Leaf Of Red Oak In Autumn Colour is a photograph by George Bernard/science Photo Library which was uploaded on February 15th, 2021.
Leaf Of Red Oak In Autumn Colour
Oak leaf. Macrophotograph of part of a leaf of Red oak Quercus rubra, in autumn colour. The yearly colour change of the leaves of deciduous trees... more
Title
Leaf Of Red Oak In Autumn Colour
Artist
George Bernard/science Photo Library
Medium
Photograph
Description
Oak leaf. Macrophotograph of part of a leaf of Red oak Quercus rubra, in autumn colour. The yearly colour change of the leaves of deciduous trees occurs as a biochemical process. A change is signalled by the accumulation of lipid droplets (fat) in the chloroplasts of leaf cells which contain the green chlorophyll pigment. As photosynthesis in the chloroplasts slows down due to shorter daylight hours and lipid production increases, leaf colour changes occur. Until finally the leaf loses its green colour. Enzymes in the leaf stem cause the leaf to fall. This leaf specimen was found in Scotland.
Uploaded
February 15th, 2021
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