Phycology جلبک شناسی

نخستین پایگاه اطلاعاتی جلبک شناسی به زبان فارسی

معرفی جنس Arthrospira

Arthrospira

 

 

General appearance of alga? Unbranched filaments; or Blue-green algae - cells without organelles.

 

Colour? yellow.

 

Habitat freshwater; or terrestrial.

 

Aquatic type? lake; or pond; or bogs; or puddles and ditches.

 

Free-living or attached? free-living; or attached in sand or soil.

 

Motile? Not motile.

 

Is mucilage or gelatinous material present? Absent.

 

Filament: Branching type not recorded.

 

Filaments in bundles? not recorded.

 

Filament: Cell arrangement cells abutting.

 

Filament: Filament diameter not recorded.

 

Cell: Individual cell shape cylindrical.

 

Cell: Is there a median constriction (isthmus)? Absent.

 

Cell: Do the cells bear spines or cellular extensions? Absent.

 

Cell: How many flagella per cell? Absent.

 

Cell: Is a red eyespot conspicuous? no.

 

Cell: Heterocytes absent.

 

Cell: Akinetes absent.

 

Cell: Cell length 2–5 µm.

 

Cell: Cell diameter 2–8 µm.

 

Cell: How many pyrenoids per plastid? 0.

 

Cell: How many plastids? 0.

 

Cell: Plastid shape? not recorded.

 

Cell: Position of plastid in cell? not recorded.

 

Colony: Are remnants of the mother cell wall present or is the entire mother cell wall persistent? not recorded.

 

Colony: cell arrangement not recorded.

 

Colony: Shape of colony? not recorded.

 

Colony: Are cells or groups of cells connected by mucilaginous threads? No.

 

Colony: Cells in one layer or throughout not recorded.

 

Capable of forming blooms? Not observed.

 

 

Classification: Division Cyanobacteria (Blue-green algae).

 

Classification: Class Cyanophyceae.

 

Classification: Family Oscillatoriaceae.

 

 

Reference Dillard (1999:115), Day et al. (1995:209), Entwisle et al. (1999c).

  
نویسنده : رضا رمضان نژاد قادی ; ساعت ٢:٠۳ ‎ق.ظ روز چهارشنبه ۱٥ فروردین ۱۳۸٦