Zeng, L.; Wang, X.; Kang, M.; Dong, F.; Yang, Z. Regulation of the Rhythmic Emission of Plant Volatiles by the Circadian Clock. Int. J. Mol. Sci. 2017, 18, 2408.
Abstract
Like other organisms, plants have endogenous biological clocks that enable them to organize their metabolic, physiological, and developmental processes. The representative biological clock is the circadian system that regulates daily (24-h) rhythms. Circadian-regulated changes in growth have been observed in numerous plants. Evidence from many recent studies indicates that the circadian clock regulates a multitude of factors that affect plant metabolites, especially emitted volatiles that have important ecological functions. Here, we review recent progress in research on plant volatiles showing rhythmic emission under the regulation of the circadian clock, and on how the circadian clock controls the rhythmic emission of plant volatiles. We also discuss the potential impact of other factors on the circadian rhythmic emission of plant volatiles.
Keywords: biosynthesis; circadian clock; emission; plant volatile; rhythm; substrate; transcription
Figure 1. (A,B) Techniques for the collection and detection of volatiles emitted from plants. After collection, emitted volatiles are separated and analyzed by gas chromatography-mass spectrometry (GC-MS). (A) Static collection by solid phase microextraction (SPME); (B) dynamic collection using dynamic automatic sampling system. Airflow is controlled by two pumps and is filtered through an active carbon filter. Blue arrows indicate airflow direction; (C) rhythmic emissions of volatiles under direct light regulation and under control of the endogenous circadian clock.
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