Pictured Key to some common filamentous red algae of.
In this article we will discuss about:- 1. Occurrence of Polysiphonia 2.Plant Body of Polysiphonia 3.Cell Structure 4. Features 5. Reproduction 6. Life Cycle. Occurrence of Polysiphonia:. The genus Polysiphonia (Gr. poly — many; siphon — tube) is represented by more than 150 species, out of which about 16 species are reported from India.
Polysiphonia variegata is found in polluted waters near the estuaries of sea. Some species are very commonly found on the roots of mangrove vegetation. Structure: ADVERTISEMENTS: Polysiphonia varies in colour from red to purple. This colour is because of the over masking pigment r-Phycoeythrin. In addition to this pigment chlorophyll a, p-carotene, xanthophylls and r-phycocyanins are also.
Occurrence Polysiphonia is a marine alga. It is present along the coast of oceans. It is attached to the rocks or other substratum. Some members are epiphytes. General structure Vegetative structure Plan body is composed of branched filamentous and basal attachment disc. Attachment discs: The basal attachment disc is formed of several non septate, branched.
Polysiphonia nigrescens is easily seen, also in winter, on stones at low tide. The sexual reproduction of Polysiphonia is a complicated process, but we will describe it here because the several phases can be seen very easily in living material. We start the story with the so-called tetrasporophyte. That is a small Polysiphonia plant with the normal amount of chromosomes (2n), that is forming.
Polysiphonia definition is - a large genus of red algae (family Rhodomelaceae) having usually a filamentous much-branched thallus variable in shape and size but in cross section showing a single axial cell surrounded by a sheath of tubular cells at least in the axis and main branches.
Two species of the genus Polysiphonia Greville (Ceramiales, Rhodophyta) collected from Setse and Kyaikkhami coastal areas of Mon State, from June 2011 to March 2015, were identified as P. subtilissima Montagne and uncertain species as P. sp.1, mainly based on morphology of vegetative and reproductive structures. The plants are widely distributed in estuaries and salt marshes attached to.
Abstract A small species of Polysiphonia Greville collected in the northern Thyrrenian Sea is described. Specimens have been tentatively referred to Polysiphonia pseudovillum, species unknown from the Mediterranean Sea, on the basis of the correspondence existing between their morphological and taxonomical characters. The importance of some of these characters for the identification of.