%0 Journal Article %1 RN1117 %A Rienmüller, F. %A Beyhl, D. %A Lautner, S. %A Fromm, J. %A Al-Rasheid, K. A. S. %A Ache, P. %A Farmer, E. E. %A Marten, I. %A Hedrich, R. %D 2010 %J Plant and Cell Physiology %K and ca(2) myOwn ph sensitivity %N 9 %P 1548-1554 %R 10.1093/pcp/pcq102 %T Guard Cell-Specific Calcium Sensitivity of High Density and Activity SV/TPC1 Channels %U /brokenurl#<Go to ISI>://WOS:000281952800017 %V 51 %X The slow vacuolar (SV) channel, a Ca(2)-regulated vacuolar cation conductance channel, in Arabidopsis thaliana is encoded by the single-copy gene AtTPC1. Although loss-of-function tpc1 mutants were reported to exhibit a stoma phenotype, knowledge about the underlying guard cell-specific features of SV/TPC1 channels is still lacking. Here we demonstrate that TPC1 transcripts and SV current density in guard cells were much more pronounced than in mesophyll cells. Furthermore, the SV channel in motor cells exhibited a higher cytosolic Ca(2) sensitivity than in mesophyll cells. These distinct features of the guard cell SV channel therefore probably account for the published stomatal phenotype of tpc1-2.

@article{RN1117, abstract = {The slow vacuolar (SV) channel, a Ca(2)-regulated vacuolar cation conductance channel, in Arabidopsis thaliana is encoded by the single-copy gene AtTPC1. Although loss-of-function tpc1 mutants were reported to exhibit a stoma phenotype, knowledge about the underlying guard cell-specific features of SV/TPC1 channels is still lacking. Here we demonstrate that TPC1 transcripts and SV current density in guard cells were much more pronounced than in mesophyll cells. Furthermore, the SV channel in motor cells exhibited a higher cytosolic Ca(2) sensitivity than in mesophyll cells. These distinct features of the guard cell SV channel therefore probably account for the published stomatal phenotype of tpc1-2.}, added-at = {2024-02-14T14:38:32.000+0100}, author = {Rienmüller, F. and Beyhl, D. and Lautner, S. and Fromm, J. and Al-Rasheid, K. A. S. and Ache, P. and Farmer, E. E. and Marten, I. and Hedrich, R.}, biburl = {https://www.bibsonomy.org/bibtex/2dc5986008998b156b01881cb0fecc8b9/rainerhedrich_2}, doi = {10.1093/pcp/pcq102}, interhash = {00c2fbfabf434881c88b49350cc5bd4a}, intrahash = {dc5986008998b156b01881cb0fecc8b9}, issn = {0032-0781}, journal = {Plant and Cell Physiology}, keywords = {and ca(2) myOwn ph sensitivity}, note = {651un Times Cited:31 Cited References Count:33}, number = 9, pages = {1548-1554}, timestamp = {2024-02-14T14:38:32.000+0100}, title = {Guard Cell-Specific Calcium Sensitivity of High Density and Activity SV/TPC1 Channels}, type = {Journal Article}, url = {/brokenurl#<Go to ISI>://WOS:000281952800017}, volume = 51, year = 2010 }