Associations Between Cyanobacteria and Mosses

Solheim, Bjørn; Zielke, Matthias

doi:10.1007/0-306-48005-0_8

Cited by 40 publications

(45 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Azolla-Anabaena symbiosis often occurs in rice culture, where it results in enhanced rice performance due to a N fertilizer effect from BNF (Yanni, 1992). Diazotrophic cyanobacteria have also been found in the coralloid roots of cycads (Gehringer et al, 2010), auricles of liverworts (Adams & Duggan, 2008), slime cavities of hornworts (Adams & Duggan, 2008), stem glands of Gunnera (Bergman et al, 1992), hyphae of lichens (Jayasinghearachchi & Seneviratne, 2004) and on the leaf surfaces of mosses (Solheim & Zielke, 2002), where they fix and transfer N to the non-N 2 fixing partner. To facilitate locating a suitable symbiotic partner, some cyanobacteria belonging to the order Nostocales can differentiate into motile segments termed hormogonia that travel chemotactically toward a potential partner (Campbell & Meeks, 1989).…”

Section: Cyanobacterial Associationsmentioning

confidence: 99%

Nitrogen Fixation Outside and Inside Plant Tissues

Chanway¹,

Anand²,

Yang³

2014

Advances in Biology and Ecology of Nitrogen Fixation

View full text Add to dashboard Cite

Section: Cyanobacterial Associationsmentioning

confidence: 99%

Nitrogen Fixation Outside and Inside Plant Tissues

Chanway¹,

Anand²,

Yang³

2014

Advances in Biology and Ecology of Nitrogen Fixation

View full text Add to dashboard Cite

“…The cyanobacterial community found in the glacier forefield was very similar to that found in mature biological soil crusts (BSCs) from the Colorado plateau and Chihuahuan desert [86], but crust formation was not evident at the sampling sites. Cyanobacteria are known to form symbioses with mosses (e.g., Azolla, Hepatica) [78], which are frequently associated with vegetation patches in the glacier forefield. Cross contamination with traces of moss biomass or BSCs cannot be ruled out but seems unlikely especially for rhizosphere samples.…”

Section: Closest Cultivated Relatives Librariesmentioning

confidence: 99%

High Diversity of Diazotrophs in the Forefield of a Receding Alpine Glacier

et al. 2008

View full text Add to dashboard Cite

Forefields of receding glaciers are unique and sensitive environments representing natural chronosequences. In such habitats, microbial nitrogen fixation is of particular interest since the low concentration of bioavailable nitrogen is one of the key limitations for growth of plants and soil microorganisms. Asymbiotic nitrogen fixation in the Damma glacier (Swiss Central Alps) forefield soils was assessed using the acetylene reduction assay. Free-living diazotrophic diversity and population structure were resolved by assembling four NifH sequence libraries for bulk and rhizosphere soils at two soil age classes (8-and 70-year ice-free forefield). A total of 318 NifH sequences were analyzed and grouped into 45 unique phylotypes.Phylogenetic analyses revealed a higher diversity as well as a broader distribution of NifH sequences among phylogenetic clusters than formerly observed in other environments. This illustrates the importance of free-living diazotrophs and their potential contribution to the global nitrogen input in this nutrient-poor environment. NifH diversity in bulk soils was higher than in rhizosphere soils. Moreover, the four libraries displayed low similarity values. This indicated that both soil age and the presence of pioneer plants influence diversification and population structure of free-living diazotrophs.

show abstract

“…Additionally, a Confocal Laser Scanning Microscopy, CLSM (Bio-Rad Radiance 2000), determined whether the measured rates of N 2 fixation corresponded to the degree of moss colonisation by cyanobacteria. The technique, described in detail by Solheim et al (2004), is nondestructive and allows for optical cross-section observations of intact moss samples. Detected cyanobacterial filaments were found present in leaf groves and moss axils, with largest colonies observed along the mid-length shoot segments (Fig.…”

Section: Site Description and Plant Materials Samplingmentioning

confidence: 99%

Isotopic analysis of cyanobacterial nitrogen fixation associated with subarctic lichen and bryophyte species

et al. 2010

View full text Add to dashboard Cite

Dinitrogen fixation by cyanobacteria is of particular importance for the nutrient economy of cold biomes, constituting the main pathway for new N supplies to tundra ecosystems. It is prevalent in cyanobacterial colonies on bryophytes and in obligate associations within cyanolichens. Recent studies, applying interspecific variation in plant functional traits to upscale species effects on ecosystems, have all but neglected cryptogams and their association with cyanobacteria. Here we looked for species-specific patterns that determine cryptogam-mediated rates of N 2 fixation in the Subarctic. We hypothesised a contrast in N 2 fixation rates (1) between the structurally and physiologically different lichens and bryophytes, and (2) within bryophytes based on their respective plant functional types. Throughout the survey we supplied 15 N-labelled N 2 gas to quantify fixation rates for monospecific moss, liverwort and lichen turfs. We sampled fifteen species in a design that captures spatial and temporal variations during the growing season in Abisko region, Sweden. We measured N 2 fixation potential of each turf in a common environment and in its field sampling site, in order to embrace both comparativeness and realism. Cyanolichens and bryophytes differed significantly in their cyanobacterial N 2 fixation capacity, which was not driven by microhabitat characteristics, but rather by morphology and physiology. Cyanolichens were much more prominent fixers than bryophytes per unit dry weight, but not per unit area due to their low specific thallus weight. Mosses did not exhibit consistent differences in N 2 fixation rates across species and functional types. Liverworts did not fix detectable amounts of N 2 . Despite the very high rates of N 2 fixation associated with cyanolichens, large cover of mosses per unit area at the landscape Plant Soil (2010) 333:507-517

show abstract

Associations Between Cyanobacteria and Mosses

Cited by 40 publications

References 42 publications

Nitrogen Fixation Outside and Inside Plant Tissues

Nitrogen Fixation Outside and Inside Plant Tissues

High Diversity of Diazotrophs in the Forefield of a Receding Alpine Glacier

Isotopic analysis of cyanobacterial nitrogen fixation associated with subarctic lichen and bryophyte species

Contact Info

Product

Resources

About