1.7.7.1 nitrite + 6 reduced ferredoxin + 7 H+ - 1.7.7.1 nitrite + 6 reduced ferredoxin + 7 H+ assimilatory nitrite reductase 1.7.7.1 nitrite + reduced ferredoxin - 1.7.7.1 nitrite + reduced ferredoxin second enzyme of photosynthetic nitrate-reducing system 1.7.7.1 nitrite + reduced ferredoxin second step of nitrate assimilation 1.7.7.1 nitrite + reduced ferredoxin a severe suppression of nitrite reductase by antisense technology drastically reduces the growth and development of transformed tobacco plants