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- W2553545548 abstract "Most European forest trees live in symbiosis with ectomycorrhizal (EM) fungi. Nevertheless, relatively little is known about the mycobiont (fungal EM-partner) species composition and abundances of nursery plants. In this study we therefore investigate EM symbiosis partner of Larix decidua, Picea abies and Pinus cembra seedlings and plantlets from six forest nurseries in South Tyrol (Aicha /Aica, Prad /Prato, Prettau /Predoi, Radein /Redagno, Ulten /Ultimo, Welsberg /Monguelfo). We were interested in dominant mycobionts of each host plant, and if there were differences in species richness and composition between seedling provenances of one host plant species, between different plant species, between nurseries and between season or plant age. Sampling was performed in autumn 2006 and in spring 2007. Mycorrhized root tips were sorted into EM morphotypes (MTs), and rDNA ITS sequences were generated for several representatives of each MT. Thus, analysed 28,290 root tips and detected a total of 39 MT. The rate of mycorrhization was 100 % in autumn and about 97 % in spring in all nurseries and on all plant species. The lower mycorrhization rates in spring were probably caused by the strong growth impulse of plants during this period. The three host plants differed significantly from each other in species composition. The latter was found to be nursery-specific for Larix decidua and Pinus cembra. Seedling provenance was never significant for mycobiont species composition in nursery plants. However, species composition changed with plant age or season: the Wilcoxina mikolae complex dominated on seedlings, being later replaced either by host specific mycobionts, or by mycobionts with a long-distance distribution type. We detected 14 fungal mycobiont species associated with Larix decidua. Wilcoxina mikolae and several host-specific Suillus spp. (S. aeruginascens, S. grevillei, S. tridentinus) were found in all three nurseries. The species composition was nursery specific. Picea abies root tips were associated with three fungal species only: Wilcoxina sp., Tuber puberulum, and Amphinema byssoides. The two analysed nurseries did not differ from each other in mycobiont species composition nor in relative abundances. Similar to Larix, also Pinus cembra nursery plants exhibited a high mycobiont species richness (12 spp.). Nurseries did not differ significantly from each other in the number of mycobiont species, but species composition was partly different. Wilcoxina sp. and Pinus cembra - specific Suillus spp. (S. placidus, S. plorans, S. sibiricus) dominated in all nurseries. Although partly being raised in the same nursery, the three host plants L. decidua, Picea abies and Pinus cembra differed significantly in mycobiont species richness and species composition. The mycobiont species composition was specific for each plant: Amphinema byssoides and Wilcoxina sp. 1 were the only taxa detected on two hosts plant species, Picea abies and Pinus cembra. The mycorrhizal communities of L. decidua and Pinus cembra were characterised by the occurrence of host specific fungi (Suillus spp.)." @default.
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- W2553545548 date "2010-01-01" @default.
- W2553545548 modified "2023-09-27" @default.
- W2553545548 title "Ectomycorrhizal status of Larix decidua-, Picea abies- and Pinus cembra-nursery plants in South Tyrol" @default.
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