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作物还需要一些对其生长发育有特殊作用,需量甚微的活性物质,这类物质称植物激素。日前已知活体内合成的植物激素有五大类,即生长素、赤霉素、细胞分裂素、脱落酸和乙烯。人们合成的许多有机化合物,具有类似天然激素的效应,这些物质称植物生长调节剂。植物激素和生长调节剂统称植物生长物质,它们在生产上的应用日益广泛,对作物的生长发育起着重要的调节控制作用。
Crops also need some of their growth and development have a special role, with little demand for active substances, these substances called plant hormones. It is known that there are five major classes of plant hormones synthesized in vivo, namely auxin, gibberellin, cytokinin, abscisic acid and ethylene. Many organic compounds synthesized by humans have the similar effect as natural hormones, and these substances are called plant growth regulators. Plant hormones and growth regulators, collectively referred to as plant growth substances, are used extensively in production and play an important regulatory role in crop growth and development.