Abstract
Firefly luciferase is widely used as a bioluminescence reporter, which is simple, high signal-to-noise ratio and especially suitable for the long-term analysis of circadian clock-regulated gene expression. Here, we report the method of tracking circadian rhythms in Agrobacterium rhizogenes-induced soybean hairy roots via TopCount™ Microplate Scintillation Counter or Deep-Cooled CCD camera. Using transgenic soybean hairy roots, we monitored the endogenous 24-h oscillations of clock genes expression and investigated the precise parameters of circadian rhythmicity. Researchers can easily analyze the circadian phenotype in legumes and non-legumes using bioluminescence reporters carried by the hairy roots, avoiding time-consuming transgenic work.
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