Tolerance of soil flagellates to increased NaCl levels.

TY - JOUR

T1 - Tolerance of soil flagellates to increased NaCl levels.

AU - Ekelund, Flemming

N1 - Keywords: Adaptation, Physiological; Animals; Culture Media; Mastigophora; Sodium Chloride; Soil

PY - 2002

Y1 - 2002

N2 - The ability of heterotrophic flagellates to survive and adapt to increasing salinities was investigated in this study. Whole soil samples were subjected to salinities corresponding to marine conditions and clonal cultures were used to perform growth and adaptation experiments at a wide range of different salinities (0-50 ppm). More morphotypes tolerant to elevated NaCl levels were found in road verge soil that was heavily exposed to de-icing salt than in less exposed soils, though there were fewer tolerant than intolerant morphotypes in all soils examined. Heterotrophic flagellates isolated on a freshwater medium from a non-exposed soil were unable to thrive at salinities above 15 ppt, and showed reduced growth rates even at low salt salinities (1-5 ppt). The findings suggest that heterotrophic soil flagellates are less tolerant to NaCl than their aquatic relatives, possibly due to their long evolutionary history in soil, and support the idea that identical morphospecies may differ considerably with respect to physiology

AB - The ability of heterotrophic flagellates to survive and adapt to increasing salinities was investigated in this study. Whole soil samples were subjected to salinities corresponding to marine conditions and clonal cultures were used to perform growth and adaptation experiments at a wide range of different salinities (0-50 ppm). More morphotypes tolerant to elevated NaCl levels were found in road verge soil that was heavily exposed to de-icing salt than in less exposed soils, though there were fewer tolerant than intolerant morphotypes in all soils examined. Heterotrophic flagellates isolated on a freshwater medium from a non-exposed soil were unable to thrive at salinities above 15 ppt, and showed reduced growth rates even at low salt salinities (1-5 ppt). The findings suggest that heterotrophic soil flagellates are less tolerant to NaCl than their aquatic relatives, possibly due to their long evolutionary history in soil, and support the idea that identical morphospecies may differ considerably with respect to physiology

U2 - 10.1111/j.1550-7408.2002.tb00378.x

DO - 10.1111/j.1550-7408.2002.tb00378.x

M3 - Journal article

C2 - 12188223

SN - 1066-5234

VL - 49

SP - 324

EP - 328

JO - Journal of Eukaryotic Microbiology

JF - Journal of Eukaryotic Microbiology

IS - 4

ER -