Title of article :
Glutamate dehydrogenase isoenzyme 3 (GDH3) of Arabidopsis thaliana is regulated by a combined effect of nitrogen and cytokinin
Author/Authors :
Marchi، نويسنده , , Laura and Degola، نويسنده , , Francesca and Polverini، نويسنده , , Eugenia and Tercé-Laforgue، نويسنده , , Thérèse and Dubois، نويسنده , , Frédéric and Hirel، نويسنده , , Bertrand and Restivo، نويسنده , , Francesco Maria، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2013
Pages :
7
From page :
368
To page :
374
Abstract :
In higher plants, NAD(H)-glutamate dehydrogenase (GDH; EC 1.4.1.2) is an abundant enzyme that exists in different isoenzymic forms. In Arabidopsis thaliana, three genes (Gdh1, Gdh2 and Gdh3) encode three different GDH subunits (β, α and γ) that randomly associate to form a complex array of homo- and heterohexamers. The modification of the GDH isoenzyme pattern and its regulation was studied during the development of A. thaliana in the gdh1, gdh2 single mutants and the gdh1-2 double mutant, with particular emphasis on GDH3. Investigations showed that the GDH3 isoenzyme could not be detected in closely related Arabidopsis species. The induction and regulation of GDH3 activity in the leaves and roots was investigated following nitrogen deprivation in the presence or absence of sucrose or kinetin. These experiments indicate that GDH3 is likely to play an important role during senescence and nutrient remobilization.
Keywords :
Nitrogen starvation , Cytokinin , glutamate dehydrogenase , Isoenzymes , Subunits
Journal title :
Plant Physiology and Biochemistry
Serial Year :
2013
Journal title :
Plant Physiology and Biochemistry
Record number :
2124236
Link To Document :
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