exposed to direct sunlight, they naturally start to turn green. Are green potatoes safe to eat? According to experts, the answer is no. The post Can You Eat Green Potatoes ...
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Like the tomato and the nightshades, the potato is in the genus Solanum; the aerial parts of the potato contain the toxin solanine. Normal potato tubers that have been grown and stored properly produce glycoalkaloids in negligible amounts, but, if sprouts and potato skins are exposed to light, tubers can become toxic.
However, when these commercial varieties turn green, even they can approach solanine concentrations of 1000 mg/kg (1000 ppmw). The U.S. National Toxicology Program suggests that the average American consume no more than 12.5 mg/day of solanine from potatoes (the toxic dose is several times this, depending on body weight). Vitis spp. grape: Vitaceae
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