Effects of various fungicides in soil on water and amino acid transport in tomato plants

Abstract

Nabam (I), methylmercury dicyandiamide (II), Dexon (III), nonenylsuccinic acid (IV) and its monomethyl ester (V), benomyl, Vitavax, Plantvax, and Uniroyal F849 and G696 were applied as drenches to the soil of potted tomato plants. Exudate collected for 6 h from the stumps of plants detopped 24 h after application of each chemical was markedly reduced in volume and total amino acid content by I–V but not the others. Relative levels of individual amino acids were little affected except that I induced changes in the relative amounts of several primary amino acids, and II increased alanine concentration in the exudates.