The effects of growth temperature on changes in net photosynthetic rate (P(N)) and the chlorophyll fluorescence induction parameter F(v)/F(m) were investigated after cold stress in inbred maize Fines with different degrees of cold tolerance. There was no significant difference between lines grown at optimum temperatures of 25/23 and 20/18 °C as regards P(N) and F(v)/F(m) determined at the growth temperature, but these parameters were lower for plants grown at a suboptimum temperature of 15/13 °C. After cold treatment, the decrease in P(N) was more pronounced in chilling-sensitive lines. The higher the growth temperature was, the more pronounced decrease occurred in P(N) and F(v)/F(m). Thus at low growth temperature both damaging and adaptive processes occur.
ASJC Scopus subject areas
- Plant Science