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Temperature acclimation and adaptation of enzyme physiology in Neurospora discreta
- Source :
- Allison, SD; Romero-Olivares, AL; Lu, L; Taylor, JW; & Treseder, KK. (2018). Temperature acclimation and adaptation of enzyme physiology in Neurospora discreta. Fungal Ecology, 35, 78-86. doi: 10.1016/j.funeco.2018.07.005. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/5sr408j5
- Publication Year :
- 2018
- Publisher :
- eScholarship, University of California, 2018.
-
Abstract
- © 2018 Elsevier Ltd and British Mycological Society Fungal metabolic rates could increase under climate warming but may be counteracted by mechanisms of physiological acclimation and evolutionary adaptation. We hypothesized that Vmax and Km parameters of Neurospora discreta extracellular enzymes would acclimate to warmer temperatures through compensatory mechanisms. We also predicted that evolution under warmer temperatures would alter enzyme parameters and fungal respiration through adaptive mechanisms. In contrast to these predictions, growth at higher temperature (22 °C versus 16 °C) increased the temperature-corrected Vmax of three enzymes. The carbon substrate used for fungal growth (lignin versus sucrose) had a much greater impact on enzyme Vmax than temperature. Following experimental evolution, the enzymatic parameters of Neurospora strains did not adapt to higher temperatures as hypothesized; rather, enzyme Vmax values were unaffected, and respiration rates increased. Together, these results suggest that physiological and evolutionary mechanisms are unlikely to counteract soil carbon losses driven by saprotrophic fungi under climate warming.
- Subjects :
- 0106 biological sciences
Sucrose
Extracellular enzyme
Plant Science
Biology
010603 evolutionary biology
01 natural sciences
Acclimatization
Neurospora
Microbiology
Km
chemistry.chemical_compound
Respiration
Extracellular
Climate change
Physiological acclimation
Ecology, Evolution, Behavior and Systematics
chemistry.chemical_classification
Experimental evolution
Ecology
Ecological Modeling
04 agricultural and veterinary sciences
Biological Sciences
biology.organism_classification
Soil carbon
Vmax
Climate Action
Thermal adaptation
Enzyme
chemistry
Neurospora discreta
040103 agronomy & agriculture
Biophysics
0401 agriculture, forestry, and fisheries
Adaptation
Environmental Sciences
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Allison, SD; Romero-Olivares, AL; Lu, L; Taylor, JW; & Treseder, KK. (2018). Temperature acclimation and adaptation of enzyme physiology in Neurospora discreta. Fungal Ecology, 35, 78-86. doi: 10.1016/j.funeco.2018.07.005. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/5sr408j5
- Accession number :
- edsair.doi.dedup.....7bcd6d43961a634270834763bca1b9d7