Department of Biotechnology, Universidad Autonoma Metropolitana-Iztapalapa, Mexico City, DF, Mexico.
J Basic Microbiol. 2012 Apr;52(2):167-74. doi: 10.1002/jobm.201000528. Epub 2011 Sep 23.
A thermotolerant white-rot fungus was identified as Fomes sp. EUM1. The strain exhibited maximum growth at 30 °C, with activation and inactivation energy values of 68 and 32 kJ/mol, respectively. The temperature affected the hyphal morphology, which was related to the thermotolerance of the microorganism: A shift from 30 to 40 °C in the growth temperature caused a decrease (15%) in mycelium branching; also longer (32%) and thinner (13%) hyphae were produced. In addition, as the temperature rose from 25 to 45 °C, an increase was observed in both the hyphal surface area (43%) and the surface growth rate (193%). The modification of the hyphal morphology suggests a strategy to colonize nutrient-rich areas while spending minimal energy for biomass formation under thermal stress.
鉴定出一株嗜热白腐真菌为 Fomes sp. EUM1。该菌株在 30°C 时生长最快，其活化能和失活动能分别为 68 和 32 kJ/mol。温度会影响菌丝形态，这与微生物的耐热性有关：生长温度从 30°C 升高到 40°C 会导致菌丝分支减少（15%）；产生的菌丝也更长（32%）、更细（13%）。此外，当温度从 25°C 升高到 45°C 时，菌丝表面积（43%）和表面生长速率（193%）都有所增加。菌丝形态的改变表明，在热应激下，该菌形成生物量所需的能量最少，同时采取一种策略来定植在营养丰富的区域。
