Sucrose-phosphate synthase is regulated via metabolites and protein phosphorylation in potato tubers, in a manner analogous to the enzyme in leaves

Planta ◽  
1994 ◽  
Vol 192 (4) ◽  
Author(s):  
Ralph Reimholz ◽  
Peter Geigenberger ◽  
Mark Stitt
Keyword(s):  
Protein Phosphorylation ◽  
Sucrose Phosphate Synthase ◽  
Potato Tubers ◽  
Sucrose Phosphate ◽  
Phosphate Synthase

scholarly journals Sucrose metabolism in cold-stored potato tubers with decreased expression of sucrose phosphate synthase

1998 ◽  
Vol 21 (3) ◽  
pp. 285-299 ◽  
Author(s):  
K.-P. Krause ◽  
L. Hill ◽  
R. Reimholz ◽  
T. Hamborg Nielsen ◽  
U. Sonnewald ◽  
...  
Keyword(s):  
Sucrose Phosphate Synthase ◽  
Sucrose Metabolism ◽  
Potato Tubers ◽  
Sucrose Phosphate ◽  
Phosphate Synthase

scholarly journals Changes in Sugars and Activities of Sucrose Phosphate Synthase, Sucrose Synthase, and Invertase during Potato Tuber (Russet Burbank) Reconditioning at 10 °C in Air and 2.53 kPa Oxygen after Storage for 28 Days at 1 °C

1998 ◽  
Vol 123 (2) ◽  
pp. 311-316 ◽  
Author(s):  
Charmara Illeperuma ◽  
Donald Schlimme ◽  
Theophanes Solomos
Keyword(s):  
Solanum Tuberosum ◽  
Western Blot ◽  
Sucrose Synthase ◽  
Sucrose Phosphate Synthase ◽  
Russet Burbank ◽  
Potato Tubers ◽  
Gradual Decline ◽  
Sharp Rise ◽  
Sucrose Phosphate ◽  
Phosphate Synthase

Potato tubers (Solanum tuberosum `Russet Burbank') were stored at 1 °C in air for 28 days and then transferred to 10 °C in either air or 2.53 kPa O2. During cold storage there was an increase in sucrose, glucose, and fructose. The activities of extractable sucrose phosphate synthase (SPS) and invertase increased by 2.2- and 7.7-fold, respectively, during 28 days at 1 °C. The activity of sucrose synthase (SS) remained constant at 1 °C and was similar to that found in tubers kept continuously at 10 °C. With the transfer of tubers from 1 to 10 °C, there was an initial sharp rise in respiration which peaked at ≈7 days, followed by a gradual decline. Sucrose declined rapidly during reconditioning, while glucose and fructose declined more slowly. With the transfer of tubers from 1 to 10 °C, the activity of SS increased sharply after 7 days at 10 °C, to be followed by a decline to the levels found in control tubers. The activities of both extractable SPS and invertase decreased during reconditioning, reaching the values of the control tubers within ≈15 days. Low O2 inhibited the decrease in sugars and suppressed the rise in SS activity, but it did not alter the decrease in SPS and invertase. Western blot analysis showed that the amount of SPS protein remained unchanged at 1 and 10 °C. These results indicate that the activity of SPS is regulated by factors other than the amount of its protein. The activities of the above three enzymes showed no changes in tubers kept at 10 °C continuously. In control tubers SPS showed the highest activity, followed by SS and invertase.

Decreased expression of sucrose phosphate synthase strongly inhibits the water stress-induced synthesis of sucrose in growing potato tubers

1999 ◽  
Vol 19 (2) ◽  
pp. 119-129 ◽  
Author(s):  
Peter Geigenberger ◽  
Ralph Reimholz ◽  
Uta Deiting ◽  
Uwe Sonnewald ◽  
Mark Stitt
Keyword(s):  
Water Stress ◽  
Sucrose Phosphate Synthase ◽  
Potato Tubers ◽  
Sucrose Phosphate ◽  
Phosphate Synthase
Sign in / Sign up

Export Citation Format

Share Document