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Controlling Flow Speeds of Microtubule-Based 3D Active Fluids Using Temperature

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TEMPERATURE CHARACTERISTICS FOR SPEED OF MOVEMENT OF THIOBACTERIA.

W J Crozier¹, T J Stier

¹Laboratory of General Physiology, Harvard University, Cambridge.

The Journal of General Physiology

|October 30, 2009

Summary

This summary is machine-generated.

Temperature significantly influences the movement speed of Beggiatoa alba. Different temperature ranges show distinct thermal characteristics affecting bacterial motility.

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Area of Science:

Microbiology
Bacteriology
Microbial Physiology

Background:

Beggiatoa alba and Thiothrix are sulfur-oxidizing bacteria.
Bacterial motility is crucial for nutrient acquisition and environmental adaptation.
Temperature is a key environmental factor influencing microbial metabolic rates and movement.

Purpose of the Study:

To investigate the effect of temperature on the translatory movement speed of Beggiatoa alba.
To determine the temperature characteristics (micro values) for different temperature ranges.
To compare the thermal response of Beggiatoa alba with Thiothrix and photosynthetic Oscillatoria.

Main Methods:

Measurement of translatory movement speed of Beggiatoa alba across a temperature gradient.
Calculation of temperature characteristics (micro values) using established methods.
Comparative analysis of motility data across different bacterial species and temperature ranges.

Main Results:

The speed of Beggiatoa alba shows distinct temperature dependencies between 5°C and 33°C.
Specific micro values of 16,100 and 8,400 were calculated for the 5°C-16.5°C and 16.5°C-33°C ranges, respectively.
A notable "break" in motility progression occurs between 16°C-17°C, with increased speed variation above this point. Thiothrix exhibited a micro value of 8,300 above 16°C.

Conclusions:

Temperature is a critical determinant of Beggiatoa alba motility.
The observed thermal characteristics suggest distinct physiological responses to temperature changes.
Findings provide insights into the ecological adaptations of sulfur-oxidizing bacteria and allow for comparison with other microbial groups.