Plants store their food in form of starch but transport it in form of fructose. Why?
Answers
When plants have a period of dormancy to survive, they store their food as starch. They store enough of this energy so as to be able to maintain metabolism for the entire period of dormancy.
In addition we know that starch is not water soluble hence lacks the ability to pull water into storage cells or cause irregularity in water balance. More energy are packed into less space by starch molecules far more than glucose or sucrose yet they are able to release this energy easily, hence maximizing storage and mobilization.
Glucose is not directly transported by plants to storage. Rather in a plant stem the form of carbohydrate being transported is sucrose or fructose because it is a non reducing and does not react with oxygen during transport in the stem to specialised storage plastids.
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