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Freshly dug sweet potato plants with tubers Hemerocallis tuber roots. A root tuber, tuberous root or storage root is a modified lateral root, enlarged to function as a storage organ. The enlarged area of the tuber can be produced at the end or middle of a root or involve the entire root.
Its root can attain lengths up to 2 m (6 + 1 ⁄ 2 ft) and weigh up to 20 kilograms (44 pounds). The heaviest jícama root ever recorded weighed 23 kg (51 lb) and was found in 2010 in the Philippines. [4] Jícama is frost-tender and requires nine months without frost for a good harvest of large tubers or to grow it commercially.
The juice extracted from tuber is used as a tonic and also used for the treatment of pyorrhea (inflammation of the gum and teeth). Root paste is externally applied as a poultice on cuts and wounds and extract is given in intestinal disorders. The term hatta haddi means a root (jadi) resembling a hand (hatta or hath).
The plant has high-climbing, thorny vines. The underground part is a tuber — a swollen, food-storage stem, much like an Irish potato.
Tubers develop from either the stem or the root. Stem tubers grow from rhizomes or runners that swell from storing nutrients while root tubers propagate from roots that are modified to store nutrients and get too large and produce a new plant. [22] Examples of stem tubers are potatoes and yams and examples of root tubers are sweet potatoes and ...
In some species (e.g. Cyclamen coum) roots come from the bottom of the tuber, suggesting that it is a stem tuber; in others (e.g. Cyclamen hederifolium) roots come largely from the top of the tuber, suggesting that it is a root tuber. [6] As an example of a combination, juno irises have both bulbs and storage roots. [7]
Roots and leaves contain two cyanogenic glycosides, linamarin and lotaustralin. These are decomposed by linamarase, a naturally occurring enzyme in cassava, liberating hydrogen cyanide. [17] Cassava varieties are often categorized as either sweet or bitter, respectively signifying the absence or presence of toxic levels of cyanogenic glycosides.
Cyperus rotundus is a perennial plant, that may reach a height of up to 140 cm (55 in).The names "nut grass" and "nut sedge" – shared with the related species Cyperus esculentus – are derived from its tubers, that somewhat resemble nuts, although botanically they have nothing to do with nuts.