Question

What are the orders of class Myxophyceae?

Answer 1

Hint: Algae are a primitive group of algae that includes 150 genera and approximately 2,500 species. The division is represented in India by 98 genera and approximately 833 species. Members of the Myxophyceae (Cyanophyceae) class are commonly referred to as blue-green algae. The presence of the dominant pigment c-phycocyanin, the blue-green pigment, gives rise to the name blue-green algae.

Complete answer:
The order is a taxonomic rank used in the classification of organisms and recognized by nomenclature codes in biological classification. In descending order, the well-known ranks are life, domain, kingdom, phylum, class, order, family, genus, and species, with order falling between class and family. Superorder, the immediately higher rank, is sometimes added directly above order, with suborder beneath order. a taxonomic unit in the rank of order (plural taxa) (e.g. Strigiformes, Rosales). Orders are the plural in this case (Latin ordines). There are 150 genera and 1500 species in the Myxophyceae class.

There are five orders in the class. –
i) Chroococcales: Chroococcales are unicellular or colonial cyanobacteria that multiply through cell division and endospores. Ex: Chroococcus
ii) Chamaesiphonales: Chamaesiphonales, for example, are made up of unicellular or colonial epiphytes or lithophytes that multiply by producing endo or exospores. Chamaesiphon is an example.
iii) Pleurocapsales: including heterotrichous and filamentous types without heterocysts; endospore multiplier. Pleurocapsa
iv) Nostocales: Nostocales are composed of non-heterotrichous filamentous types with heterocysts, multiplying by hormogonia and akinetes or forming cysts. Nostoc, Anabaena are two examples.
v) Stigonematales: Stigonematales have heterotrichous filaments with true branches, whereas trichomes have many rows of cells with pit connections. Westiella is an example.

Note: Some filamentous Myxophyceae species have the capacity to move on their own. The movement might be caused by the filament gliding forward or backwards, spiral progression or retrogression, or a gradual waving of the filament's terminal section. Various environmental variables, such as temperature, light, and so on, have a significant impact on this. Movement is accelerated by increased light and a steady rise in temperature from 0° to 30°C.