Tribonema

Tribonema
Systematics
without rank: Sar without rank: Stramenopiles (stramenopiles) without rank: Yellow-green algae (Xanthophyceae) without rank: Tribonematales Family : Tribonemataceae Genre : Tribonema
Scientific name
Tribonema
Derbès & Solier , 1851

Tribonema is an algae - genus from the class of yellow-green algae (Xanthophyceae).

description

Tribonema forms unbranched threads with a diameter of 1.5 to 35 µm, which consist of cylindrical cells . Their cell nucleus is in the middle, in the periphery there are usually numerous green plastids without pyrenoids . Reserve carbohydrates are deposited outside the plastids in the cytoplasm; there is no starch formation. The cell walls consist of two H-shaped halves, which can be seen as open half-cylinders at the thread ends.

Reproduction

The asexual multiplication takes place by the formation of zoospores carrying two unequal flagella. To release the zoospores, the two cell halves unfold and the thread breaks up into two sub-threads with open semicylinders at the end.

Sexual reproduction is unknown.

distribution

Tribonema lives in stagnant, less often flowing waters, often also in moors; Tribonema viride can also be found in moist soil.

Types (selection)

• Tribonema elegans
• Tribonema minus
• Tribonema monochloron
• Tribonema viride
• Tribonema vulgare

swell

literature

• Karl-Heinz Linne von Berg, Michael Melkonian u. a .: The Kosmos algae guide. The most important freshwater algae under the microscope. Kosmos, Stuttgart 2004, ISBN 3-440-09719-6 .

Individual evidence

1. ↑ Heinz Streble , Dieter Krauter : Life in the water drop. Microflora and microfauna of freshwater. An identification book. 10th edition. Kosmos, Stuttgart 2006, ISBN 3-440-10807-4 .

Web links

• Tribonema at algaebase.org
• Images of Tribonema vulgare