An enzymic site of inhibition of gibberellin biosynthesis by Amo 1618 and other plant growth retardants.

Abstract

\Wirwille and M1itchell reported that apl)lications of 2'-isoprol)vl-4'-(trimethv lammllonium chloride) -5'- methylphenvl piperidine-1-carboxvlate (Amo 1618) (fig 1, I) to several types of flowNering plants led to ani abnormial growth habit characterized by shorter stemiis and initernodes (17). Amo 1618 is one of the mllost active of several carbamate esters containiing a q uarternarv ami-moniiumii group which prodluce this effect (12). Cathey has recently reviewed the physiological effects of these and other plant growAlth re- tardants (2). Sachs et al. (