Abstract
The assimilatory reduction of nitrate and nitrite in the white and green leaves of chlorophyll mutants of rice ( Oryza sativa L.) were investigated by feeding the leaf sections with 15N-labeled substrates in vivo in darkness. Small nitrate reduction and considerable nitrite assimilation into amino acids were observed in the white leaves, while both activities were active in the green leaves. This work confirmed the occurrence of dark nitrate and nitrite reduction in the leaves even if they lacked in the development of the chloroplasts.
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