Abstract
Nitrate reductase (NR) activity estimated byin vivo andin vitro methods in 17 days old pea seedlings is the highest in young fully expanded leaves (4th leaf from the stem base). NO3-N content is parallel to the NR activity being also highest in the 4th leaf. On the other hand the activity of glutamine synthetase (GS) is the highest in the youngest leaves which had not yet reached their maximum size (5th leaf). Equilibrium between NO3-N content and activity of enzymes involved in assimilation of nitrogen containing compounds in individual leaves is discussed in relation to their insertion.
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Gaudinová, A. The effect of leaf insertion on nitrate reductase and glutamine synthetase activity and NO3-N content inPisum sativum L.. Biol Plant 24, 468–470 (1982). https://doi.org/10.1007/BF02880447
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DOI: https://doi.org/10.1007/BF02880447