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Inositol(1,4,5)trisphosphate production in plant cells: an early response to salinity and hyperosmotic stress
Author(s) -
Drøbak Bjørn K,
Watkins Peter A.C
Publication year - 2000
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/s0014-5793(00)01941-4
Subject(s) - osmotic shock , osmotic concentration , inositol , osmoregulation , salinity , chemistry , microbiology and biotechnology , biophysics , biology , biochemistry , receptor , ecology , gene
Salinity and hyperosmotic stress are environmental factors that severely affect the growth and development of plants. Adaptation to these stresses is known to be a complex multistep process, but a rise in cytoplasmic Ca 2+ and increased polyphosphoinositide turnover have now been identified as being amongst the early events leading to the development of tolerance. To determine whether a causal link exists between these two events we have investigated the effects of several salts and osmotic agents on levels of inositol(1,4,5)trisphosphate (Ins(1,4,5)P 3 ) in plant cells. Our data show that salts as well as osmotic agents induce a rapid and up to 15‐fold increase in cellular Ins(1,4,5)P 3 levels. The increase in Ins(1,4,5)P 3 occurs in a dose‐dependent manner and levels remain elevated for at least 10 min. These data indicate that increased Ins(1,4,5)P 3 production is a common response to salt and hyperosmotic stresses in plants and that it may play an important role in the processes leading to stress tolerance.