Types of root

Roots are of two basic types depending on their origin. In the tap root system, found typically in dicotyledons, the primary root is a direct continuation of the radicle; it persists, keeps growing, and becomes the plant's main root, giving off branching lateral roots which, together with their further branches, are called secondary roots. In the adventitious root system the roots develop from a part of the plant other than the radicle - from the base of the stem, from nodes or from internodes (e.g. Monstera deliciosa, Ficus benghalensis, Piper nigrum). In most monocots the short-lived primary root of the seedling is soon replaced by numerous thread-like adventitious roots of similar size arising from various parts of the plant body; this tuft is called the fibrous root system and is typical of grasses (e.g. Oryza sativa, Eleusine coracana, Pennisetum americanum). Roots perform two categories of functions: primary functions - absorbing water and minerals from the soil and anchoring the plant firmly - common to almost al …