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以往的研究表示成熟的红花烟籽中不存在植物碱,或认为不成熟时烟籽中含有的相当量的烟碱,在成熟时消失了;黄花烟的成熟烟籽中却存在烟碱,或认为黄花烟烟籽只有在发芽的最初四天中含有烟碱;在N、glutinosa的成熟烟籽中没有烟碱,但在发芽时去甲基烟碱和烟碱同时出现了.红花烟的烟籽在发芽后72小时有人测查到烟碱存在,幼苗内植物碱的出现时间与根的延长相符合.检查证明根的长度增加的同时,烟碱浓度也在增加,用烟草与蕃茄嫁接说明植物碱主要是在根部合成而转移到植株中,也有例子证
Previous studies have shown that there is no plant alkaloid in mature safflower seeds, or that nicotine contained in the seeds when immature is mature, which disappears when mature; Or that yellow tobacco smoke seeds contained nicotine only during the first four days of germination and that there was no nicotine in the mature tobacco seeds of N. glutinosa but that both demethyl nicotine and nicotine appeared at the time of germination. Of the tobacco seed 72 hours after germination found nicotine exists, seedling plant alkaloids appear with the extension of the roots consistent with the inspection showed that the root length increases, while the nicotine concentration is also increasing, with tobacco and tomatoes Grafting instructions plant alkaloids are mainly synthesized in the roots and transferred to plants, there are examples of evidence