Why Xanthophyta are called yellow-green algae?
Why Xanthophyta are called yellow-green algae?
Xanthophyceae is a class comprised of xanthophytes or the yellow-green algae. The color is due to the presence of pigments such as xanthophylls and beta carotene. They also have chlorophyll pigments.
Which pigment contains Xanthophyta?
Yellow-green colour pigment is found in xanthophyta. These are traditionally known as yellow-green algae, that possess carotenoid pigments (including xanthins), which are responsible for their colour, in addition to chlorophylls.
What are the economic importance of algae?
Algae are economically important in a variety of ways. The natural substance can be used as a food source, a fodder, in fish farming, and as a fertilizer. It also plays a key role in alkaline reclaiming, can be used as a soil binding agent, and is used in a variety of commercial products.
How does chlorophyta help the environment?
Sea life and humans can use green algae for food They grow primarily in freshwater and saltwater, although some are found on land. Chlorophyta convert sunlight to starch that is stored in cells as a food reserve.
Which type of thallus organization is present in Xanthophyceae?
siphonal organization
The most common and best known xanthophytes have siphonal organization, characterized by globose (Botrydium) or tubular (Vaucheria) thalli, where numerous nuclei and chloroplasts are dispersed in the protoplast and not separated by cell walls.
What are the characteristics of Chrysophyta?
Important characteristics of Chrysophytes are :
- Two unequal flagella.
- Golden yellow colour due to accessory pigment.
- Cell walls made of cellulose and silica.
- Free swimming.
- Unicellular.
- Present in water bodies with low calcium levels.
What are the characteristics of Xanthophyceae?
The following points highlight the nine main characteristics of Xanthophyceae. 1. Members of Xanthophyceae are commonly fresh water (Tribonema) and most of them are free floating. [Few members are found to grow on mud (Botrydium) and also on walls or tree trunks (Characiopsis, Ophiocytium etc.).
Why are xanthophytes easily mistaken for green algae?
Because the dominant pigment is chlorophyll a, the xanthophytes can easily be mistaken for green algae. The reserve polysaccharide is chrysolaminarin The cell wall is cellulose, impregnated with silica Cysts, if present, are formed from silica, but are in two overlapping halves
What is the classification of yellow green algae?
The Xanthophyta or Heterokontae are commonly known as yellow-green algae include only one class Xanthophyceae. This division has close relationship with the Ghlorophyta comprising both marine and fresh-water forms. Certain species grow on drying mud, on trunk of trees, on damp walls, and similar other habitat.
What are Xanthophyte cell walls made of?
Xanthophyte cell walls are produced of cellulose and hemicellulose. They appear to be the closest relatives of the brown algae . The species now placed in the Xanthophyceae were formerly included in the Chlorophyceae.
