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Transgenic Nicotiana plumbaginifolia plants that express either a 5-fold increase or a 20-fold decrease in nitrate reductase (NR) activity were used to study the relationships between carbon and(More)
To study the effect of root-zone pH on characteristic responses of NH4+ -fed plants, soybeans (Glycine max¿L.¿ Merr. cv. Ransom) were grown in flowing solution culture for 21 d on four sources of N(More)
The activity of nitrate reductase (NR) in leaves is regulated by light and photosynthesis at transcriptional and posttranscriptional levels. To understand the physiological role of these controls, we(More)
The mechanisms priming the production, the movement, and the transient and final storage of the photoassimilated carbon in the maize plant were examined at the metabolic level during the formation of(More)