The effect of exogenous proline on the activity of the glycolate pathway in Nicotiana tabacum cv. Xanthi n.c. [glycine, serine, glycine decarboxylase]
1980
Vallee, J.C. | Vansuyt, G. | Prevost, J. (INRA, Dijon (France). Station de Physiopathologie Vegetale)
An exogenous proline supply in the light provokes an increase in free glycine concentration in apical tissues or in leaf disks of vegetative Nicotiana tabacum L. cv. Xanthi n.c. This does not occur in the equivalent tissues of tobacco plants after floral induction, these being naturally rich in proline. In vegetative tobacco, we have tried to determime this specific action of exogenous proline. With ('14)C glycine, ('14)CO(,2) experiments (Pulse-chase) and glycine decarboxylase activity determinations, we observed that glycine-serine transformation was inhibited by proline sypply. Presently it is important to determine if endogenous proline acts on the same reaction
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