Sugars and enzyme activity in the grass Deschampsia antarctica Export

@article{Zunigafeestetal_03, abstract = {Abstract: Deschampsia antarctica is a freezing-tolerant plant and the only native Poaceae that grows in the Maritime Antarctic. During the long days of the growing season this plant accumulates sucrose (Suc) in the leaves to 36\% of the dry weight. The mechanism that leads to this high accumulation is unknown. The effect of day length and low temperature on sucrose phosphate synthase (SPS) (EC: 2.4.1.14) activity and sugar accumulation was studied in D. antarctica and compared with other Poaceae. Three different day lengths: short (SD) (8/16 h), medium (MD) (16/8 h) and long (LD) (21/3 h); and two temperatures: 4C (cold- acclimated) and 15C (non-acclimated) were tested. The highest contents in total soluble sugars (TSS) and Suc were reached in crowns and leaves, respectively, in cold-acclimated plants under LD. TSS and Suc contents and SPS activity with cold acclimation were higher in D. antarctica than in other agricultural (wheat, oat and barley) and non-agricultural (D. caespitosa and D. beringensis) Poaceae species. Suc/TSS ratio was higher in all Deschampsia species than in agricultural Poaceae species. SPS activity and sucrose content in leaves were positively correlated only in LD cold acclimated plants. This result shows that SPS activity is responsive to day length in D. antarctica.}, author = {Feest, Zuniga A. and Inostroza, P. and Vega, M. and Bravo, L. A. and Corcuera, L. J.}, citeulike-article-id = {1524137}, journal = {Antarctic Science}, keywords = {antarctic, bibtex-import, grass, solutes, temperature}, pages = {483--491}, posted-at = {2007-07-31 07:40:19}, priority = {2}, title = {Sugars and enzyme activity in the grass Deschampsia antarctica}, volume = {4}, year = {2003} }

TY - JOUR ID - Zunigafeestetal_03 L3 - citeulike-article-id:1524137 N2 - Abstract: Deschampsia antarctica is a freezing-tolerant plant and the only native Poaceae that grows in the Maritime Antarctic. During the long days of the growing season this plant accumulates sucrose (Suc) in the leaves to 36% of the dry weight. The mechanism that leads to this high accumulation is unknown. The effect of day length and low temperature on sucrose phosphate synthase (SPS) (EC: 2.4.1.14) activity and sugar accumulation was studied in D. antarctica and compared with other Poaceae. Three different day lengths: short (SD) (8/16 h), medium (MD) (16/8 h) and long (LD) (21/3 h); and two temperatures: 4C (cold- acclimated) and 15C (non-acclimated) were tested. The highest contents in total soluble sugars (TSS) and Suc were reached in crowns and leaves, respectively, in cold-acclimated plants under LD. TSS and Suc contents and SPS activity with cold acclimation were higher in D. antarctica than in other agricultural (wheat, oat and barley) and non-agricultural (D. caespitosa and D. beringensis) Poaceae species. Suc/TSS ratio was higher in all Deschampsia species than in agricultural Poaceae species. SPS activity and sucrose content in leaves were positively correlated only in LD cold acclimated plants. This result shows that SPS activity is responsive to day length in D. antarctica. JF - Antarctic Science EP - 491 TI - Sugars and enzyme activity in the grass Deschampsia antarctica VL - 4 SP - 483 KW - antarctic KW - bibtex-import KW - grass KW - solutes KW - temperature AU - Feest, Zuniga AU - Inostroza, P AU - Vega, M AU - Bravo, LA AU - Corcuera, LJ PY - 2003/// ER -