<Li> Potatoes (mainly Russets) are commonly used in plant research . The consistent parenchyma tissue, the clonal nature of the plant and the low metabolic activity provide a very nice "model tissue" for experimentation . Wound - response studies are often done on potato tuber tissue, as are electron transport experiments . In this respect, potato tuber tissue is similar to Drosophila melanogaster, Caenorhabditis elegans and Escherichia coli: they are all "standard" research organisms . </Li> <Li> Potatoes have been delivered with personalized messages as a novelty . Potato delivery services include Potato Parcel and Mail A Spud . </Li> <P> Peruvian cuisine naturally contains the potato as a primary ingredient in many dishes, as around 3,000 varieties of this tuber are grown there . Some of the more notable dishes include boiled potato as a base for several dishes or with ají - based sauces like in Papa a la Huancaína or ocopa, diced potato for its use in soups like in cau cau, or in Carapulca with dried potato (papa seca). Smashed condimented potato is used in causa Limeña and papa rellena . French - fried potatoes are a typical ingredient in Peruvian stir - fries, including the classic dish lomo saltado . </P> <P> Chuño is a freeze - dried potato product traditionally made by Quechua and Aymara communities of Peru and Bolivia, and is known in various countries of South America, including Peru, Bolivia, Argentina, and Chile . In Chile's Chiloé Archipelago, potatoes are the main ingredient of many dishes, including milcaos, chapaleles, curanto and chochoca . In Ecuador, the potato, as well as being a staple with most dishes, is featured in the hearty locro de papas, a thick soup of potato, squash, and cheese . </P>

How many different types of potatoes in peru