Influence of Foliar Application of S-Triazine Compounds on Fresh Weight, Dry Weight, Chemical Composition, and Enzymatic Activity of Pea and Sweet Corn Seedlings

We applied 5 and 2 parts/10⁶ of simazine, atrazine, igraii,GS-14254, propazine, prometryne, prometone, or ametryne to thefoliage of 3-week-old seedlings of peas (Pisum sativum L., cv.Perfected Freezer) and sweet corn (Zea mays L.f cv. Iochief)growing under greenhouse conditions on perlite and suppliedwith complete Hoagland's solution. The results indicated a highercontent of protein in the treated leaves than in the leavesof untreated controls. (7 to 35 per cent for pea seedlings and0 to 50 per cent for corn seedlings.) Treated leaves had significantlyless starch and sugars than the controls. The activities ofnitrate reductase (NRase) and glutamic-pyruvic transaminase(transaminase) were enhanced, but there was no significant effecton ribonuclease (RNase).