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Measuring Spatial and Temporal Ca2+ Signals in Arabidopsis Plants
Published on: September 2, 2014
A salinity-induced C3-CAM transition increases energy conservation in the halophyte Mesembryanthemum crystallinum L
Ewa Niewiadomska1, Barbara Karpinska, Elzbieta Romanowska
1Institute of Plant Physiology, Polish Academy of Sciences, Niezapominajek 21, 30-239 Krakow. e.niewiadomska@ifr-pan.krakow.pl
Abstract:
A strongly increased ATP/ADP ratio was found during the nocturnal phase I in crassulacean acid metabolism (CAM)-induced Mesembryanthemum crystallinum plants. Conversely, during the daytime phase III in CAM-performing plants the ATP/ADP ratio dropped to a similar level to that of C3 plants, cytochrome c oxidase activity was stimulated and mitochondrial Mn-superoxide dismutase activity was strongly increased. The findings suggest that a salinity-induced C3-CAM transition might be an efficient energy-conserving strategy for M. crystallinum plants, in which the strong nocturnal ATP production seems to be, at least partially, independent from the coupled mitochondrial electron transport.
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