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什么是植物激素呢?根据国际植物学会会议规定:“植物激素是由植物产生的调节剂,它们在低浓度时,调节植物的生理过程。激素在植物体内通常自产生部位移动到作用部位。”由此可知植物激素的特征是:(1)内生的;(2)能移动的(移动性的大小和方式随植物激素的种类而不同);(3)低浓度有调节功能。植物激素与其它有机营养物质不同之处,在于它们在体内含量极低(一般约为植物鲜重的十亿分之一至一千万分之一)便能对植物的生长发育等生命现象起调节作用,缺少它植物便不能正常生长发育。
What is phytohormones? According to the International Society for Botany: “Plant hormones are plant-generated regulators that regulate plant physiology at low concentrations, and hormones usually move from the site of production to the site of action in plants.” This shows that the characteristics of plant hormones are: (1) endogenous; (2) can move (the size and mode of mobility vary with the type of plant hormone); (3) low concentrations have regulatory functions. Plant hormones and other organic nutrients are different in that they are very low in the body (usually about the plant fresh weight one billionth to one ten millionth) will be able to plant growth and development and other life phenomena Regulatory effect, the lack of its plants can not grow and develop normally.