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Respiration rate determinations suggest H eterobasidion parviporum subpopulations have potential to adapt to global warming
Author(s) -
Müller M. M.,
Hamberg L.,
Kuuskeri J.,
LaPorta N.,
Pavlov I.,
Korhonen K.
Publication year - 2015
Publication title -
forest pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.535
H-Index - 49
eISSN - 1439-0329
pISSN - 1437-4781
DOI - 10.1111/efp.12203
Subject(s) - biology , respiration , horticulture , respiration rate , botany , phenotypic plasticity , zoology , ecology
Summary Trees are known to have adapted to local climatic conditions, but the adaptation of their pathogenic associates is poorly understood. Heterobasidion parviporum causes root and butt rot in spruce. In this work, the respiration of H . parviporum subpopulations from climatically diverse environments was examined at various temperatures. Isolates were obtained from three areas in E urope (southern F inland, D enmark and northern I taly) and from two locations in C entral S iberia ( K rasnoyarsk and I rkutsk). Respiration rates were measured in gas tight vials at eight temperatures from 0 to 33°C, using spruce saw dust as the sole substrate. Strains from Siberian locations with cold winters had higher activity at low temperatures (2–15°C) than strains from E uropean locations with mild winters. Respiration rates of S iberian subpopulations increased more than those of E uropean strains when the temperature rose from 0 to 6°C, but the increase was greater with the E uropean subpopulations when the temperature increased further from 6 to 20°C. Only small differences were found among E uropean as well as S iberian subpopulations. Variation in respiration rates between subpopulations was low compared to variation within subpopulations. Using strains isolated 2–18 years ago and thereafter stored at 5°C, we found lower respiration rates at 20°C in older isolates, independent of geographical origin, suggesting phenotypic plasticity of H . parviporum in regard to responses to temperature. Based on these findings, we propose that subpopulations of H . parviporum have the potential to adapt to global warming.