Fig. 5.

Continuous drought reduces the transcript levels of circadian clock and flowering time genes in barley. Diurnal gene expression of circadian clock genes was measured every 4 h for 24 h with an additional sampling at ZT22 under control (black) and drought (red) conditions under LDs (16 h light/8 h night) in the spring barley cultivars Scarlett and the derived introgression line S42-IL107. Grey areas indicate darkness. Error bars indicate ±SD of three biological replicates; an asterisk indicates a significant difference between control and drought at the respective time point (t-test, P<0.05).