Review Chapter 10 - Review Chapter 10 Short Answer 1 Who...

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Review Chapter 10 Short Answer 1. Who made the profound statement “ohne Wuchstoff, kein Wachstum,” which when translated means without growth substances no growth? F. W. Went 2. List the six classes of plant hormones. Auxins, Gibberellins, cytokinins, abscisic acid, ethylene, brassinosteroids 3. Provide one commercial use for auxins, gibberellins, cytokinins, and ethylene. Auxins- inducting roots, controlling weeds Gibberellins- controlling fruit development Cytokinins- controlling fruit development Ethylene- delaying or promoting ripening 4. List three researchers who were pioneers in auxin research and list their contributions. Darwin- initiated research Went- how much is in a sample Kogel- heteroauxin from human urine 5. What is the only active auxin found in plants? IAA (indole acetic acid) 6. Provide eight physiological processes in which auxins have a role. Cellular elongation, gravitropism, apical dominance, root initiation, cell elongation, ethylene production, fruit growth, sex expression, weed control 7. Give two synthetic auxins and a commercial use for each. Indole-3-butyric acid (IBA) Napthalene acetic acid (NAA) Both used in adventitious root formation 2, 4 D (herbicide) 8. Who was the scientist who first crystallized gibberellin A and what material was used for purification?
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Yabuta (gibberella fujikuroi fungus) 9. Provide seven physiological processes in which gibberellins have a regulatory role. Stimulates cell growth, bolting and flowering, seed germination, dormancy, sex expression, fruit growth, parthenocarpy(development of fruits without pollination or fertilization) 10. What is the series of events that takes place during germination in barley seeds starting with where gibberellins are synthesized?
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