Glutamine synthetase-glutamate synthase pathway and glutamate dehydrogenase play distinct roles in the sink-source nitrogen cycle in tobacco.

Glutamate (Glu) metabolism and amino acid translocation were investigated in the young and old leaves of tobacco (Nicotiana tabacum L. cv Xanthi) using [15N]ammonium and [2-15N]Glu tracers. Regardless of leaf age, [15N]ammonium assimilation occurred via glutamine synthetase (GS; EC 6.

Expression of a ferredoxin-dependent glutamate synthase gene in mesophyll and vascular cells and functions of the enzyme in ammonium assimilation in Nicotiana tabacum (L.).

GLU1 encodes the major ferredoxin-dependent glutamate synthase (Fd-GOGAT, EC 1.4.7.

[Acute asthmatic crisis in children].

Acute asthma attack in children is an attack responsible for life-threatening acute respiratory distress with partial or no response to bronchodilator drugs. The severity of the episode needs to be quickly evaluated. This presupposes a perfect knowledge of the clinical signs of severity.

[Severe trauma in children].

Trauma are responsible for approximately 50% of the deaths of the pediatric population between 1-15 years of age. This high mortality rate, associated with frequent sequelae, leading sometimes to severe handicaps, is a major problem of public health in the developed countries. Pediatric trauma have some particularities, due to anatomical and physiological differences, and to specific injury mechanisms.