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Diurnal extension profiles of Col-0 (n = 8), pgm (n = 9), sex1 (n = 4), mex1 (n = 6), dpe1 (n = 11) and dpe2 (n = 9). Root extension of 12-day-old seedlings grown in 16 h photoperiods, T = 21°c was monitored. Values represent averages of four consecutive days plus SE.
