Dictionary > Pneumatophore

Pneumatophore

Definition
noun, plural: pneumatophores
(botany) A specialized aerial root, such as in certain mangrove species, that stick up out of the soil and covered with many lenticels for gaseous exchange
(zoology) The air sac or float in certain siphonophores
Supplement
In botany, pneumatophores are a type of aerial root. Aerial roots are roots that grow from above the ground and absorb water directly from the air. Pneumatophores are formed by certain plant species submerged in water, in waterlogged soil, or in strongly compacted soil. They emerge from the typical roots and then stick up out of the soil. The root surface of the pneumatophores is covered with lenticels, i.e. raised pores allowing gas exchange between the atmosphere and the internal tissues. The lenticels take up air into the spongy tissue of the pneumatophore. The oxygen is then spread throughout the plant. Examples of plant species that form pneumatophores are the black mangrove and the grey mangrove. These mangrove plants form pneumatophores since the saline soil is anaerobic and therefore hampers the submerged roots to carry out gas exchange through the soil.
In zoology, a pneumatophore is one of the three major body parts in a colony of siphonophores. The other two body parts are the nectosome and the syphosome. The pneumatophore serves as an air sac or float that aids the colony to stay afloat at the proper level in the ocean. It is located at the top of the colony.
Word origin: pneumat– (“air” or “gas”) + –phore (“bearer”)
See also:


You will also like...

Cell Respiration
Cell Respiration

Cell respiration is the process of creating ATP. It is "respiration" because it utilizes oxygen. Know the different stag..

Growth Patterns
Growth Patterns

This tutorial describes the sigmoid curve, annual plant growth, tree growth, human growth, and insect growth as the grow..

Biological Energy
ATP & ADP – Biological Energy

ATP is the energy source that is typically used by an organism in its daily activities. The name is based on its structu..

An artistic depiction of Dunkleosteus fish
Fish

The sea was teeming with life. Eventually, through reproduction and continued variation, fish came about. There are over..

Community Patterns

Learn about community patterns and the ecological factors influencing these patterns. Revisit some of the ecosystems you..

Endemic Flora of New Zealand
New Zealand’s Unique Flora

If New Zealand has lots of unique animals, it's also got a whole lot of unique plants. Find out more about some of them,..