Journal
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
Volume 298, Issue 2, Pages 247-250Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/S0006-291X(02)02437-3
Keywords
Rubisco; sucrose; salt-stress; mannitol; glycerol; inositol; sorbitol; trehalose; carboxylase; oxygenase
Categories
Ask authors/readers for more resources
Sugars play a critical role in regulating overall cellular metabolism and owing to their general compatibility with various cellular events plants invariably show enhanced levels of sugars for maintaining desired osmoticum under osmotic stress. Sugars (sucrose and trehalose) and sugar-alcohols (glycerol, mannitol, inositol, and sorbitol) with the exception of sorbitol lowered oxygenase activity of Rubisco (ribulose-1,5-bisphosphate carboxylase/oxygenase, EC 4.1.1.39) without altering carboxylase activity under unstressed conditions. Most interestingly, these solutes including sorbitol fully curtailed NaCl-induced enhancement in oxygenase activity, even at concentrations as low as 50 mM. However, none of these solutes could alleviate NaCl-suppressed carboxylase activity. In summary, our findings demonstrate that one of the most important roles of sugars and sugar-alcohols in plants exposed to salt stress is to curtail oxygenase activity of Rubisco. (C) 2002 Elsevier Science (USA). All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available