Plant nonpolar conjugates

An early indication that a widely used agricultural chemical might be metabolized to a nonpolar conjugate in plants came from an in vitro enzyme study with C-labeled surfactants of the Triton family. A crude particulate enzyme preparation from com shoots catalyzed the formation of fatty acid ester conjugates from the two 1"c-labeled polyethoxylated surfactants indicated below (Equation 32). The ester conjugates were formed primarily from palmitic and linoleic acids 0851). They were identified by mass spectrometry and by GLC analysis of hydrolysis products (J48). In vljro, rice and... 

Flavonols These compounds are widely distributed in plants and vegetal foods, the most widespread being quercetin, kaempferol, isorhamnetin, and myricin. Among them, quercetin is the most abundant dietary flavonol [7] since this compound is present in onion. Quercetin exhibits nonpolar properties, and thus in nature is mostly found conjugated with one or more sugar molecules. 

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