Impact of grey alder on microflora of rhizosphere of Norway spruce and on its antagonism against Heterobasidion annosum | Baltalkšņa ietekme uz egļu sakņu rizosfēras mikrofloru un tās antagonismu pret Heterobasidion annosum
2008
Arhipova, N., Latvian State Forest Research Inst. Silava, Salaspils (Latvia) | Gaitnieks, T., Latvian State Forest Research Inst. Silava, Salaspils (Latvia) | Nikolajeva, V., University of Latvia, Salaspils (Latvia). Inst. of Biology | Vulfa, L., University of Latvia, Salaspils (Latvia). Inst. of Biology | Mihailova, A., University of Latvia, Salaspils (Latvia). Inst. of Biology
To evaluate the impact of grey alder Alnus incana (L.) Moench on the microflora of root rhizosphere of Picea abies (L.) Karst., in mixed spruce-alder stands, there were collected soil samples in three sample plots in the root zone of grey alder and spruce, respectively. Soil samples from the adjoining stands were taken for the control. The dilution as well as the soil-clot method has been used to characterize microflora. The soil microflora antagonism against Heterobasidion annosum was also analysed. The antagonism of the root rhizosphere and also of some isolated microscopic fungi against H. annosum was also described. The obtained data show the amount of microscopic fungi in the root rhizosphere of spruce in mixed stands [(3,6+-0,6)xl03 cfu/g] to exceed that for pure stands of spruce [(2,0+-0,2)xl03 cfu/g]; P is less than 0,01. In mixed stands the diversity of microscopic fungi in the root rhizosphere of spruce and alder is higher than in pure stands of spruce. It was found that the presence of Trichoderma spp. in the rhizosphere of grey alder was more abundant as compared to that of spruce. Out of total number of microscopic fungi isolated from the rhizosphere of spruce and grey alder in mixed stands the number of fungi antagonistic against H annosum was higher compared with those isolated from the root rhizosphere in pure stands of spruce.
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