Synthetic plant growth regulators

Table 2. Authorized Synthetic Plant Growth Regulators ...

Fig. 3. Synthetic plant growth regulators authorized for use in the United States and elsewhere. See Table 2.

Fig. 5. Experimental synthetic plant growth regulators. See Table 3.

Table 3. Experimental Synthetic Plant Growth Regulators 1...

Controlling Biological Behavior of Plants with Synthetic Plant Growth Regulating Chemicals... 

The work of many investigators soon showed it to be extremely widespread in plants, and it became clear that it was a fundamental plant hormone (e.g., reviews 530, 655a). Excessive production of indoleacetic acid by parasites is responsible for certain types of plant tumor (e.g., 948). The synthetic plant growth regulators, which are in general substituted phenoxyacetic acids, probably function as indoleacetic acid analogues. 

Natural Products as Inducers of Insect Resistance. Plant growth regulators have been shown to increase the biosynthesis of certain secondary plant constituents that in turn decrease plant attack by insects. -Naphthaleneacetic acid, for example, elicits increased terpene biosynthesis in citrus, thus decreasing attack by fruit flies. The approach of using both natural and synthetic plant growth regulators may continue to find applications in insect control. 

Chloroethanephosphonic acid (ETHREL, ethephon), a synthetic plant growth regulator (Cook and Randall, 1968), readily releases ethylene in neutral solution according to the following reaction ... 

The literature pertaining to the interaction of hormones in the regulation of plant cell expansion is extensive. Representative illustrations of hormone interaction will therefore be emphasized and results of studies with synthetic plant growth regulators will not be considered except where they contribute to our understanding of plant hormones. 

---