The potato is a starchy tuber of the plant Solanum tuberosum and is a root vegetable native to the Americas, with the plant itself being a perennial in the nightshade family Solanaceae.
Viroids are small single-stranded, circular RNAs that are infectious pathogens. Unlike viruses, they have no protein coating. All known viroids are inhabitants of angiosperms, and most cause diseases, whose respective economic importance to humans varies widely.
Solanum is a large and diverse genus of flowering plants, which include three food crops of high economic importance: the potato, the tomato and the eggplant. It also contains the nightshades and horse nettles, as well as numerous plants cultivated for their ornamental flowers and fruit.
Phytophthora infestans is an oomycete or water mold, a fungus-like microorganism that causes the serious potato and tomato disease known as late blight or potato blight. Early blight, caused by Alternaria solani, is also often called "potato blight". Late blight was a major culprit in the 1840s European, the 1845 - 1852 Irish, and the 1846 Highland potato famines. The organism can also infect some other members of the Solanaceae. The pathogen is favored by moist, cool environments: sporulation is optimal at 12–18 °C (54–64 °F) in water-saturated or nearly saturated environments, and zoospore production is favored at temperatures below 15 °C (59 °F). Lesion growth rates are typically optimal at a slightly warmer temperature range of 20 to 24 °C.
Solanine is a glycoalkaloid poison found in species of the nightshade family within the genus Solanum, such as the potato, the tomato, and the eggplant. It can occur naturally in any part of the plant, including the leaves, fruit, and tubers. Solanine has pesticidal properties, and it is one of the plant's natural defenses. Solanine was first isolated in 1820 from the berries of the European black nightshade, after which it was named. It belongs to the chemical family of saponins.
The potato spindle tuber viroid (PSTVd) was the first viroid to be identified. PSTVd is a small, single stranded circular RNA molecule closely related to the chrysanthemum stunt viroid. Present within the viroidal RNA is the Pospiviroid RY motif stem loop common to its genus. The natural hosts are potatoes and tomatoes. All potatoes and tomatoes are susceptible to PSTVd and there is no form of natural resistance. Natural infections have also been seen in avocados and infections in other solanaceous crops have been induced in the laboratory. Until 2017 PSTVd was thought to be unable to infect Solanum sisymbriifolium. Then in May seeds exported by a Dutch company were noticed to be infected. These seeds were shipped from the company, but had been originally bred to their specifications in two Asian countries.
The tomato is the edible berry of the plant Solanum lycopersicum, commonly known as a tomato plant. The species originated in western South America and Central America. The Nahuatl word tomatl gave rise to the Spanish word tomate, from which the English word tomato derived. Its domestication and use as a cultivated food may have originated with the indigenous peoples of Mexico. The Aztecs used tomatoes in their cooking at the time of the Spanish conquest of the Aztec Empire, and after the Spanish encountered the tomato for the first time after their contact with the Aztecs, they brought the plant to Europe, in a widespread transfer of plants known as the columbian exchange. From there, the tomato was introduced to other parts of the European-colonized world during the 16th century.
Potato virus Y (PVY) is a plant pathogenic virus of the family Potyviridae, and one of the most important plant viruses affecting potato production.
Solanum jamesii is a species of nightshade. Its range includes the southern United States. All parts of the plant, and especially the fruit, are toxic, containing solanine when it matures. The tubers were/are eaten raw or cooked by several Native American tribes, but they require leaching and boiling in clay in order to be rendered edible. The tubers are also extremely small when compared to familiar varieties of S. tuberosum.
Somatic fusion, also called protoplast fusion, is a type of genetic modification in plants by which two distinct species of plants are fused together to form a new hybrid plant with the characteristics of both, a somatic hybrid. Hybrids have been produced either between different varieties of the same species or between two different species.
The Atlantic potato is a mid-season chipping potato variety. It was developed and released by USDA Agricultural Research Service scientists at Beltsville, Maryland, in 1978. The variety is not under plant variety protection. It is a progeny of a cross between 'Wauseon' and 'Lenape'. It is widely grown for chipping directly off the field or with short-term storage. Marketable yields are fairly high.
Bintje is a middle-early ripening potato variety bred in the Netherlands by the Frisian schoolmaster K.L. de Vries in 1904 from and marketed for the first time in 1910. The name of the potato, a diminutive of Benedict, was borrowed from one of his former students.
Superior is a white-skinned, white-fleshed, mid-season potato variety. It was released by the University of Wisconsin potato breeding program in 1962, and is not under plant variety protection. It is a progeny of a cross between 'B96-56' and 'M59.44' and was first grown in 1951. 'B96-56' was also a parent of Kennebec. Like the potato variety Atlantic, Superior is widely grown for chipping right off the field and marketable yields are fairly high.
Climate change is predicted to have significant effects on global potato production. Like many crops, potatoes are likely to be affected by changes in atmospheric carbon dioxide, temperature and precipitation, as well as interactions between these factors. As well as affecting potatoes directly, climate change will also affect the distributions and populations of many potato diseases and pests. Potato is one of the world's most important food crops. Potato production must be adapted to climate change to avoid reductions in crop yields.
The Solanaceae, or nightshades, are a family of flowering plants that ranges from annual and perennial herbs to vines, lianas, epiphytes, shrubs, and trees, and includes a number of agricultural crops, medicinal plants, spices, weeds, and ornamentals. Many members of the family contain potent alkaloids, and some are highly toxic, but many—including tomatoes, potatoes, eggplant, bell and chili peppers—are used as food. The family belongs to the order Solanales, in the asterid group and class Magnoliopsida (dicotyledons). The Solanaceae consists of about 98 genera and some 2,700 species, with a great diversity of habitats, morphology and ecology.
Barbara Baker is an American plant molecular geneticist working at the University of California, Berkeley and the United States Department of Agriculture She was elected to the National Academy of Sciences in 2021.
Solanum acaule is a species of wild potato in the family Solanaceae, native to Peru, Bolivia, northern Chile, and northwestern Argentina. It is being extensively studied for its resistance to Phytophthora infestans, Potato leafroll virus, Potato virus X, Potato virus Y, potato cyst nematodes, and frost, in an effort to improve the domestic potato Solanum tuberosum.
Solanum commersonii is a species of wild potato in the family Solanaceae. It is native to southern Brazil, Uruguay, and northeastern Argentina, and has been introduced to Mauritius. It is being extensively studied for its resistance to root knot nematode, soft rot, blackleg, bacterial wilt, verticillium wilt, Potato virus X, tobacco etch virus, common scab, and late blight, and for its frost tolerance and ability to cold acclimate, in an effort to improve the domestic potato Solanum tuberosum.
Solanum demissum is a species of wild potato in the family Solanaceae, native to Mexico and Guatemala. It has been extensively used as a source of alleles for resistance to Phytophthora infestans, the cause of late potato blight, to improve the domestic potato Solanum tuberosum.
Solanum palustre is a species of wild potato in the family Solanaceae. It is native to central and southern Chile, and Neuquén and Río Negro Provinces of Argentina. Although it does not bear tubers, it is still being extensively studied for its resistance to Potato virus Y, Potato leafroll virus, early blight, late blight, common scab, bacterial soft rot, and frost.
