Figure 21.1 Tumor that formed on a tomato stem infected with the crown gall bacterium PP5e-Fig-21-01-0.jpg

Ch. 21 In-Text Art, p. 623 Kinetin PP5e-ITA-21-p623-0.jpg

Ch. 21 In-Text Art, p. 624 trans-zeatin, cis-zeatin, benzyladenine, and thidiazuron PP5e-ITA-21-p624-0.jpg

Figure 21.2 Structures of other aminopurines that are active as cytokinins PP5e-Fig-21-02-0.jpg

Figure 21.3 Witches’ broom on a fir tree PP5e-Fig-21-03-0.jpg

Figure 21.4 Tumor induction by Agrobacterium tumefaciens PP5e-Fig-21-04-0.jpg

Figure 21.5 Biosynthetic pathway for cytokinin biosynthesis PP5e-Fig-21-05-0.jpg

Ch. 21 In-Text Art, p. 629 Level of active cytokinin in a particular cell PP5e-ITA-21-p629-0.jpg

Figure 21.6 Simple versus phosphorelay types of two-component signaling systems PP5e-Fig-21-06-0.jpg

Figure 21.7 Phenotypes of Arabidopsis plants harboring mutations in the cytokinin receptors PP5e-Fig-21-07-0.jpg

Figure 21.8 Comparison of the structures of the type-A and type-B ARRs PP5e-Fig-21-08-0.jpg

Figure 21.9 Model of cytokinin signaling PP5e-Fig-21-09-0.jpg

Figure 21.10 Tobacco plants overexpressing genes for cytokinin oxidase PP5e-Fig-21-10-0.jpg

Figure 21.11 Cytokinin is required for normal growth of the shoot apical meristem PP5e-Fig-21-11-0.jpg

Figure 21.12 Comparison of the rosettes of wild-type Arabidopsis and the mutant PP5e-Fig-21-12-0.jpg

Figure 21.13 Cytokinin suppresses the growth of roots PP5e-Fig-21-13-0.jpg

Figure 21.14 Cytokinin suppresses the size and cell division activity of roots PP5e-Fig-21-14-0.jpg

Figure 21.15 CYCD3-expressing callus cells can divide in the absence of cytokinin PP5e-Fig-21-15-0.jpg

Figure 21.16 Regulation of growth and organ formation in cultured tobacco callus PP5e-Fig-21-16-0.jpg

Figure 21.17 Map of the T-DNA from an Agrobacterium Ti plasmid PP5e-Fig-21-17-0.jpg

Figure 21.18 Interaction of auxin and cytokinin in the regulation of shoot branching PP5e-Fig-21-18-0.jpg

Figure 21.19 Leaf senescence is retarded in a transgenic tobacco plant containing ipt PP5e-Fig-21-19-0.jpg

Figure 21.20 Effect of cytokinin on the movement of an amino acid in cucumber seedlings PP5e-Fig-21-20-0.jpg

Figure 21.21 Cytokinin influence on the development of wild-type Arabidopsis PP5e-Fig-21-21-0.jpg

Figure 21.22 Leaf senescence is retarded in transgenic lettuce plants expressing ipt PP5e-Fig-21-22-0.jpg

Figure 21.23 Cytokinin regulates grain yield in rice PP5e-Fig-21-23-0.jpg