Experiment with Plant Pigments Anthocyanins
are really interesting pigments! They are responsible
for the
red color in the
tips
of emerging
tulip
shoots. They are found in a lot of fruits and
vegetables, too.
Try
this experiment!
Now Experiment: Put a tablespoon each of bleach, vinegar, and water in 3 clear glass containers. Add a few drops of grape juice to each. Describe what happens to the pigment in each liquid. Conclusion: Compare
what you saw with your prediction. Was your prediction correct? Write
a sentence describing what happened to the anthocyanin pigment in each
liquid.
Pigments
can change color in different environments. Our solutions have
very different characteristics; one is alkaline (bleach), one is neutral
(water), and one is acetic (vinegar).The soils that plants grow in
also have different characteristics that can affect
anthocyanin
pigments.
These are the pigments responsible for
the
red
tips
of emerging
tulip
shoots in the spring.
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