Abstract
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.
Keywords
Osmotic shockOsmotic concentrationInositolOsmoregulationSalinityChemistryCell biologyBiophysicsBiologyBiochemistryReceptorEcologyGene
MeSH Terms
AdaptationPhysiologicalCalciumCell FractionationCell MembraneDaucus carotaEnzyme ActivationHydrogen-Ion ConcentrationInositol 145-TrisphosphateOsmolar ConcentrationOsmotic PressureSodium ChlorideType C Phospholipases
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Publication Info
- Year
- 2000
- Type
- article
- Volume
- 481
- Issue
- 3
- Pages
- 240-244
- Citations
- 97
- Access
- Closed
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Cite This
Bjørn K. Drøbak,
Paul A. Watkins
(2000).
Inositol(1,4,5)trisphosphate production in plant cells: an early response to salinity and hyperosmotic stress.
FEBS Letters
, 481
(3)
, 240-244.
https://doi.org/10.1016/s0014-5793(00)01941-4
Identifiers
- DOI
- 10.1016/s0014-5793(00)01941-4
- PMID
- 11007971