Phycology جلبک شناسی

نخستین پایگاه اطلاعاتی جلبک شناسی به زبان فارسی

Actinotaenium

General appearance of alga? Non-motile microalgae (single cells).

Colour? green.

Habitat freshwater; or terrestrial.

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

Free-living or attached? free-living.

Motile? not recorded.

Is mucilage or gelatinous material present? Absent.

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 ellipsoid; or ovoid.

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

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 20–260 µm.

Cell: Cell diameter 7–110 µm.

Cell: How many pyrenoids per plastid? 2–10.

Cell: How many plastids? 1.

Cell: Plastid shape? star-shaped.

Cell: Position of plastid in cell? Axial; or Parietal.

Colony: Are remnants of the mother cell wall present or is the entire mother cell wall persistent? Mother cell wall absent.

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.

Distribution Western Australia; or Northern Territory; or South Australia; or Queensland; or New South Wales; or Victoria; or Tasmania.

Classification: Division Chlorophyta (Green Algae).

Classification: Class Zygnematophyceae.

Classification: Family Desmidaceae.

referred to Cosmarium, Cylindrocystis, Penium and others.

Species and distribution Nine species reported from Australia.

Reference Croasdale & Flint (1988: 33-39), Dingley (2001), Ling et al. (2000:163), Day et al. (1995:77), Entwisle et al. (1999c

  
نویسنده : رضا رمضان نژاد قادی ; ساعت ۱٠:۳٢ ‎ق.ظ روز یکشنبه ۱٢ آبان ۱۳۸٧