Az Eszterházy Károly Tanárképző Főiskola Tudományos Közleményei. 2004. Sectio Biologiae. (Acta Academiae Paedagogicae Agriensis : Nova series ; Tom. 25)

Dulai, S., Csizi, K., Sass-Gyarmati, A., Orbán, S. and Molnár, I.: Combined effects of Thylakoid Energisation Level and Water Deficit on Thermal Stability of Photosystem II in a Dessication Tolerant Moss

132 Dulai, S. et al. Table 2 Effects of the short-term osmotic treatments (-1.3 and-2.5 MP a) and of decreased relative water content (R WC) on the breakpoints of the F

0 vs. T curves (in darkness) in green segments of Homalothecium lutescens. Heating for the F

0 vs. T curves was started after 30 min dark relaxation. The results are means of data from five independent measurements on different segments from different plants. Treatment T

c T 1 P F1/2 Control (100% RWC) 41.2±0.86 46.1±2.06 43.2±1.6 -1.3 MPa (30 min) 41.9±1.23 46.3±1.53 43.5±1.16 -2.5 MPa (30 min) 40.9±1.62 47.1±2.12 44.0±1.82 -98% RWC (24-48 hours) 41.5±1.63 46.9±1.87 43.6±1.82 -90% RWC (24-48 hours) 41.8±1.44 46.0±1.18 42.9±0.97 Table 3 Effects of different short-term osmotic treatments and of different relative water contents on the breakpoints of the F

s vs. T curves in green segments of Homalothecium lutescens at 100 pmol m

2 s'

1 AL intensity. Heating for the F

s vs. T curves was started when the photosynthesis was steady at 100 jimol m~ s

! AL intensity. The results are means of data from five independent measurements on different segments from different plants. Treatment T

c T 1 P F\a Control (100% RWC) 45.210.52 52.111.27 47.310.87 -1.3 MPa (30 min) 46.911.23 52.911.18 49.010.72 -2.5 MPa (30 min) 48.111.44 54.1+1.01 50.410.89 -98% RWC (24-48 hours) 47.110.78 55.611.87 50.111.32 -90% RWC (24-48 hours) 48.010.51 56.810.94 51.311.07