Page 159 - Photosynthesis: The Green Miracle

Harun Yahya

The Factors Influencing Photosynthesis
As the following sections will show, photosynthesis is a very com-
plex and delicate process, and every part of the plant has special struc-

tures for the task. However, the elements necessary for photosynthesis are
not limited to the plant’s structure. As you have already seen, the wave-
lengths of the light that penetrate the atmosphere have been created to be
in complete harmony with photosynthesis. However, other factors also
have impact on the process.

1. Light Intensity and Duration

Photosynthesis varies depending on the intensity and duration of the

light, and whether the light arrives directly or in a diffuse form. There are
significant differences between direct sunlight and that filtered or reflect-
ed by clouds, fog and other bodies. Direct rays constitute 35% of total
light, and scattered light, between 50 and -60%. Since scattered light has a
greater physiological effect, plants’ needs for light are actually met in full.
Plants are divided into sun-loving and shade-loving species, accord-
ing to their needs for these two types of light. Sun-lovers have been creat-
ed to obtain maximum efficiency by receiving sunlight directly, while
shade-lovers achieve maximum photosynthesis with light arriving more

indirectly, as in forests or in cold and cloudy climates.
Trees such as beech, lime, elm, and ash trees have been created to be
capable of living in both types of environment.

2. Level or Density of Light

The further north or south from the equator one goes, the longer the
variation between periods of night and day—and the photosynthesis
linked to this illumination. The duration of daylight causes increased pho-

tosynthesis with a result in faster rapid, short-term growth, flowering and
leaf production. Flowers time their blooming according to length of day.

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