Pneumatophore


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

pneumatophore

[′nü·məd·ə‚fȯr]
(botany)
An air bladder in marsh plants.
A submerged or exposed erect root that functions in the respiration of certain marsh plants.
(invertebrate zoology)
The air sac of a siphonophore.

Pneumatophore

 

the organ of hydrostatic equilibrium in the colonial Siphonophora. The pneumatophore is located on the upper end of the common trunk of the colony. Its cavity is divided into air-bearing and glandular areas. The cells of the glandular area excrete a gas that is similar in composition to air.


Pneumatophore

 

a terrestrial ventilative or respiratory root of some tropical woody plants. Pneumatophores characterize many trees that form mangrove forests, some palms, and the American bald cypress. Such plants grow on swampy soils with a poor oxygen content or along seashores that are flooded when the tide is in. Pneumatophores develop from subterranean roots or rhizomes and grow vertically, rising above the water or soil. Their biological significance is mainly their supply of air to subterranean organs. This is promoted by the anatomic structure of pneumatophores: their thin bark, numerous lenticels, and system of air-bearing intercellular spaces. An abundance of intercellular space often is responsible for the white color of pneumatophores. Plants that usually have pneumatophores do not form them when grown on soils that are not swampy. Thus, pneumatophores are absent in the bald cypress that is raised as an ornamental on the southern coast of the Crimea, in the Caucasus, and in Middle Asia.

References in periodicals archive ?
Heights and diameters of pneumatophores as well as seedling heights were measured in a 1 x 1m subplots located in the middle of each larger plot.
marina and other verbenaceous plants, and Sonneratia alba and other sonneratacean plants), have typical pneumatophores and can live on substrates of medium stability.
Summary of mixed-model ANOVAs testing for effects of substrate treatment (pneumatophore, pneumatophore + shell, and pneumatophore + oyster) and tidal elevation (low, mid, and high) on the abundance of new (shell height, <1.0 mm) Saccostrea glomerata recruits in the mangrove forest.
It is very unobtrusive amongst the tangles of roots and pneumatophores but seems to be doing well.
In vitro, antibacterial comparative study between the pneumatophores of Xylocarpus moluccensis and H.
Plant growth promoting of endophytic Bacillus cereus isolated from the Pneumatophores of Avicennia marina.
Avicennia pneumatophores were more abundant near water channels and more humid areas.
The mangrove may be directly exposed or poisoned via adsorption of the toxic soluble fractions of PAHs through the pneumatophores and prop roots.
The most amazing are pneumatophores, or breathing roots, reason enough to visit.
Buttresses or stilt roots are absent in the tree; pneumatophores can be 50-90 cm high and 7 cm in diameter.
and be tripped by the pneumatophores (erect roots), an adaptation to the tidal nature of this forest type.
(238) In India, the pneumatophores of grey mangroves