Table 1.

The effect of temperature and photoperiod during 2 weeks of deacclimation on the reacclimation ability of oilseed rape

Temperature of	Photoperiod during	LT50
deacclimation(°C; day/night)	deacclimation(day length; h)	Winter cultivar‘Górczanski’	Spring cultivar‘Star’
2/2 (control)	12	–14·8 ± 0·25	–13·8 ± 0·24
2/12	12	–14·5 ± 0·34	–13·9 ± 0·35
12/2	12	–14·7 ± 0·23	–13·5 ± 0·31
12/12	12	–14·3 ± 0·36	–13·8 ± 0·32
12/12	8	–14·5 ± 0·34	–13·8 ± 0·21
12/12	16	–14·2 ± 0·23	–12·5 ± 0·27
12/20	12	–14·6 ± 0·45	–13·5 ± 0·21
20/12	12	–12·9 ± 0·34	–9·7 ± 0·38
20/20	12	–12·1 ± 0·23	–8·3 ± 0·51
20/20	8	–12·2 ± 0·37	–7·8 ± 0·38
20/20	16	–11·8 ± 0·45	–6·8 ± 0·24

LT₅₀ was measured after 4 weeks of reacclimation at 2 °C by means of electrolyte leakage tests from frozen leaf discs.Indicated confidence intervals for P = 0·05.