Pneumatophore


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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 ?
As black mangroves become more abundant in the northern GOM, their pneumatophores may provide more protection from predators than Spartina stems, and therefore improve the refuge value of estuarine nursery habitat for fishery species, including penaeid shrimps.
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.
And there is a fossilized mangrove bed, a tangle of roots and pneumatophores frozen and aeons old, yet instantly recognizable.
3], method EtOAc, BuOH, aqueous residue, precipitate extracts of stem bark, and negative control (acetone, MeOH) MeOH extract Antihyperglycemic Lowering [11] of bark serum glucose level in hyperglycemic mice following of glucose loading Antinociceptive Acetic-acid- induced writhings in mice MeOH extract Anticancer In vitro cell of both activity viability and leaf and In vivo stem powder screening [13] assay against B16 mouse melanoma and EAC (ehrlich ascites carcinoma) in mice model chromatography TLC characterization (qualitative and quantitative DPPH assay), HPLC, 1H NMR, FTIR spectral analysis, and bioautography screening EtOH Comparative Minimum [54] extracts of antibacterial Inhibitory pneumatophores activity Concentration (MIC) method
The aerating prop roots of the mangrove plant (Rhizophora racemosa) above the ground or especially above water with its rich production of exudates, death and decay, are extensively interwoven in close physical proximity to the negatively orthogravitropic pneumatophores of Avicennia sp supplying air through the soft, spongy tissue to the roots and microorganisms in the anoxic region of the mud.
distinct; secondary roots branched; pneumatophores scattered;
The cypress knees area, technically called pneumatophores, are really upright growths from the roots, said to help support the trees while aerating the underwater root system.
Deciduous trees; pneumatophores normally present; leaves two-ranked on short shoots, alternate, linear to linear-lanceolate, flattened, 3-17 mm long; pollen cones globose in pendent axillary racemes or panicles; ovulate cones 20-50 mm in diameter, subglobose, 5-10 scales, valvate, thin and woody; seeds trigonous, wingless.
Each type of mangrove has developed a different solution to this problem, and some have adventitious breathing roots that hang from the aerial parts, while others grow breathing roots called pneumatophores, sticking up from the submerged roots.
Adaptations to waterlogging such as prop-roots, knee-roots, swollen lenticels, and pneumatophores were prominent.
Biomass of algae epiphytic on pneumatophores of the mangrove, Avicennia marina, in the St.