Research and application status of plant growth regulators

In the 1930s, plant biologists Thimann and Skoo et al. studied indoleacetic acid (IAA) 's apex dominance, cuttings and roots, and its control over the formation of seedless fruits, and the research and application of plant growth regulators began.

By the 1960 s to the classification of plant hormone and the application of auxin, naphthalene acetic acid, gibberellin, symbol of plant growth regulator research gradually mature, to hundreds of plant growth regulator research gradually mature today, today hundreds of artificial human into and application of plant growth regulator, marks the plant growth regulator the rise of the industrial age.

Plant physiologists divided the endogenous hormones found in plants into eight categories, namely, auxin, cytokinin, gibberellin, abscisic acid, ethylene, brassinolide, polyamine, jasmonic acid, etc. Plant growth regulators are divided into four categories according to their effects and purposes, namely, plant growth promoters, plant growth inhibitors, plant growth retardants and herbicides. China began to produce and apply plant growth regulators in the 1950s.