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Horticulture Principles and Practices

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FIGURE 5–8<br />

glycolysis.<br />

A summary of<br />

GLUCOSE<br />

Glucose-6-Phosphate<br />

FRUCTOSE-6-PHOSPHATE<br />

2 NAD +<br />

Fructose-1,6-Diphosphate<br />

3-PHOSPHOGLYCERALDEHYDE<br />

2 NADH<br />

2 ADP + 2P i<br />

3-Phosphoglyceric Acid<br />

PYRUVIC ACID<br />

1,3-Diphosphoglyceric Acid<br />

2 ATP<br />

PHOSPHOPHENOL PYRUVIC ACID<br />

(2 molecules)<br />

FIGURE 5–9 A summary of<br />

the Krebs cycle. The cycle always<br />

begins with acetyl CoA, which is<br />

its only real substrate.<br />

PYRUVIC ACID<br />

ACETYL CoA<br />

NAD +<br />

NADH<br />

Oxaloacetic<br />

acid<br />

Citric acid<br />

Malic acid<br />

KREBS<br />

CYCLE<br />

Isocritric acid<br />

CO<br />

Fumaric acid<br />

2<br />

ATP<br />

Alpha<br />

FADH 2 ketoglutaric acid<br />

Succinic acid<br />

FAD<br />

CO 2<br />

NADH NAD +<br />

NADH<br />

ADP + P i<br />

NAD +<br />

166 Chapter 5 Plant Physiology

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