Write about structure of phaeophyceae.
Answers
Other name of phaeophyceae is brown algae. They are also called as kelp of sea weeds. Are seen in marine water mostly.
Some points on structure of phaeophyceae are as follows:-
1. Multicellular filamentous structure is found in the brown algae.
2. Macrocystis is the largest brown algae till now.
3. The possible length of brown algae may be up to about 100 meter.
4. Stalk will be present in the substratum.
5. Brown algae is also called as leafy algae due to the presence of lamina.
Explanation:
A phylum of algae in which the green chlorophyll pigments are usually masked by the brown pigment fucoxanthin. Brown algae are usually marine (being abundant in cold water) and many species, such as the wracks (Fucus), inhabit intertidal zones. They vary in size from small branched filaments to ribbon-like bodies (known as kelps) many metres long.
Phaeophyceae has a multicellular filamentous cells whose cell walls are composed of cellulose. The cellulose of the cell wall is stiffened by calcium alginate and a mucilaginous substance forms the amorphous part of the wall. A typical heterokont eyespot is present in most, but a few species lack this eyespot.