| 1. | Cytokinin signaling in plants is mediated by a two-component phosphorelay.
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| 2. | Cytokinins have recently been found to play a role in plant pathogenesis.
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| 3. | The most important of these are auxins and cytokinins.
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| 4. | Auxin also stimulates cell division if cytokinins are present.
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| 5. | Most adenine-type cytokinins are synthesized in roots.
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| 6. | Cambium and other actively dividing tissues also synthesize cytokinins.
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| 7. | Production of cytokinins by " Pseudomonas fluorescens"
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| 8. | Auxin and cytokinin play a role in the earlier stages of aleurone development.
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| 9. | Xylem tissues can be generated when the auxin concentration is equal to the cytokinins.
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| 10. | No phenylurea cytokinins have been found in plants.
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