GA Dwarf

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GA Dwarf

  1. 2. Plain Lanolin Dwarf Pea Plant
  2. 3. Gibberellic Acid added to one plant
  3. 4. Tall plant Lanolin has no effect
  4. 5. Several weeks later, the gibberellic acid has acted on the plant causing it to grow, showing the lanolin has no effect on growth because the plant lacks the gene which is involved in gibberellic acid production. Tall varieties are able to manufacture sufficient gibberellin to make them grow full height unlike dwarf varieties. By Stacey and Amy
  5. 6. Effect of gibberellic acid (GA) on dwarf pea seedlings Dean and Jack
  6. 7. Dwarf Pea Plants
  7. 8. What does the experiment show? <ul><li>The dwarf pea seedlings in the first pot have been treated with the most concentration of gibberellic acid (GA). </li></ul><ul><li>The second pot shows a smaller concentration of GA and the third shows the smallest concentration of GA applied. </li></ul><ul><li>The increase in growth is due to an increase in the length of their internodes. </li></ul>
  8. 9. Internode
  9. 10. What does this mean? <ul><li>In conclusion, the experiment shows that gibberellin is needed by a plant to make its internodes increase in length. </li></ul><ul><li>Tall varieties however, can make gibberellin so they are able to grow to full height. </li></ul><ul><li>The dwarf condition is therefore caused by a shortage of gibberellin due to a genetic deficiency. </li></ul>
  10. 12. Experiment In Book <ul><li>The dwarf pea seedlings in the first pot, which have been treated with acid, reach the same height as a normal tall (untreated) plant. This is due to an increase in length of their . </li></ul><ul><li>The dwarf plant in the second pot is used to show that the effect is not because of the lanolin alone. </li></ul>
  11. 13. Conclusion <ul><li>In conclusion, the experiment shows that is needed by a plant to make its internodes in length. </li></ul><ul><li>Tall varieties can make so they are able to grow to full height. </li></ul><ul><li>The dwarf condition is therefore caused by a of gibberellin due to a deficiency. </li></ul>
  12. 14. By Helen & Kimberley Effects of Gibberellic Acid on Dwarf Pea Seedlings
  13. 15. <ul><li>These are two normal dwarf pea plants. </li></ul>
  14. 16. <ul><li>Here one of the normal dwarf pea plants has been sprayed with Gibberellic acid. </li></ul>
  15. 17. <ul><li>The taller plant has grown due to the Gibberellic Acid. </li></ul><ul><li>Taller Plants are able to take in sufficient Gibberellic to make them grow to their full height. </li></ul>
  16. 18. <ul><li>The Gibberellin is needed in a plant to make its internodes increase in length. Internodes are space between two sets of leaves. </li></ul>
  17. 19. Thanks for watching!

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