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Growth Responses of Swarming and Gliding Bacteria on Substrates With Different Levels of Stiffness

[+] Author Affiliations
Eun-Jung Park, Myoung-Ock Cho, Jung Kyung Kim

Kookmin University, Seoul, Korea

Paper No. NEMB2010-13154, pp. 341-342; 2 pages
doi:10.1115/NEMB2010-13154
From:
  • ASME 2010 First Global Congress on NanoEngineering for Medicine and Biology
  • ASME 2010 First Global Congress on NanoEngineering for Medicine and Biology
  • Houston, Texas, USA, February 7–10, 2010
  • Conference Sponsors: ASME Nanotechnology Council
  • ISBN: 978-0-7918-4392-5 | eISBN: 978-0-7918-3866-2
  • Copyright © 2010 by ASME

abstract

We conducted experiments to decipher the interplays among bacterial motility, surface stiffness of culture medium, and growth of colony when bacteria grow on semi-solid substrate. We observed the growth kinetics of two kinds of bacteria, swarming Escherichia coli (E.coli) and gliding Myxococcus Xanthus (M.xanthus), grown on semi-solid agar substrates with different stiffness. The colony of M.xanthus moved by traction force on the surface shows a tendency to grow larger on soft substrate. The colony of E.coli using flagella shows a similar tendency in the early phase but later grows smaller on substrate with lower stiffness. We found that the growth of bacterial colony is affected by the mechanical properties of the substrate and the type of bacterial motility as well.

Copyright © 2010 by ASME
Topics: Stiffness , Bacteria

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