The functions of plant roots are:
Anchorage. The roots anchor the plant in place and prevent it from moving, being blown over or washed away by water.
Absorption of water and dissolved nutrients from the soil. Root hairs increase the surface area of the roots system as a whole and enable it to absorb large amounts of water from the soil.
Absorption of oxygen. Most of the oxygen required by the plant is actually absorbed from the soil and not directly from the atmosphere via the leaves and stoma. A lack of oxygen in the soil can cause the root system to degenerate and die - and the plant along with it. When plants are over-watered, the water replaces the pore spaces in the soil, creating anaerobic conditions, stunting or killing the plant.
Storage. Certain types of plants have roots which perform an additional function of storage (both water and food), for example the potato, yam, beetroot and Protoasparagus.
Roots also provide home or host sites for bacteria and fungi which can assist in the breakdown and assimilation of nutrients from the soil. For example nitrogen fixing bacteria which are found in the root nodules of most legumes.,
The purpose of holdfasts are to secure the algae in place, similar to how roots function, except they do not absorb nutrients like roots do.
Roots modified to perform some special function such as climbing or storage
Reproduction
Motor function, as opposed to the dorsal roots, which are primarily sensory.
The roots that take moisture out of the air for survival are called aerial roots. The roots are usually found above the ground so as to be able to perform their function.
the dandelion roots differ from roots of grass by different function
the roots will not function well.
the roots will not function well.
lized function the roots of turnip
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Physical support is a primary function of plant roots, and aerial roots are no exception. Climbing orchids, such as vanilla (Vanilla planifolia), use adventitious.
The purpose of holdfasts are to secure the algae in place, similar to how roots function, except they do not absorb nutrients like roots do.
Roots modified to perform some special function such as climbing or storage
....prop root....