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S3307，即烯效唑，是三唑类植物生长延缓剂。其作用机理是通过抑制贝壳杉烯氧化酶活性来阻断赤霉素的生物合成，降低内源赤霉素水平；通过影响吲哚乙酸氧化酶活性，氧化游离吲哚乙酸，降低内源吲哚乙酸水平，从而延缓植物生长。虽然S3307生物学效应与多效唑类似，但生物活性比
S3307, namely uniconazole, triazole plant growth retardants. Its mechanism of action is by inhibiting the activity of kaurene enhanse to block the gibberellin biosynthesis and reduce the level of endogenous gibberellin; By affecting the activity of indoleacetic acid oxidase, free indole acetic acid oxidation, reduce the endogenous indole Acetic acid level, thereby retarding plant growth. Although S3307 biological effects and paclobutrazol similar, but the biological activity ratio