1 / 32

Sucrose metabolism in developing northern red oak ( Quercus rubra ) acorns

Sucrose metabolism in developing northern red oak ( Quercus rubra ) acorns. Shi-Jean Susana Sung and Paul P. Kormanik Institute of Tree Root Biology USDA Forest Service, Athens, GA. Sink Strength (J Warren-Wilson, 1967). -1. Sink Strength (g d ) =

chidi
Download Presentation

Sucrose metabolism in developing northern red oak ( Quercus rubra ) acorns

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Sucrose metabolism in developing northern red oak (Quercus rubra) acorns Shi-Jean Susana Sung and Paul P. Kormanik Institute of Tree Root Biology USDA Forest Service, Athens, GA

  2. Sink Strength (J Warren-Wilson, 1967) -1 Sink Strength (g d ) = Sink Size (g) x Sink Activity (g g d ) -1 -1 Sink size: weight, volume, length, number of sinks Sink type: vegetative, reproductive Sink activity: import of C-14, turgor pressure, growth rate, respiration rate, enzyme activity

  3. Sucrose UDP 3 2 1 Glc + Fru Glc + Fru Fru + UDP-Glc PPi UTP ATP ADP ATP ADP Enzymes 1) Sucrose synthase 2) Acid invertase 3) Neutral invertase 4) UDPglucopyrophosphorylase 5) Fructokinase 6) Glucokinase 7) Phosphoglucoseisomerase 8) Phosphoglucomutase 9) PPi-phosphofructokinase 10) ATP-phosphofructokinase 6 5 4 7 Glc-1-P Glc-6-P Fru-6-P 8 Glc-6-P 7 Fru-6-P PPi Pi ATP ADP 10 9 Fru-1,6-P2 Pyruvate

  4. Time course of Phaseolus vulgaris seed development S.S. Sung et al. Plant Cell Environ (1994) 17, 419

  5. Time course of development of a typical Phaseolus vulgaris fruit (one pod plus five seeds) S.S. Sung et al. Plant Cell Environ (1994) 17, 419

  6. Northern red oak seed orchard at Flint River Nursery, GA May 2002

  7. June 7, 2002

  8. 6-7 7-11 8-6 9-3 10-10

  9. Outside crown Inside crown

  10. July 11, 2002 undeveloped

  11. aborted July 11, 2002

  12. 12 acorns

  13. acorn dropped

  14. Most acorns loose/dropped

  15. June 7, 2002: Acorns branches without leaves

  16. Acorn branches without leaves

  17. Acorn branches without leaves

  18. 6-7 7-11 8-6 9-3 10-10

  19. May 2002

  20. July 26, 2002

  21. July 26, 2002

More Related