J. Kaiser

Nitrate reductase and glutamine synthetase activity in leaves and roots of nitrate-fedHelianthus annuus L.

O. Lewis, J. Kaiser, 1984, Plant and Soil.

NITRATE-NITROGEN ASSIMILATION IN THE LEAVES OF HELIANTHUS ANNUUS L.

O. Lewis, J. Kaiser, 1980 .

K+ Modulation of Nitrogen Uptake and Assimilation in Plants

S. Lips, M. Soares, S. H. Lips, 1987 .