RESEARCH REPORTS TGC REPORT 52, 2002
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ones. This evidence supports the idea about more favorable relationship between water
use and growth capacity of the iaglu transgenic tomato plants.
Recently a tryptophan racemase was found in wheat leaves (Rekoslavskaya et
al.1999) that was activated during drought and osmotic stresses. As a result the amino
acid D-tryptophan appeared as if it was used for IAA biosynthesis as an additional and
direct precursor source during period of recovery after drought. Preliminary studies of
the tryptophan racemase activity were carried out in excised tomato leaves. In turgid
control tomato leaves the activity was lower than in transgenic. Artificially wilting the
leaves, placing on 0.5M mannitol solution, the activity of tryptophan racemase increased
in leaves of transgenic plants and diminished in control leaves.
As a whole the insertion of iaglu gene in tomato plants seems to have effects useful
in tomato cultivation and productivity.
Literature Cited
Rekoslavskaya N. I., Yurjeva O. V., Salyaev R. K., Mapelli S., Kopytina T. V., 1999.
Bulgar. J. Plant Physiol. 25: 39-49.
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