why might flagella be more common in rod-shaped bacteria?

About microscopic forms of life, including Bacteria, Archea, protozoans, algae and fungi. Topics relating to viruses, viroids and prions also belong here.

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ludwigye
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why might flagella be more common in rod-shaped bacteria?

Post by ludwigye » Tue Nov 15, 2005 8:57 pm

why might flagella be more common in rod-shaped bacteria?

any idear? the question was given as part of courswork.

Geordie Boy
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Post by Geordie Boy » Fri Nov 18, 2005 8:14 am

I was interested in the answer to this question so i fired of an e-mail to my microbiology professor. This is the answer he gave:

"I have no idea! (sometimes it’s easier to ask the question than to find the answer!)

Rod-shaped bacteria are quite common, so maybe it’s more to do with that."

Thats a hard question you have on your hands

chetanladdha
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Re: why might flagella be more common in rod-shaped bacteria

Post by chetanladdha » Fri Nov 18, 2005 5:01 pm

ludwigye wrote:why might flagella be more common in rod-shaped bacteria?

any idear? the question was given as part of courswork.

hey, i m not sure but geometrically,, for any rod shaped body to move,, a tail like structure is necessary.. i m a mathematics student too...

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MrMistery
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Post by MrMistery » Fri Nov 18, 2005 6:53 pm

Correct me if i am wrong(i stink at maths) but isn't some sort of propulsion necessary for the movement of any body? Also, the paramecium has an aproximate rod-shape and it moves through cilia...
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter

ushishir
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Re: why might flagella be more common in rod-shaped bacteria

Post by ushishir » Fri Nov 18, 2005 9:31 pm

I don't know the answer but something to consider is that bacteria experience very different forces from larger organisms. For bacteria viscosity is the primary influence on motility, they have almost no inertia so they stop dead as soon as they stop propelling themselves see: Life at Low Reynolds Number - http://brodylab.eng.uci.edu/~jpbrody/re ... rcell.html

There are several other ways bacteria can move, for example some 'push' themselves along surfaces by secreting slime and some 'pull' themselves with little pili.

Geordie Boy
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Post by Geordie Boy » Fri Nov 18, 2005 11:15 pm

Maybe its just there so that we can tell when they are happy :D

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