Abstract
Abstract Photoinhibition under low temperature conditions is considered to be one of the major factors for the reduction of the photosynthetic activity of leaves during winter in the temperate climate zone in chilling-sensitive plants (Oguist et al. 1987). Photoinhibition has been manifested by the changes in CO2-dependent O2 evolution rate and fluorescence intensity in intact leaves and isolated chloroplasts (Powles and Bjorkman 1982; Powles et al. 1983; Somersalo and Krause 1989). Although short term inhibition and/or recovery has been observed in chilling-sensitive plants (Cleland et al. 1986; Greer et al. 1986; Terashima et al. 1991a, b), the role of photoinhibitory reduction under natural chilling conditions in the photosynthetic capacity of grasses has not been clarified yet.
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