. Auxins and plant growth. Auxin; Plant growth promoting substances. PIGMENT INDOLEAGETIG AGIO. INDOLEALDEHYDE + GO2 Fig. 43. A scheme for the photo-destruction of indoleacetic acid (adapted from Larsen, 1951). Figure 43 represents diagrammatically a concept of the auxin- destroying mechanisms in plants. In this scheme, step 1 involves the oxidation of a reduced pigment or flavo-protein complex. This step utilizes oxygen, and presumably forms peroxide. Step 2 is the en- zymatic step involved in auxin destruction and the evidence indicates that, in peas at least, the enzyme involved may be a pe
. Auxins and plant growth. Auxin; Plant growth promoting substances. PIGMENT INDOLEAGETIG AGIO. INDOLEALDEHYDE + GO2 Fig. 43. A scheme for the photo-destruction of indoleacetic acid (adapted from Larsen, 1951). Figure 43 represents diagrammatically a concept of the auxin- destroying mechanisms in plants. In this scheme, step 1 involves the oxidation of a reduced pigment or flavo-protein complex. This step utilizes oxygen, and presumably forms peroxide. Step 2 is the en- zymatic step involved in auxin destruction and the evidence indicates that, in peas at least, the enzyme involved may be a peroxidase. By means of this step indoleacetic acid is oxidized to indolealdehyde plus carbon dioxide. An alternative reaction, 2a can occur at this point, a process by which indoleacetic acid is oxidized without the participa- tion of an enzyme. This auto-oxidation is a non-enzymatic destruction of auxin. Still another non-enzymatic destruction of auxin may con-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Leopold, A. Carl (Aldo Carl), 1919-. Berkeley, University of California Press
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