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Strigolactones

Strigolactones. Will Hefner Melanie Urtel Dylan Brown Sava Turcanu. Molecular Formula. C 17 H 14 O 5. Background. Strigolactone was discovered more than 40 years ago. Shinjiro Yamaguchi, has recently found strigolactone is a plant hormone that inhibits shoot branching.

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Strigolactones

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  1. Strigolactones Will Hefner Melanie Urtel Dylan Brown Sava Turcanu

  2. Molecular Formula • C17H14O5

  3. Background • Strigolactone was discovered more than 40 years ago. • Shinjiro Yamaguchi, has recently found strigolactone is a plant hormone that inhibits shoot branching. • Its name was derived from a genus of root parasitic that penetrate the roots of other plants. • Strigolactones were first identified as chemical signals that stimulate the germination of Striga seeds (witch weed).

  4. Origin • Strigolactoneis produced from Carotenoids. • These hormones and signals are produced in the roots in response to low phosphate conditions or high auxin flow from the shoot.

  5. Destination • Strigolactones is produced at the base of the root and sent throughout the roots to attract fungi and prevent lateral growth.

  6. Response/Function • Strigalactones are involved in promoting germination in root-parasitic plants. • Plays a role in attracting mycorrhizal fungi to the root. • Suppress lateral shoot branching and promotes apical dominace.

  7. Reception • Binds with intracellular receptor. Response • Mycorrhizal fungi transport minerals from the soil to the plant, while the plant gives the fungi sugars ‘in return’. The fungi allows the root system further into the ground and to obtain more nutrients. Enables symbiotic relationship to occur.

  8. “Although we have a long history of research in plant hormones, we are still ignorant about many things. I think there are other plant hormones that still remain undiscovered, and I really hope to find them.” - Shinjiro Yamaguchi

  9. Sources • http://www.chiralix.com/rightclick.cfm?id=51675&rc_frame_3=61574 • http://www.rikenresearch.riken.jp/eng/frontline/6205 • http://www.plantphysiol.org/content/160/3/1329.abstract • http://www.sciencedaily.com/releases/2008/08/080812100327.htm • http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/S/Strigolactones.html • Campbell NA, Reece JB. 2011. Biology. 9th ed. San Francisco (CA): Pearson/Benjamin Cummings

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