Sammanfattning

In 2010, dieback of Norway spruce (Picea abies) was observed in Latvia. As mostly stands on seasonally or permanently water-saturated soils were damaged, we hypothesized that the recorded foliar damage might be associated with belowground factors. We established 48 sample plots in stands with damage symptoms for soil parameter evaluation and fine root sampling to determine the number of fine roots in different growth stages and to describe the associated fungal community. Among sample plots on organic soils, there were fewer viable older fine roots and greater number of dead fine roots in more damaged sites than in less damaged. These root parameters were significantly correlated with higher groundwater level and soil pH. The fungal community was dominated by ectomycorrhizal (ECM) species (the most common was Tylospora asterophora), the endophyte Oidiodendron maius and saprotrophic species Cryptococcus magnus. Saprotrophic species had higher abundance in more damaged sites, suggesting a shift in fungal communities from ECM fungi. In conclusion, the results of this work suggest Norway spruce root system response to short-term climatic stress, which should be considered when planning spruce forest management, especially on organic soils with a high groundwater level.

Nyckelord

Picea abies; fine roots; soil conditions; organic soils; climatic stress; drainage; ectomycorrhizal fungi

Publicerad i

Scandinavian Journal of Forest Research
2016, Volym: 31, nummer: 2, sidor: 156-165
Utgivare: TAYLOR & FRANCIS AS

SLU författare

• Menkis, Audrius

  • Institutionen för skoglig mykologi och växtpatologi, Sveriges lantbruksuniversitet
    

Associerade SLU-program

SLU Nätverk växtskydd


UKÄ forskningsämne

Mikrobiologi
Skogsvetenskap


Publikationens identifierare

DOI: https://doi.org/10.1080/02827581.2015.1069390

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/69990