EFFECT OF ZING TOXICITY ON SOYBEAN

The present investigation was planned to study the effect of zinc acetate toxicity on soybean plants of three varieties namely KAL/T4R, BRAGG and PK 472, under laboratory conditions. Response of soybean plants of each variety to different concentrations of zinc acetate was observed intermittently for 24, 48 and 72 hrs. It was compared simultaneously with a control made up of deionized water. Characterization and quantification of certain growth characteristic of zinc acetate treated plants indicated decreased fresh weight, dry mater accumulation, root length, shoot length, chlorophyll and carotenoid contents. Similarly, starch and protein contents were also decreased considerably with higher concentration of zinc acetate treated soybean scedlings. Varieties PK 472 and BRAGG showed more reduction instead of var. KAL / T4R.