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序言生物体内之各器官及组织,决非单独个别存在,而係调和统一发挥浑然一体之生命现象。即就植物而言,种子受水分温热而发芽,幼芽沐陽光而欣欣生长,终至開花结实,育於暗室之幼苗,必竭求获得日光,以示所谓向光性,水平放置之幼根,则必曲向下方,以示所谓向地性。反之,水平放置之幼莖则必向上屈曲,以示所谓背地性。如此之適应自然之作用,寧非造物之奇。十九世纪初,生物学者相率注意此事,Darwin,Fitting,Boysen-Jensen,Went.等先哲,孜孜研究之结果,羣认为植物体内,必具有一种特殊物质,主宰生命之神秘机能,此即植物荷尔蒙观念之由来。植物荷尔蒙与普通之榮养物质不同,並非构成植物体之材料,不过以极微量之存在,对植物之生理作用,发生极重大之刺激作用。
Preface All organs and tissues in a living organism are by no means isolated individually, but harmoniously and uniformedly play a life-like phenomenon. That is, in terms of plants, the seeds germinate by the warm water, seedlings Mu sunlight and Showtime growth, and finally flowering firm, nurturing seedlings in darkroom, will be desirous of obtaining sunlight, to show the so-called to the light, horizontal placement of the young Roots, then the song will be down to show the so-called to the nature. Conversely, the young stem placed horizontally will buckle upward to show the so-called back-ground nature. So adapt to the role of nature, rather than the strange creatures. At the beginning of the nineteenth century, the biologists paid close attention to this issue. Darwin, Fitting, Boysen-Jensen, Went, and other philosophers diligently studied and concluded that plants must have a special substance that dominates the mysterious function of life. That is, the concept of plant hormones. Plant hormones and ordinary Rongrong different substances, not constitute the plant material, but with a trace of the existence of the physiological role of plants, a great stimulus.