FRITSCHIELLA

CLASSIFICATION OF FRITSCHIELLA​

Sub-division :- Algae

Class :- Chlorophyceae

Order :-  Chaetophorales

Family :-  Chaetophoraceae

Genus :- Fritschiella

THALLUS OF FRITSCHIELLA​

• COMMENTS :-
• Thallus is filamentous. The filaments show heterotrichous habit.
• Thallus show typical heterotrichous nature with distinct rhizoidal system, the prostrate system, primary projecting system and the secondary projecting system.
• The rhizoidal system consists of one or more rhizoid-like outgrowths. These arise from prostrate system.
• The prostrate system is made of clusters of cells. These cells are either rounded or irregular in shape. The plants with well developed prostrate system consist of mature filaments.
• The primary projecting system arises from the prostrate system and is aerial in nature. The filaments are uniseriate or biseriate which may -be branched or unbranched. The cells of these filaments are small and rounded. They are green and photosynthetic. 
• The secondary projecting system consists of freely branched uniseriate filaments. The cells are elongated. The end cells of the branches terminate into hair-like structures.
• The cells of the projecting system are thin walled. These are uninucleate with a curved plate-like chloroplast that has 2-8 pyrenoids. The cells of primary projecting system and the prostrate system have poorly developed chloroplasts. In rhizoidal system, chloroplasts are completely absent.

IDENTIFICATION

1. Sub-division– Algae
   1. Presence of a simple thallus.
   2. Chlorophyll present
   3. Cell wall made of cellulose.
2. Class – Chlorophyceae
   1. Presence of a definite nucleus
   2. Chloroplast present. grass green colour
   3. Presence of starch
   4. Reproductive structure motile and flagella equal in length.
3. Order –  Chaetophorales
   1. Plant body heterotrichous
   2. Distinct prostrate and erect systems present.
4. Family – Chaetophoraceae
   1. Plants filamentous
   2. Terminal or lateral hairs present
   3. Cells with single chloroplast.
5. Genus – Fristchiella
   1.  Plant body filamentous,
   2. Chloroplast curved and plate-like
   3. Secondary projecting system composed of tuft of elongated branches with longer cells.

REFERENCES

• https://en.wikipedia.org/wiki/Fritschiella
• http://fmp.conncoll.edu/silicasecchidisk/chiella_Main.html