[Effects of nitrogen nutritional deficiency on the distribution of particular lipids in a eutrophic lake milieu].
The seasonal distribution of particulate lipids coupled with N-nutrient availability was studied in eutrophic Lake Aydat (Massif Central, France). The concentrations of lipids ranged between 196.9 and 2971.5 micrograms.l-1 (mean +/- s.d. = 1090.1 +/- 705.5 micrograms.l-1. Lipids were abundant in summer and fall when nitrates were insufficient reflecting thus an orientation of cell metabolism towards an accumulation of storage products. In such conditions, the heterocystous Cyanobacteria were found to develop due to their competitive advantage of exploiting atmospheric nitrogen. Their lipid metabolism did not seem to be affected at least partially by NO3- exhaustion.
Aleya
L
L
Laboratoire de Zoologie et Protistologie U.A.-C.N.R.S. n.138, Université Blasie Pascal, Aubière, France.
Blacketta
K
K
D000458:Cyanobacteria / Q000254:growth & development*; D056890:Eukaryota / Q000254:growth & development; D005602:France; D005618:Fresh Water / Q000032:analysis*; D050356:Lipid Metabolism; D008055:Lipids / Q000032:analysis*; D009584:Nitrogen / Q000172:deficiency*; D012621:Seasons; D014871:Water Microbiology
D008055:Lipids; D009584:Nitrogen
Effets de la déficience nutritionnelle en azote minéral sur la distribution des lipides particulaires en milieu lacustre eutrophe.