Why do Mangrove trees develop aerial roots?
how plants cope in the mangroves: breathing roots. An aerial root may be defined as a root which, for part of the day at least, is exposed to the air. The mangrove mud is rather anaerobic (oxygen poor) and unstable and different plants have root adaptations to cope with these conditions.
Physical support is a primary function of plant roots, and aerial roots are no exception. Climbing orchids, such as vanilla (Vanilla planifolia), use adventitious aerial roots to climb other plants and compete for light, while their terrestrial roots remain in the ground.
- Like most plants, orchids are able to reproduce themselves in two different ways; the one way sexually by seed, and the other asexually by vegetative propagation. Vegetative propagation can be accomplished in three ways; that is, by division, back bulbs and offshoots.
- In botany. In botany, stolons are stems which grow at the soil surface or just below ground that form adventitious roots at the nodes, and new plants from the buds. Stolons are often called runners.
- contractile root Any of the modified adventitious roots that develop from the base of the stem of a bulb or corm. The new bulb or corm develops at a higher level in the soil than the old one. The contractile roots shorten and pull it down to a suitable level. "contractile root." A Dictionary of Biology. .
Aerial roots are a type of adventitious root, and they grow from the plant stem or leaf tissues. They are usually found in climbing vines, epiphytes (like orchids), and hemiepiphytes (like strangler figs and banyan trees).
- Cells in the leaves get plenty of oxygen from photosynthesis, but cells in the roots often need to get oxygen from the environment to stay alive. Even though roots are buried, they can absorb oxygen from the small air spaces in soil. This is why it's possible to 'drown' plants by watering them too much.
- prop root Any of the modified roots that arise from the stem of certain plants and provide extra support. Such stems are usually tall and slender and the prop roots develop at successively higher levels as the stem elongates, as in the maize plant.
- stilt roots. Stilt roots also called prop roots are developed by Rhizophora species and Pandanus species. Stilt roots outgrow the trunk of the mangrove, branches or already existing stilt roots. The arc-shaped prop roots often can be found with a huge amount of lenticels that allow gas exchange in the oxygen-poor soils
Updated: 20th September 2018