Plant Growth Regulators

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Across
  1. 3. Auxins promote the branching of __________ while cytokinins inhibit the branching of ________. (same word)
  2. 5. Plants treated with growth retardants are compact making them more attractive, often greener, and easier to __________.
  3. 6. Gibberellin ____________ winter dormancy of plants while abscisic acid promotes it; samem is true for seed dormancy.
  4. 9. Play a key role in stimulating the development of flowers and also cause internodes to stretch.
  5. 13. This hormone is produced in the roots of the plants.
  6. 14. Hormones and synthetic growth regulators are known as these (abbreviated).
  7. 18. Since these types of flowers have no roots and their lives are shortened, they are sometimes sprayed with cytokinins to extend their vase life.
  8. 20. Growth or movement response of a cell or an organism to gravity.
  9. 21. This fruit is picked and shipped green so before they are delivered to grocery stores, they are placed in storage and treated with ethylene gas which causes them to ripen.
  10. 22. Auxins migrate down the _______ from the apical meristem.
Down
  1. 1. The response by a plant to bend toward a light source.
  2. 2. This hormone speeds the aging of plant parts, especially fruit.
  3. 4. Abscisic acid is sometimes called the ________ hormone because it promotes changes in a plant in response to unfavorable growing conditions.
  4. 7. A common problem with your poinsettia plants if they are spaced too closely and begin to shade one another.
  5. 8. Cytokinins are produced in the roots of the plants and are transported through the plant via the _______.
  6. 10. Which plant hormone is at work when the stem of the plant gets really long and "lanky"?
  7. 11. This layer of cells loses their grip on the stem making the leaves to fall in autumn because auxin levels decline and ethylene is produced.
  8. 12. If we want seeds to germinate, the level of abscisic should be __________.
  9. 14. A common practice used to produce bushy, well-branched floriculture crops; this practice stops the flow of auxins down the stem allowing side shotts to develop.
  10. 15. The abscisic acid causes this to close on leaves in times of drought.
  11. 16. Naturally occurring chemicals that regulate all growth and development of plants.
  12. 17. How many different groups of hormones are produced in plants?
  13. 19. Auxins inhibit the growth of __________ shoots while cytokinins promote _________ shoots. (same word)