occurrence in angiospermsMany primary root and adventitious root systems have become modified for special functions, the most common being the formation of tuberous (fleshy) roots for food storage. For example, carrots and beets are tuberous roots that are modified from taproots, and cassava (manioc) is a tuberous root that is modified from an adventitious root. (Tubers, on the other hand, are modified, fleshy,......The common potato ( Solanum tuberosum) forms such tubers. The much-reduced scale leaves and their associated axillary buds form the eyes of the potato. Tubers should not be confused with tuberous roots. Tubers are modified shoots, whereas tuberous roots are modified roots. The common feature, and hence the similar names, derives from the fleshy nature of both organs. Tubers and...
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