Abstract
Light was required for induction of nitrate reductase (NR, E.C. 1.6.6.1) in intact cotyledons of 2-day old seedlings ofLactuca sativa L. Molybdate strongly enhanced efficiency of induction. Benzyladenine (BA), gibberellin, and succinic acid-2,2-dimethylhydrazide reduced the enzyme activity. BA thrice enhanced incorporation of labelled leucine to the protein fraction. (2-chloroethyl)trimethylammonium chloride did not affect NR activity and markedly inhibited greening and protein synthesis. KNO3 stimulated protein synthesis as well as growth of the cotyledons.
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Abbreviations
- Alar or B-9:
-
succinic aoid-2,2-dimethylhydrazide
- BA:
-
N6-benzyladenine
- CCC:
-
(2-ohloroethyl)trimethylammonium chloride
- CAP:
-
chloramphenicol
- CHI:
-
cycloheximide
- FU:
-
5-fluorouraoil
- GA3 :
-
gibberellic acid
- NR:
-
nitrate reduotase
- NRA:
-
NR activity
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Knypl, J.S., Janas, K.M. Light and molybdenum requirements for substrate induction of nitrate reductase in cotyledons of lettuce,Lactuca sativa L.. Biol Plant 21, 214–219 (1979). https://doi.org/10.1007/BF02884572
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DOI: https://doi.org/10.1007/BF02884572