Why do flowers wither as soon as they are cut from a stem of a plant? What is or are the chemicals used to sustain  the freshness of a flower for at least three days . write the chemical formula or equation.

Expert Answers

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As soon as a flower is cut from its stem, it is basically separated from its life support system. Delicate vascular tissue, consisting of xylem tubes which conduct water up and phloem which can transport food from the leaves to all parts of the plant, and cut and transport can no longer occur. To prevent withering, cut the stems on an angle to expose a lot of the conducting tubes and place in water. The chemicals in a flower packet contain sugar, which is a food source, an acid, to aid in transport and a biocide. This biocide kills bacteria which can plug up the conducting bundles, thereby stopping transport.

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