The second trophic phase begins with the development of the plasmodium. The multinucleated organism now absorbs via phagocytosis as many nutrients as possible. These are bacteria, protists, dissolved substances, moulds, higher fungi and small particles of organic material. This enables the cell to undergo enormous growth. The nucleus divides multiple times, and the cell soon becomes visible to the naked eye and usually has a surface area – depending on the species – up to one square metre; however, in 1987 one artificially cultivated cell of Physarum polycephalum attained a surface area of 5.5 sq m. Myxogastria species have numerous nuclei in their trophic plasmodium phase; the small, non-veined proto-plasmodia have between 8 and 100 nuclei, while large, veined meshworks have between 100 and 10 million nuclei. All of these remain part of a single cell, which has a viscous, slimy consistency and may be transparent, white or brightly coloured in orange, yellow or pink.
The cell has chemotactic and negative phototactic capabilities in this phase, meaning that it is able to move towards nutrients and away from dangerous substances and light. The movements originate in the grainy cytoplasm, which streams by pulsation in one direction within the cell. In this way the cell reaches a speed of up to 1000 µm per second – the speed in plant cells is 2 to 78 µm per second. A resting state, the so-called sclerotium, may occur in this phase. The sclerotium is a hardened, resistant form composed of numerous "macrocysts", which enable the myxogastria to survive in adverse conditions, for example during winter or dry periods, in this phase.
- Fruit bodies of the myxogastria
Sporangia (pediculated) of Trichia decipiens
Plasmodiocarp of Hemitrichia serpula
Aethalium of Enteridium lycoperdon
Pseudo-aethalium of Lindbladia tubulina
Other articles related to "plasmodium":
... He observed in 1917 three morphologically distinct Plasmodium parasites in the blood of chimpanzees and gorillas ... schwetzi - have since been placed in the subgenus Plasmodium ... The noticeable differences between P falciraum and the other known Plasmodium species lead to the proposal that it be placed in a separate genus Laverina ...
... to a hematological finding that is associated with malaria, exclusively found in Plasmodium ovale and Plasmodium vivax ... Plasmodium vivax induces morphologic alterations in infected host erythrocytes that are visible by light microscopy in Romanovsky-stained blood smears as multiple brick-red dots ...
... Lacertaemoba is a subgenus of the genus Plasmodium - all of which are parasitic protozoa ... was created by Telford to refine the classification of species then given as Plasmodium tropiduri ... Plasmodium Scientific classification Domain Eukaryota Kingdom Chromalveolata Superphylum Alveolata Phylum Apicomplexa Class Aconoidasida Order Haemosporida Family ...
... haemosporida MeSH B01.500.841.075.380.611 --- plasmodium MeSH B01.500.841.075.380.611.461 --- plasmodium berghei MeSH B01.500.841.075.380.611.490 ...