Monitoring and controlling GA in crops can ensure efficient development of the crops, which is very significant to agriculture and horticulture. Since the content of a phytohormone in a plant is very low, and easily decomposed by heat, light, and oxygen, the traditional methods such as GC, HPLC, ELISA, and radioimmunoassay are usable for the phytohormone assay, but some of them require sophisticated instrumentation or radioactive chemicals or are time consuming. So, exploring simple and convenient methods for phytohormone assay is of considerable interest to the phytohormonal research.
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