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potato cells

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potato cells

Postby mazza » Sun Oct 16, 2005 6:24 pm

Hiya all :)

Why does iodine turn potato cells blue under the microscope.

Many thanks to everyone who replies to me. I have been searching for this for the past 6 weeks

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Postby biocraz » Sun Oct 16, 2005 7:24 pm

Normally iodine solution will turn into dark blue on potato cells as they contain starch. May be it is because of the light of the microscope which makes the cells appear blue.
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Postby Poison » Sun Oct 16, 2005 7:27 pm

iodine is the indicator of starch. That color turning means potato cells have starch.
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Postby victor » Mon Oct 17, 2005 11:24 am

Lugol Solution is one example of Iodine isn't it?
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Postby iri_black » Mon Oct 17, 2005 2:42 pm

True, Lugol's solution contains iodine and KI and is used to determine the starch quantity.
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Postby victor » Wed Oct 19, 2005 10:51 am

But, during the comparison between amylum suspension and potato suspension I found something strange...When I put Lugol solution into the amylum suspension, it turns to dark blue. But, when I put lugol solution into the potato suspension, it turns to dark blue, but only for a while...after that it turns to the normal colour again..(yellowish)..anyone can explain what happened there?
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