The scarlet firethorn (Pyracantha coccinea)
Sunday, November 27, 2016
Sunday, November 20, 2016
Saturday, November 19, 2016
Sunday, November 6, 2016
Autumn in Munich. Why leaves change their color? 23-10-16
Today there has been a beautiful autumn day with a lot of sunshine. With
the sun shining brightly and surrounded by vibrant fall leaves - jogging during
such a day was a pleasure! For the jogging, I
took a camera with me to capture the beauty of autumn ;)
Have you ever wondered why leaves change their color during autumn?
Leaves are the parts of a tree that are responsible for the production of
nutrients. Leaves contain chlorophyll, which is a green pigment. Chlorophyll is
extremely important for the plants, because it enables the conversion of H2O and CO2 into glucose, which is known as photosynthesis. For this reaction, the sunshine
is necessary. During autumn and winter the temperature drops and exposure of trees
to the sunlight
is decreased, therefore trees change their metabolism (´´go slow´´) and prepare
for a dormancy period. One sign of such a preparation is degradation of chlorophyll in the leaves. This results in unmasking of other pigments, such as carotenoids
and anthocyanins, and thus leaves turn yellow, orange or red! :-) :-) :)
The formula for photosynthesis:
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