10-days-old wheat and maize seedlings differentially reduced shoot fresh and dry weights
during the following 16days. Metribuzin was the most reductive while butachlor was the
least. The herbicides slightly affected the activities of nitrate reductase (NR, EC 1.6. 6.1) and
nitrite reductase (NiR, EC 1.7. 7.1) but greatly inhibited glutamine synthetase (GS, EC 6.3.
1.2) and glutamate synthase (GOGAT, EC 1.4. 7.1) activities. Meanwhile, there were …