[1] Krause G H,Weis E.Chlorophyll fluorescence and photosynthesis.Annu Rev Plant Physiol Plant Mol Biol,1991,42(2):313～349

[2] Schreiber U,Bilgerw N C.Chlorophyll fluorescence as Q nonintrusive indicator for vapid assessment of in vivo photosynthesis.In:Ecophysiology of photosynthesis (Schulze E D & Caldwell M M eds.) Berliin:springer-Verlag,1994:49～70

[3] Fryer M J,Andrews J R,Oxborough K,et al.Relationship between CO2 assimilation,photosynthetic electron transport and active O2 metabolism in leaves of maize in field during periods of low temperature.Plant Physiol,1998,116(3):571～580

[4] Somersalo S,Krause G H.Reversible photoinhibition of unhardened and cold-acclimated spinach leaves at chilling temperatures.Planta,1990,180(1):181～187

[5] Oquist G,Hurry V M,Huner N P A.Low temperature effects on photosynthesis and correlation with freezing tolerance in spring and winter cultivars of wheat and rye.Plant Physiol,1993,101(2):245～250