Hormones213-page10 - lateral buds resulting in more shrubby...

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Plant Growth Regulators - 10 Cytokinins can promote axillary (lateral) bud growth by over-riding the apparent inhibiting effect of auxin. This is one of the ways in which plants balance root and shoot growth. Shoot tip auxins inhibit lateral bud activation. Cytokinins produced in root meristems travel upward in xylem and if in higher concentration counter the inhibition of auxins to activate
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Unformatted text preview: lateral buds, resulting in more shrubby appearance with many branches. • Cytokinins can also promote lateral expansion in both stems and roots, particularly in storage roots. • Cytokinins also retard leaf senescence, probably by stimulating RNA and protein synthesis and delaying degradation of chlorophyll. Cytokinin treated Leaf (R) Cytokinin treated plant (L) Crown gall tumor...
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