Arabidopsis annexin1 mediates the radical-activated plasma membrane Ca2+ - and K+ -permeable conductance in root cells
نویسندگان
چکیده
Laohavisit, A., Shang, Z., Rubio, L., Cuin, T. A., Very, A.-A., Wang, A., Mortimer, J. C., Macpherson, N., Coxon, K. M., Battey, N. H., Brownlee, C., Park, O. K., Sentenac, H., Shabala, S., Webb, A. A. R. and Davies, J. M. (2012) Arabidopsis annexin1 mediates the radical-activated plasma membrane Ca2+ and K+ -permeable conductance in root cells. The Plant Cell, 24 (4). pp. 1522-1533. ISSN 1040-4651 doi: 10.1105/tpc.112.097881 Available at http://centaur.reading.ac.uk/27903/
منابع مشابه
Arabidopsis annexin1 mediates the radical-activated plasma membrane Ca²+- and K+-permeable conductance in root cells.
Plant cell growth and stress signaling require Ca²⁺ influx through plasma membrane transport proteins that are regulated by reactive oxygen species. In root cell growth, adaptation to salinity stress, and stomatal closure, such proteins operate downstream of the plasma membrane NADPH oxidases that produce extracellular superoxide anion, a reactive oxygen species that is readily converted to ext...
متن کاملFree oxygen radicals regulate plasma membrane Ca2+- and K+-permeable channels in plant root cells.
Free oxygen radicals are an irrefutable component of life, underlying important biochemical and physiological phenomena in animals. Here it is shown that free oxygen radicals activate plasma membrane Ca(2+)- and K(+)-permeable conductances in Arabidopsis root cell protoplasts, mediating Ca(2+) influx and K(+) efflux, respectively. Free oxygen radicals generate increases in cytosolic Ca(2+) medi...
متن کاملIdentification of cyclic GMP-activated nonselective Ca2+-permeable cation channels and associated CNGC5 and CNGC6 genes in Arabidopsis guard cells.
Cytosolic Ca(2+) in guard cells plays an important role in stomatal movement responses to environmental stimuli. These cytosolic Ca(2+) increases result from Ca(2+) influx through Ca(2+)-permeable channels in the plasma membrane and Ca(2+) release from intracellular organelles in guard cells. However, the genes encoding defined plasma membrane Ca(2+)-permeable channel activity remain unknown in...
متن کاملVoltage-dependent calcium-permeable channels in the plasma membrane of a higher plant cell.
Numerous biological assays and pharmacological studies on various higher plant tissues have led to the suggestion that voltage-dependent plasma membrane Ca2+ channels play prominent roles in initiating signal transduction processes during plant growth and development. However, to date no direct evidence has been obtained for the existence of such depolarization-activated Ca2+ channels in the pl...
متن کاملArabidopsis root K+-efflux conductance activated by hydroxyl radicals: single-channel properties, genetic basis and involvement in stress-induced cell death.
Reactive oxygen species (ROS) are central to plant stress response, signalling, development and a multitude of other processes. In this study, the plasma-membrane hydroxyl radical (HR)-activated K(+) channel responsible for K(+) efflux from root cells during stress accompanied by ROS generation is characterised. The channel showed 16-pS unitary conductance and was sensitive to Ca(2+), tetraethy...
متن کامل