Paraquat was fed into the terminal leaders of five-year-old slash pine trees and collected at weekly intervals for 4 weeks.Cytological observations showed a decrease in starch levels and a corresponding increase in content of oleoresin. Quantitative analysis indicated a decrease in starch accompanying increases in fatty acids, monoterpenes, and resin acids.
Brown, Claud L.; Clason, Terry R.; Michael, Jerry L. 1976. Paraquat Induced Changes in Reserve Carbohydrates, Fatty Acids and Oleoresin Content of Young Slash Pines. Proceedings of the Lightwood Research Coordinating Council. 20-21