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Salt and osmotic stress cause rapid increases in Arabidopsis thaliana cGMP levels

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JournalFEBS Letters
DatePublished - 2 Jul 2004
Issue number1-3
Volume569
Number of pages4
Pages (from-to)317-320
Original languageEnglish

Abstract

A guanylyl cyclase has been recently identified in Arabidopsis but, despite the use of pharmacological inhibitors to infer roles of the second messenger 3,5-cyclic guanosine monophosphate (cGMP), very few measurements of actual cGMP levels in plants are available. Here, we demonstrate that cGMP levels in Arabidopsis seedlings increase rapidly (≤5 s) and to different degrees after salt and osmotic stress, and that the increases are prevented by treatment with LY, an inhibitor of soluble guanylyl cyclases. In addition, we provide evidence to suggest that salt stress activates two cGMP signalling pathways - an osmotic, calcium-independent pathway and an ionic, calcium-dependent pathway.

    Research areas

  • cAMP, 3,5-cyclic adenosine monophosphate, cGMP, cGMP, 3,5-cyclic guanosine monophosphate, CNGCs, cyclic nucleotide gated ion channels, Cytosolic calcium, NaCl stress, Osmotic stress

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