Ii a cushion like sessile sporophore or fused

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(ii) A cushion-like sessile sporophore or fused sporangia ( Aethelium ) (iii)Group of sessile and distinctly unfused sporangia ( Pseudoaethelium ) (iv)Thickening and accumulated protoplasm in a main vein develops into a fruit body ( Plasmodiocarp )
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F C Fig. 8: Illustration of fruit bodies produced by myxomycota. A, A*- Columnar structure showing attached sporangial fructification, B- Sporangia at different stages of maturity, C- Capillitia [Singular- Capillitium], E-Plasmodiocarp, D-Aethelium, F-Pseudocapillitium
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Classification Informal regrouping of the members of the myxomycota phylum is based on the nature of their trophic stage e.g. cellular slime mould (acrasids, dictyostelium), Plasmodial slime mould (acellular – true slime mould e.g. myxomycetes), net-slime mould (labyrinthulomycetes), and endoparasitic slime mold (plasmodiophoromycetes). The grouping of the phylum into 7 classes (protosteliomycetes, ceratiomyxomycetes, dictyosteliomycetes, acrasiomycetes, myxomycetes, plasmodiophoromycetes and labyrinthulomycetes by Olive (1975) in the Kingdom Protista and Hawksworth (1983) in the Kingdom Fungi have undergone numerous changes. Classification is based on a number of factors which include nature of sporangia, presence or absence of lime (CaCO 3 )/location, presence or absence of columella, number of spores, etc. For the purpose of this lecture, we would only look at the CLASSES Acrasiomycetes and Myxomycetes respectively even though other classification systems comprised the classes to include protosteliomycetes, dictyosteliomycetes acrasiomycetes and myxomycetes
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Economic Importance The economic values afforded humanity by members of the phylum myxomycota is still under-explored and under-studied. This may be attributed to the controversy surrounding their definitive classification and confounded ancestry Some of the economic values which may also translate to the reason for studying them could include: (i) Their feeding stage is bacteriophilic, meaning the scavenge and feed on bacteria in their environment. This attribute may be useful to humanity in depleting harmful bacteria population. (ii) Many saprohytic species of myxomycota may participate in bioweathering, mineralization, biodegradation and humification of the soil. Suffices to say that they play a role in the global nutrient cycle
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Continuation (iii) Ideal candidate for biochemical, genetic, molecular, cytological, biological, mycological, biophysical researches. (iv) Myxomycota species exhibit colourful patterns in both nature and under lenses which suggest that they may be valuable for artistic purposes and generating beautiful designs in textile and carpet industries. (v) they have also been implicated in the biodeterioration and defacing of ornamentals, statues and other artifacts
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CLASS-Acrasiomycetes Acrasiomycetes are informally referred to as cellular or amoeboid slime mould or acrasid and one of the most primitive small group of the phylum myxomycota.
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  • Fall '19
  • Spore, Slime mold, multinucleate sporangia

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