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The microbiome of peatland plants : literature review

Bartkowska Aleksandra, Mieczan Tomasz

Journal of Water and Land Development

2023

no. 59

25--34

The aggregate of various taxonomic groups of microorganisms colonising living organisms is known as the microbiome. The plant microbiome encompasses a wide network of biological, chemical and metabolic interactions between the plant and microorganisms (mainly algae, bacteria and protozoa). The relationships between microbes and peatland plants, particularly carnivorous plants, are a very interesting subject that is still little understood. Microbes colonising carnivorous peatland plants may be present in their traps or on the surface of the plant. Previous research on the relationships between the microbiome composition of carnivorous plants and the external factors influencing it directly and indirectly is still inadequate. There is a lack of review articles analysing the current state of knowledge regarding carnivorous plant-microbiome interactions. This review of the literature is a collection of data on the functioning of the microbiome of carnivorous plants growing in peatland ecosystems. In addition, it summarises the available information on host–microorganism relationships.

Epiphytic Protozoa (testate amoebae and ciliates) associated with Sphagnum in peatbogs: relationship to chemical parameters

Mieczan Tomasz

Polish Journal of Ecology

2007

Vol. 55, nr 1

79-90

The composition and abundance of microorganisms (testate amoebae and ciliates) dwelling in the water in the patches of Sphagnum palustre L. in three peatbogs with different pH values of the Poleski National Park (Eastern Poland) and their relationship to chemical parameters were studied. From April to October 2005 from each peatbog twice a month, eight samples were collected by washing 10 g of a wet mass of plant material in 50 ml of distilled water. A total of 11 testate amoebae taxa and 32 ciliate taxa occurred among Sphagnum palustre. Testate amoebae and ciliates richness and abundance were significantly greater (33 taxa and> 15 ind. g[^-1], respectively) in low pH (4.5) peatbog. Generally, the moss dwelling testacean fauna was dominated by cosmopolitan and ubiquitous taxa. Only four testate amoebae taxa (Arcella vulgaris, Assulina muscurum, Hyalosphenia sp. and Euglypha sp.) showed a clear preference for a low pH. Ciliate communities were dominated by Colpodea, Cyrtophorida, Scuticociliatida and Suctorida. In all peatbogs bacterivorous protozoa occurred in the highest numbers (up to 60%), while algivorous and mixotrophic in the lowest (range from 3 to 10%). Moisture conditions appeared to play a key role in determining the distribution pattern of testacean communities, while pH and the content of total organic carbon in water correlated positively with the total numbers or biomass of testate amoebae and ciliates.