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cGMP modulates gene transcription and cation transport in Arabidopsis roots
Author(s) -
Maathuis Frans J. M.
Publication year - 2006
Publication title -
the plant journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.058
H-Index - 269
eISSN - 1365-313X
pISSN - 0960-7412
DOI - 10.1111/j.1365-313x.2005.02616.x
Subject(s) - arabidopsis , microbiology and biotechnology , second messenger system , gene , transcription (linguistics) , biology , chemistry , gene expression , ion transporter , biochemistry , signal transduction , membrane , linguistics , philosophy , mutant
Summary The occurrence of the second messenger 3′,5′‐cyclic guanyl monophosphate (cGMP) has been shown in a number of plant species, including barley, tobacco and Arabidopsis. Physiological processes where cGMP signalling has been observed, or has been inferred, to play a role include chloroplast development, α ‐amylase production in aleurone tissue, NO‐dependent expression of defence‐related genes and salt/osmotic stress. In most cases, it is unknown how cGMP exerts its effects and what the downstream targets are. A transcriptomics approach was therefore used to identify putative targets for cGMP signalling. Root exposure to 10 μ m membrane permeable cGMP induced changes in abundance for many transcripts involved in metabolism, gene transcription, signalling and defence. In particular, monovalent cation transporters such as non‐selective ion channels and cation:proton antiporters were found to be affected in cGMP exposed roots. In addition, exposure to cGMP was found to modulate influx and efflux of the monovalent cations Na + and K + .