The Effect Of The On Starch Production

1628 Words Dec 3rd, 2014 7 Pages
Glucose is an important product of the photosynthetic pathway in plant cells. When it is synthesized, it is either transported for use, or it is stored as starch to be used later on. Plants absorb light energy and take up carbon dioxide from the atmosphere to drive the light reactions and Calvin cycle, respectively, in order to create energy for themselves. As the global environment becomes increasingly warm and carbon dioxide accumulates from greenhouse effects, at a rate of 1.5 μmol^-1 per year (Pettersson, McDonald, & Stadenberg, 1993), it would be interesting to discover the effects on starch production, a key element of a plant 's survival as well as rubisco 's ability to fix this excess carbon. It is hypothesized that an influx of carbon dioxide will speed up photosynthesis and drive rapid production of starch and sugars in the plant cell, but may in fact limit rubisco. Of particular interest is to see the effects of elevated carbon dioxide on northern forests, the birch tree for example, as the increase in temperature is sure to cause changes on a molecular level in these trees.
An Increase in Photosynthetic Rate Several studies have been conducted on birch trees in order to determine the effects of elevated levels of atmospheric carbon dioxide versus normal, ambient levels of carbon dioxide. Looking at the leaves of birches exposed to increased levels of atmospheric carbon dioxide, several changes in the morphology of these leaves have been observed. For example,…
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