Endophytic microbiota and ectomycorrhizal structure of Alnusglutinosa Gaertn. at saline and nonsaline forest sites
The tolerance of European alder ( Alnus glutinosa Gaertn.) to soil salinity can be attributed to symbiosis with microorganisms at the absorptive root level. However, it is uncertain how soil salinity impacts microbial recruitment in the following growing season. We describe the bacterial and fungal...
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Veröffentlicht in: | Scientific reports 2023-12, Vol.13 (1), p.22831 |
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Zusammenfassung: | The tolerance of European alder (
Alnus
glutinosa
Gaertn.) to soil salinity can be attributed to symbiosis with microorganisms at the absorptive root level. However, it is uncertain how soil salinity impacts microbial recruitment in the following growing season. We describe the bacterial and fungal communities in the rhizosphere and endosphere of
A.
glutinosa
absorptive roots at three tested sites with different salinity level. We determined the morphological diversity of ectomycorrhizal (ECM) fungi, the endophytic microbiota in the rhizosphere, and the colonization of new absorptive roots in the following growing season. While bacterial diversity in the rhizosphere was higher than that in the absorptive root endosphere, the opposite was true for fungi. Actinomycetota, Frankiales,
Acidothermus
sp. and
Streptomyces
sp. were more abundant in the endosphere than in the rhizosphere, while Actinomycetota and
Acidothermus
sp. dominated at saline sites compared to nonsaline sites. Basidiomycota, Thelephorales, Russulales, Helotiales,
Cortinarius
spp. and
Lactarius
spp. dominated the endosphere, while Ascomycota, Hypocreales and
Giberella
spp. dominated the rhizosphere. The ECM symbioses formed by Thelephorales (
Thelephora
,
Tomentella
spp.) constituted the core community with absorptive roots in the spring and further colonized new root tips during the growing season. With an increase in soil salinity, the overall fungal abundance decreased, and
Russula
spp. and
Cortinarius
spp. were not present at all. Similarly, salinity also negatively affected the average length of the absorptive root. In conclusion, the endophytic microbiota in the rhizosphere of
A.
glutinosa
was driven by salinity and season, while the ECM morphotype community was determined by the soil fungal community present during the growing season and renewed in the spring. |
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ISSN: | 2045-2322 |
DOI: | 10.1038/s41598-023-49447-w |