caa a22 4500 397520425 CHVBK 20180308164631.0 cr unu---uuuuu 161202e199512 xx s 000 0 eng 10.1093/jxb/46.12.1867 doi (NATIONALLICENCE)oxford-10.1093/jxb/46.12.1867 Light affects the flux of Ca2+ from excised tomato leaves within four seconds [Elektronische Daten] [Stanley Ries, Irvin Widders, Rebecca Baughan] The flux of Ca2+ from excised tomato leaves, conditioned in 100 mM KCI for 60 min, was shown to be affected by turning an incandescent light (32 μmol m−2 s−1) on or off. Calcium concentrations were measured with a single junction combination electrode connected to a high impedence electrometer amplifier interfaced with a microcomputer. Net Ca2+ fluxes from excised leaves 30 s prior to and 30 s after turning on the light were 68 and 122pmol g −1 dry weight s −1 respectively. The Ca2+ fluxes for the 30 s prior to and 30 s after turning off the light were 113 and 51 pmol g−1 dry weight s−1 respectively. Close examination of the first 10 s after the light was turned off showed that there was a 4 s delay in the flux of Ca2+ . The heat given off by the incandescent bulb had no effect on Ca2+ flux during these short time periods. The effect of light on the Ca2+ flux was evident for at least 2 h after the initial treatment. © Oxford University Press Research Papers nationallicence Ca2+ nationallicence signalling nationallicence light nationallicence tomato nationallicence Ries Stanley Department of Horticulture, Plant and Soil Science Building, Michigan State University, East Lansing, MI 48824-1325, USA aut Widders Irvin Department of Horticulture, Plant and Soil Science Building, Michigan State University, East Lansing, MI 48824-1325, USA aut Baughan Rebecca Department of Horticulture, Plant and Soil Science Building, Michigan State University, East Lansing, MI 48824-1325, USA aut Journal of Experimental Botany Oxford University Press 46/12(1995-12), 1867-1876 0022-0957 46:12<1867 1995 46 exbotj https://doi.org/10.1093/jxb/46.12.1867 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/jxb/46.12.1867 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ries Stanley Department of Horticulture, Plant and Soil Science Building, Michigan State University, East Lansing, MI 48824-1325, USA aut NATIONALLICENCE 700 1- Widders Irvin Department of Horticulture, Plant and Soil Science Building, Michigan State University, East Lansing, MI 48824-1325, USA aut NATIONALLICENCE 700 1- Baughan Rebecca Department of Horticulture, Plant and Soil Science Building, Michigan State University, East Lansing, MI 48824-1325, USA aut NATIONALLICENCE 773 0- Journal of Experimental Botany Oxford University Press 46/12(1995-12), 1867-1876 0022-0957 46:12<1867 1995 46 exbotj Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford