Phycology جلبک شناسی

نخستین پایگاه اطلاعاتی جلبک شناسی به زبان فارسی

معرفی جنس Aphanothece

Aphanothece

 

General appearance of alga? Soft or firm colony (many cells or filaments); or Blue-green algae - cells without organelles.

 

Colour? green; or blue; or olive.

 

Habitat freshwater; or saline; or terrestrial.

 

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

 

Free-living or attached? attached to rocks; or attached in sand or soil.

 

Motile? Not motile.

 

Is mucilage or gelatinous material present? Mucilage present in obvious concentric rings around each cell or group of cells in the colony.; or Mucilage present but not stratified.

 

Filament: Branching type not recorded.

 

Filaments in bundles? not recorded.

 

Filament: Cell arrangement not recorded.

 

Filament: Filament diameter not recorded.

 

Cell: Individual cell shape globose or spherical; or cylindrical; or ovoid.

 

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 1.5–8 µm.

 

Cell: Cell diameter 1–4 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? Mother cell wall absent.

 

Colony: cell arrangement Irregularly arranged (no uniform number of cells); or Cells in groups of 2.

 

Colony: Shape of colony? Irregular or amorphous (no clear shape).

 

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

 

Colony: Cells in one layer or throughout throughout colony.

 

Capable of forming blooms? Not observed.

 

 

Classification: Division Cyanobacteria (Blue-green algae).

 

Classification: Class Cyanophyceae.

 

Classification: Family Microcystaceae.

 

Reference Skinner et al. (2001a:576), McGregor et al. (2001:18), Komarek et al. (1999:71), Baker (1992:21), Bourelly (1970:315), Smith (1950:560), Dillard (1999:84), Ling et al. (

2000:12), Day et al. (1995:201), Entwisle et al. (1999c).

 

 

 

 

 

  
نویسنده : رضا رمضان نژاد قادی ; ساعت ۱٢:٤٩ ‎ق.ظ روز چهارشنبه ٩ اسفند ۱۳۸٥