Effect of high temperature on dehydration-induced alterations in photosynthetic characteristics of the resurrection plant Haberlea rhodopensis

• DOI: 10.1007/s11099-013-0063-9
• Publication Date: 2013-10-23T14:47:24Z
• Authors: M. Velitchkova; V. Doltchinkova; D. Lazarova; G. Mihailova; S. Doncheva; K. Georgieva
• Keywords: Plant Physiology

The effect of high temperature (HT) and dehydration on the activity photosynthetic apparatus its ability to restore membrane properties, oxygen evolution, energy distribution upon rehydration were investigated in a resurrection plant, Haberlea rhodopensis. Plants growing under low irradiance their natural habitat desiccated air-dry state at similar light intensity [about 30 μol(photon) m-2 s-1] optimal day/night (23/20°C) or (38/30°C) temperature. Our results showed that HT alone reduced desiccation plants 38°C it had more detrimental compared with 23°C. study isolated thylakoids demonstrated increased excitation PSI as result treatment, which was enhanced desiccation. It could be related partial destacking thylakoid membranes, confirmed by electron microscopy data. In addition, surface charge density membranes from higher comparison those 23°C, agreement decreased stacking. Dehydration led decrease amplitudes yields loss oscillation pattern. Following rehydration, recovery CO2 assimilation fluorescence properties better when performed Rehydration resulted flash well population S0 However, not observed dehydrated 38°C.