Search results
Results From The WOW.Com Content Network
In botany, pneumatodes are air-containing structures in plant roots. [1] Their function is to allow gaseous exchange in root tissues. This can be beneficial to semi-aquatic plants, such as neo-tropical palms. [2]
Pneumatophores of mangrove plant Pneumatophores differentiate the black mangrove and grey mangrove from other mangrove species. Fishers in some areas of Southeast Asia make corks for fishing nets by shaping the pneumatophores of mangrove apples ( Sonneratia caseolaris ) into small floats.
Aerating roots (or knee root or knee or pneumatophores): roots rising above the ground, especially above water such as in some mangrove genera (Avicennia, Sonneratia). In some plants like Avicennia the erect roots have a large number of breathing pores for exchange of gases.
Vertical roots called pneumatophores project from the mud, thus the term "pencil roots". These are used in gas exchange as very little oxygen is available in the mud. The flowers are fragrant and rich in nectar, and are pollinated by insects. The embryos exhibit cryptovivipary, a process where they start to develop before the seed is shed, but ...
They function to help the colonies maintain their orientation in water. [6] In the Cystonectae subgroup, the pneumatophores have an additional function of assisting with flotation of the organisms. [6] The siphonophores exhibiting the feature develop the structure in early larval development via invaginations of the flattened planula structure. [6]
The inner tissue of respiratory roots is full of hollow, airy, tube-like dead cells, giving it a spongy texture. The outer surface of pneumatophores contains tiny pores or openings, which are called pneumathodes: e.g., Heritiera fomes, Rhizophora mucronata. Pneumatophores can be unbranched or sparingly branched.
Heritiera fomes is a medium-sized evergreen tree growing to a height of 15 to 25 metres (49 to 82 ft). The roots are shallow and spreading and send up pneumatophores.The trunk develops buttresses and is grey with vertically fissured bark.
Aerenchyma in stem cross section of a typical wetland plant. Aerenchyma or aeriferous parenchyma [1] or lacunae, is a modification of the parenchyma to form a spongy tissue that creates spaces or air channels in the leaves, stems and roots of some plants, which allows exchange of gases between the shoot and the root. [2]